I suppose the assumption is that all power supplies of similar wattage are created equal, but that couldn’t be farther from the truth. PC power supplies can differ in not only more obvious environmental attributes like noise and heat levels, but also in the quality of power they deliver.
Last year, I compared four different power supplies from Antec, Thermaltake, and Vantec. Antec’s TruePower line came out as our Editor’s Choice in that comparison by delivering tight DC voltage tolerances with low noise levels. Today, I’ve rounded up five brand-new power supplies from Ahanix, Antec, Enermax, Vantec, and Zalman to compare with each other and our previous favorite. I’ve updated our power supply testing gauntlet, too. Not only will we be looking at DC voltage tolerances and noise levels, we’ll also take a peek at each power supply’s impact on system temperatures and measure its AC ripple voltage.
Which power supply stands out from the competition as being the quietest, coolest, and cleanest source of PC power? Read on to find out.
Power supplies are usually bunched together based on their total output wattage, but there’s more to wattage than total output. Today we’re dealing with 400 and 550W power supplies, and there’s quite a bit of variety when it comes to distributing that total wattage over available voltage lines.
Maximum output (W)
|Ahanix SilenX 400W||52.8||200||336||1.5||9.6||10|
|Antec TrueControl 550W||105.6||200||288||2.5||12||10|
|Antec TruePower 550W||105.6||200||288||2.5||12||10|
|Enermax EG651P-VE(FMA) 550W||118.8||180||432||5.0||12||11|
|Vantec Ion 400W||85.8||200||192||12||4||12.5|
|Zalman ZM400A-APF 400W||92.4||200||180||1.5||9.6||10|
While Enermax, Vantec, and Zalman’s power supplies all share voltage between the 3.3 and 5V rails, Antec’s TruePower and TrueControl models have dedicated output circuitry for each rail. This dedicated output circuitry comes in handy when a system has an unbalanced overall load that’s biased towards the 3.3 or 5V line. If the 3.3 and 5V lines don’t have to share wattage between them, each line can be loaded to its theoretical limit.
Overall, Enermax’s EG651P-VE(FMA) offers more wattage on the 3.3 and 12V rails than any other power supply we’re looking at today, but only 180W on the 5V rail. Ahanix’s SilenX is a little weak on the 3.3V line, but its maximum 12V wattage is quite strong. Vantec and Zalman’s offerings, on the other hand, offer relatively low 12V wattages but plenty of power on the 5V line.
For reference, here are the maximum output currents for each power supply’s output lines:
Maximum output current (A)
|Ahanix SilenX 400W||16||40||28||0.3||0.8||2.0|
|Antec TrueControl 550W||32||40||24||0.5||1.0||2.0|
|Antec TruePower 550W||32||40||24||0.5||1.0||2.0|
|Enermax EG651P-VE(FMA) 550W||36||36||36||1.0||1.0||2.2|
|Vantec Ion 400W||26||40||16||0.8||1.0||2.5|
|Zalman ZM400A-APF 400W||28||40||15||0.3||0.8||2.0|
Other than Enermax, whose EG651P-VE(FMA) offers the same maximum amperage on the 3.3, 5, and 12V lines, manufacturers tend to offer higher currents on the 5V line.
Theoretical specs are only so exciting, so let’s dive in and take a closer look at what each power supply has to offer.
Ahanix’s SilenX is probably the most spartan power supply in this comparison, which makes it a good place to start. Power supplies don’t necessarily need frills or bundles to complete the package, so the SilenX should be OK without them, so long as its performance and price are competitive. Aesthetically, there’s not much to see with the SilenX; it looks like, well, a power supply.
The SilenX has an external power switch, which a surprising number of power supply manufacturers seem to leave out. A single 80mm fan cools the unit and generates a scant 14 decibels of noise, according to Ahanix. We’ll see in a moment just how quiet this power supply is when it’s running in a complete system.
To make up for its single-fan design, Ahanix gives the SilenX plenty of internal venting. Without a second fan, the SilenX should be quieter than dual-fan power supplies. However, the SilenX’s single fan may have to spin faster than a pair of fans working together might, possibly generating more noise in the process.
As far as cables go, the SilenX is complete but not extravagant. Cables are 20 inches long, which should definitely be long enough for most applications and cases, but may be a little short for double-wide or full-tower cases with hard drive racks near the bottom. The SilenX 400W offers six four-pin Molex connectors and a single floppy plug in addition to a full set of motherboard power connectors. None of the SilenX cables are sheathed, but they’re all zip-tied to reduce tangling.
Antec’s TruePower 550W won our last power supply comparison, so we have high hopes for the TrueControl 550 this time around. As far as I can tell, the actual power supplies inside the TruePower and TrueControl 550 are identical. There are a few cosmetic differences here and there, and the TrueControl has a few extra goodies included. As far as the actual power supply units go, though, I can’t find any significant difference between the two. We’ve already seen that the two share identical current and wattage specs and Antec’s dedicated output circuitry.
Like the TruePower 550, the TrueControl is a plain-looking power supply. Cooled by a 90mm internal fan and a 80mm external fan, the TrueControl is the first of three dual-fan power supplies in this comparison. Fan speeds are controlled by the power supply, which cranks up and throttles back the RPMs as needed. The minimum fan speed can also be controlled using the TrueControl’s drive bay insert, which I’ll get to in a moment.
Like the other power supplies in this comparison, the TrueControl 500W has an external power switch. The unit is also outfitted with an external four-pin Molex connector, though I can’t think of why anyone might need four-pin power on the outside of a case.
The TrueControl 550 isn’t as heavily vented internally as some of the other power supplies we’re looking at today. Fewer vents could make it harder for the TrueControl to cool the interior of a case, forcing its fans to spin faster and louder.
Antec is the only manufacturer in this comparison to offer black power connectors on its power supply, but since the TrueControl itself isn’t black, I’m left scratching my head. The black motif extends to the sheathed motherboard power connector and zip ties, too, but the power supply should really be painted to match.
Whatever Antec’s aesthetic intentions were with the TrueControl, they’ve given it plenty of cable. The motherboard connector stretches a full 21 inches from the power supply, and four-pin Molex connectors reach just over 32 inches. In total, the TrueControl 550 has seven four-pin Molex connectors and two floppy connectors. There are also two four-pin Molex “Fan only” connectors that will keep case fans spinning at the same speed as the power supply’s temperature-controlled fans. These extra two Molex connectors shouldn’t be used with anything other than case fans, but I wonder if they might not be suitable for internal lighting that would get brighter or darker depending on system temperatures.
As its name implies, Antec’s TrueControl lets users do a little tweaking. A 5.25″ drive bay control panel is provided with the TrueControl 550, so users don’t have to crawl around behind their case to fiddle with the power supply’s settings.
Like a few other power supplies on the market, the TrueControl 550W offers users a level of control over the power supply’s fan speeds. The fan speeds are still largely controlled by the power supply, which ramps up the RPMs as temperature levels dictate. However, users can manipulate the power supply’s minimum fan speed with a small knob on the front of the drive bay panel.
In addition to offering control over minimum fan speed levels, the TrueControl offers voltage tweaking via the drive bay insert. Small screws on the front of the drive bay can be turned to raise or lower the voltage level of the 3.3, 5, and 12V rails with either a screwdriver or a removable knob that pops out of the drive bay. The availability of voltage control should allow users to fine tune each voltage line to perfection, and as far as I know, Antec is the only manufacturer to offer such a feature.
It’s important to note that one can easily damage PC components by either under- or over-volting them. In the hands of an inexperienced user, TrueControl can actually do more harm than good, which is probably why a screwdriver is needed for voltage manipulation. The voltage screws aren’t something you’d want to turn accidentally.
If I were judging purely on looks, Enermax’s 550W EG651P-VE(FMA) would definitely take the cake. While certainly not flashy, the power supply has a glossy, deep-blue finish that’s nicer than most case treatments. The dark blue EG651P-VE(FMA) probably isn’t the best cosmetic match for an all-aluminum aesthetic, but I’d love to find a case that matches its color.
The EG651P-VE(FMA) uses an 80mm rear fan and a 90mm bottom fannot only to keep the power supply cool, but also to vent air from the system. Both fans are variable-speed units controlled by the internal power supply temperature, but the rear fan speed can also be adjusted with a knob mounted on the back of the power supply. Having the knob at the rear of the power supply ensures that it’s accessible without having to pop off any case panels, users will still have to crawl behind the back of the case to use it. Because only a few of the power supplies we’re looking at today feature user-controlled fans at all, it’s hard to gripe too much about where Enermax puts the fan speed knob. The knob turns freely, providing plenty of fine-tuning precision, and there’s even a notch to help you know just how close you are to the lowest or highest fan speed.
There’s plenty of venting at the rear of the EG651P-VE(FMA), and the absence of a third fan should keep the unit’s noise levels low. Lower than the others? We’ll soon see.
The EG651P-VE(FMA) is the only power supply in this comparison to not only sheath the main motherboard power connector, but also the other auxiliary motherboard power connectors. It’s not a big deal, really, but this nice little makes the EG651P-VE(FMA) stand out. The individual Molex cables are neatly zip-tied, too.
Ready to stretch across the confines of even the largest full tower cases, the EG651P-VE(FMA)’s motherboard power cables are 20 inches long and the Molex cables stretch a full 33 inches. With eight Molex and two floppy connectors, there are plenty of plugs for massive RAID arrays. There’s even an extra Molex connector that brings the four-pin plug total up to nine, should you need it.
Like most of the other power supplies in this comparison, the EG651P-VE(FMA) comes with a set of four screws. Enermax also throws in a Molex splitter that can power two Serial ATA hard drives and an “Enermax Power Inside” sticker for those who want to advertise their power supply investments. Because it’s the most expensive power supply we’re looking at today, I’m going to whine about the fact that Enermax doesn’t include any zip ties or cable binders in the box. Yes, the EG651P-VE(FMA)’s cables are neatly sheathed and zip-tied to reduce tangling, but it would have been nice for Enermax to include a couple of extra zip ties for securing cables to the interior of a case.
At only $68 online, Vantec’s Ion 400W is the cheapest power supply in this comparison by nearly $30. Still, the Ion manages to pack in a few features that even its more expensive competition forgets. On the surface, the Ion looks rather plain, especially next to Vantec’s all-black “Stealth” line of power supplies. Power supplies don’t have to look good, but since Vantec makes a lot of modding and lighting gear, I expected the Ion to have at least a little visual flair.
Breaking from tradition, Vantec uses 80mm fans for both the Ion’s internal cooling fan and rear exhaust. The internal 80mm fan will have to spin a little faster to move as much air as a 90mm unit, but the impact on overall noise levels may be negligible.
To control the speed of the Ion’s two fans, Vantec offers users three options with a switch at the back of the unit. Users can set the fan speed to “auto” and let the power supply decide when to spin up or spin down the fans, or choose arbitrary “low” or “medium” fan speed settings. Without a “high” fan speed setting, the Ion’s smaller 80mm internal fan may have a rougher time sucking hot air from a system, but it should do a better job than single-fan power supplies.
Also gracing the back of the Ion is a standard three-prong outlet for connecting peripheral devices like monitors, speakers, printers, and so on. Currently, I’m running most of my machines off a tangled array of extension cords and power bars, so an extra power outlet is certainly welcomed.
The Ion 400W’s internals aren’t as riddled with vents as some of the other power supplies we’re looking at today, but the unit does have more internal venting than Antec’s TrueControl.
Despite its relatively low price, the Ion 400W delivers more cabling than any other power supply in this comparison. The sheathed motherboard power connector stretches a full 24 inches from the power supply, and Molex connections are available 36 inches from the unit. The Ion offers a grand total of nine four-pin Molex connectors and two floppy connectors.
The Ion 400W’s box advertises the fact the power supply is “SATA Ready!!!” That’s technically correct, but Serial ATA connectivity is offered through Molex power adapters rather than with native Serial ATA power plugs. Since Serial ATA drives have yet to take the market by storm, it actually makes a lot more sense to use power adapters and retail four-pin Molex connectivity.
In addition to a couple of Serial ATA power adapters, Vantec packs the Ion’s box with four mounting screws and five small zip ties. Those extras probably add only pennies to the overall cost of the power supply, and they’re definitely worth having.
Despite claims by all manufacturers that their power supplies are nice and quiet, Zalman takes things one step further by completely stealthing out the ZM400A-APF in black. The ZM400A-APF should look great in dark cases with neon or UV lighting, though the power supply’s finish isn’t glossy like Enermax’s EG651P-VE(FMA) treatment. Being the only Goth in the crowd does make the ZM400A-APF stand out, though. With a little chrome trim, it could be the power supply your mother warned you about.
Zalman relies on a single 80mm exhaust fan to keep the ZM400A-APF cool, which should do wonders for noise levels, but will probably result in higher case temperatures. The rear exhaust fan is temperature-controlled, which should make the ZM400A-APF even quieter when you’re listening to MP3s.
To make up for its lack of a second internal fan, the ZM400A-APF is heavily vented to facilitate air flow. Will it be enough? We’ll see in a minute.
Zalman doesn’t sheath the ZM400A-APF’s motherboard power connector, which is a little disappointing. The unit really needs cables like those found on Antec’s TrueControl if Zalman wants to keep up the black motif.
As for cable lengths, the ZM400A-APF offers 20″ motherboard and Molex cables. For most applications, 20 inches should be long enough, but the ZM400A-APF may not have enough reach for RAID arrays mounted at the bottom of full-tower or double-wide cases.
Breaking from the zip tie crowd, Zalman includes four Velcro cable binders with the ZM400A-APF. It would have been nice if the Velcro were black, but at least it’s reusable. Zalman also throws in a Molex splitter that can be used to power all manner of three-pin auxiliary fans. Unfortunately, those fans won’t be temperature-controlled like the ZM400A-APF’s exhaust port.
All tests were run three times, and their results were averaged, using the following test systems.
|Processor||AMD Athlon XP 3200+|
|Front-side bus||400MHz (2x200MHz)|
|Motherboard||DFI LANParty NFII Ultra|
|Chipset||NVIDIA nForce2 Ultra 400|
|North bridge||nForce2 Ultra 400 SPP|
|South bridge||nForce2 MCP-T|
|Memory size||512MB (2 DIMMs)|
|Memory type||Corsair XMS3200 PC2700 DDR SDRAM|
|Graphics||ATI Radeon 9800 Pro 256MB|
|Audio||M-Audio Revolution 7.1|
Maxtor 740X-6L 40GB 7200RPM ATA/133
|Operating System||Windows XP Professional SP1|
Voltage tests were conducted using a Pico ADC-212/3 digital oscilloscope while the test system idled and was under a load consisting of a looped 3DMark03 demo with Folding@Home running in the background. The same idle and load conditions were also used in our noise level and temperature tests.
For noise and temperature testing, a second test system was used, consisting of the following components enclosed in Antec’s Lanboy case with no additional cooling fans other than those on the processor, graphics card, and power supply. A stock cooler for the Athlon XP 2100+ was used.
|Processor||AMD Athlon XP 2100+|
|Front-side bus||266MHz (2 x 133MHz)|
|Motherboard||Tyan Trinity KT400|
|North bridge||VIA VT8377|
|South bridge||VIA VT8235|
|Memory size||512MB (2 DIMMs)|
|Memory type||Corsair XMS3200 PC2700 DDR SDRAM|
|Graphics||ATI All-in-Wonder 9700 Pro|
Samsung Spinpoint SP1203N 7200RPM ATA/133
|Operating System||Windows XP Professional SP1|
Temperature measurements were taken using Motherboard Monitor 5. The Trinity KT400’s integrated temperature sensors and noise levels were measured using an Extech 407727 digital sound level meter. Both noise level and temperature measurements were taken after the system had been idling or under load for 15 minutes. The ambient temperature in the underground benchmarking sweatshop during testing was a steamy 27.5 degrees Celsius, which is a little higher than what I hope most of you have to put up with, but should be a good extreme environment for the power supplies.
Because users can easily manipulate the TrueControl 550W’s voltages, it’s a bit tricky to test. To simulate a likely real-world calibration, the TrueControl’s 3.3, 5, and 12V rails were set as close to 3.3, 5, and 12V as possible using a digital multimeter and the motherboard’s BIOS to verify the voltage on each rail. Since one isn’t likely to manipulate voltages on the fly often (or even at all) once they’re initially set, the TrueControl’s voltages weren’t tweaked after testing began.
We used the following versions of our test applications:
The test systems’ Windows desktop was set at 1024×768 in 32-bit color at a 75Hz screen refresh rate. Vertical refresh sync (vsync) was disabled for all tests.
All the tests and methods we employed are publicly available and reproducible. If you have questions about our methods, hit our forums to talk with us about them.
To test each power supply’s DC voltage tolerance, I measured the DC voltage of the 3.3, 5, and 12V rails using the digital oscilloscope over a five-second time interval. Since none of the power supplies had any significant peaks or valleys over the five-second interval, I’ve presented the average voltage over that time.
On the 3.3V rail, the EG651P-VE(FMA) and TruePower 550W show a noticeable difference between load and idle voltages, but both are within their respective tolerances. The ZM400A-APF nails 3.3V on the dot at idle, while the Ion and SilenX 400W are both quite close.
Zalman’s ZM400A-APF hits the 5V rail perfectly, but all the power supplies are evenly matched and easily within their advertised tolerances. They all show relatively equal voltages under load and at idle, too.
The 12V rail shows a little more variance, but all the power supplies are well within their tolerances.
Overall, it’s a little disappointing to see the TrueControl not nailing the voltages perfectly. Using a digital multimeter and BIOS to set the TrueControl’s voltages isn’t the most precise calibration method, but it’s definitely more accessible than using a $500 oscilloscope. I suspect that the majority of enthusiasts won’t even bother with a digital multimeter and will instead set the TrueControl’s voltages using their motherboard’s BIOS or perhaps Motherboard Monitor to verify the voltage on each rail.
PC power supplies must convert an AC power source to produce DC voltages, but a little bit of AC voltage always sticks around. This “Ripple” voltage is residual effect of the AC-to-DC conversion process, and the less ripple, the better. Because ripple content varied so much in my testing, I’ve included timescale graphs showing the ripple over a 10ms time interval.
It’s easy to see that the Ion 400W has the highest ripple on the 3.3V rail, especially since the other power supplies have similar ripple content. Overall, Enermax’s EG651P-VE(FMA) has the lowest ripple content under load and idling, while both Antecs, the SilenX, and ZM400A-APF are locked in a virtual tie for second place.
The Ion 400W has more ripple than the competition on the 5V rail, too. Again, the ripple content of the other power supplies is very close.
On the 12V rail, the Ion has lots of ripple once again. The other power supplies continue to be closely matched, but the edge is going to have to go to the TrueControl this time around. Barely.
In our system temperature tests, Antec’s TrueControl 550W produces the lowest case temperatures at idle and under load, but only with its fan speed all the way up. Enermax’s EG651P-VE(FMA) produces the second lowest set of temperatures regardless of which fan speed is used, and the TrueControl 550W’s low fan speed setting slots it in fourth place.
Overall, dual-fan power supplies do better in our case temperature tests. However, the Ion’s dual 80mm fans don’t help it run any cooler than the single-fan ZM400A-APF. Interestingly enough, Ahanix’s single-fan SilenX 400W actually produces relatively low case temperatures at idle, but loading the system instantly ramps up temperatures.
The processor temperature test results follow the case temperature results exactly. The dual-fan Enermax and Antec units rule the roost, but are they louder than the single-fan power supplies?
Vantec’s Ion 400W has the lowest noise levels an inch from the top of our Lanboy case. Ahanix’s SilenX is a little louder than the Ion, but not by much. Antec’s dual-fan TruePower and TrueControl 550W units are rather quiet, too, though the TrueControl gets a lot louder with higher fan speeds.
As a single-fan power supply, the ZM400A-APF’s noise levels are a little disappointing. The power supply is relatively quiet at idle, but its temperature controlled fan spins a little louder under load than the competition.
At the rear of the case and outside the direct path of air flow, the power supplies stack up much like they did when we measured at the top of the case. Vantec’s Ion continues to be the quietest of the lot, followed by Antec’s TruePower and TrueControl models. Ahanix’s single-fan SilenX drops a little in the rankings this time around.
To simulate operation in a silent PC, I also connected the power supplies up to a passively-cooled system whose only sources of noise were the hard drive and whatever background noise lurks in my basement suite at 2AM.
With barely any background noise clouding our perspective, the single-fan power supplies are all closely matched. The dual-fan power supplies don’t do too badly here, but Vantec’s Ion is definitely quieter than the others, even with its medium fan speed setting. The high fan speed setting on Enermax’s EG651P-VE(FMA) is louder, but not overbearing. Antec’s TrueControl 550W, though, is almost a Dustbuster at its highest fan speed setting.
Trying to pick a clear winner out of five closely-matched power supplies isn’t easy. To help you sift through everything we’ve covered, I’ll quickly sum up each power supply’s strengths and weaknesses.
- Ahanix SilenX 400W – Ahanix wasn’t a name that I’d commonly associated with power supplies before this comparison, so I didn’t quite know what to expect from the SilenX 400W. With a weaker maximum 3.3V wattage than the competition and the highest system temperatures of the lot, I almost wrote off the SilenX. However, it was the quietest power supply in our isolated noise tests, which makes me think it could be perfect for silent PC projects. The SilenX also has tight DC voltages with low ripple content, so power quality isn’t an issue at all. Unfortunately, the SilenX line doesn’t seem to be widely available. I could only find a couple of retailers selling the 400W model for $99, which seems a little high considering unit’s 400W rating, plain appearance, and lack of extra features.
- Antec TrueControl 550W – The TrueControl 550W takes everything that we liked about the TruePower last year and rolls it up with voltage and fan speed control. Honestly, there’s not much not to like about this power supply, though I do have some reservations about how easy it will be to tweak the 3.3, 5, and 12V lines accurately without expensive equipment to verify the actual voltage on each line. The TrueControl is the loudest power supply in this comparison with its fans cranked all the way up, but that high fan speed setting also kept our system running the coolest, which bodes well for overclockers. Those concerned with noise can always turn down the fan speeds and make the TrueControl much quieter. A price tag of $110 might scare less dedicated enthusiasts away from the TrueControl 550W, and that’s probably a good thing. Newbies shouldn’t be messing around with voltage levels, and they probably won’t need adjustable fan speeds. However, those features are all there for finicky tweakers who demand flexibility.
- Enermax EG651P-VE(FMA) 550W – At $126, the EG651P-VE(FMA) 550W is the most expensive power supply in this comparison, but the unit’s dual sheathed cables, glossy finish, adjustable fan speed, and relatively low ripple voltage nicely justify its higher cost. The EG651P-VE(FMA) also offers more 12V wattage than any other power supply in this comparison, and it cools well without making too much noise. For what it offers, it’s hard to call the EG651P-VE(FMA) 550W overpriced, but it’s definitely overkill for even most enthusiasts. Against its most direct competitor, Antec’s TrueControl 550W, the EG651P-VE(FMA)’s lack of voltage adjustment won’t score points with the hard-core tweaking crowd. However, the power supply’s shiny finish and extra sheathed cable will make case modders swoon, and the massive 12V maximum output wattage could turn even Tim Allen into a computer geek.
- Vantec Ion 400W – Because of its relatively low noise levels and higher system temperatures, the Ion 400W is wedged somewhere between the dual- and single-fan power supplies. Unfortunately, the Ion has the most ripple of any of the power supplies we looked at, and not by a little. The Ion’s saving grace may be its relatively low $64 price tag, which is about $30 less than the next cheapest power supply in this comparison. You get what you pay for. With less ripple content and a slightly higher voltage on the 12V line, the Ion 400W could have been the darling of this comparison. In the end, it still looks like a capable power supply for those looking for a cheap option with a couple of extra features that generic power supplies tend to lack.
- Zalman ZM400A-APF 400W – The stealthy ZM400A-APF was full of surprises in my testing, and that’s a good thing. First, the ZM400A-APF delivered the tightest DC voltage tolerances of the bunch, with relatively low ripple content to boot. The ZM400A-APF also managed lower system temperatures than the other single-fan power supplies in this comparison, albeit while making a little more noise. In the end, it’s the ZM400A-APF’s comparably high $92 price tag and low 12V maximum wattage that sours me on an otherwise capable power supply. It feels like Zalman could have gone a lot farther with the black aesthetic to really cater to modding enthusiasts, too.
- Antec TruePower 550W – The winner of last year’s comparison, Antec’s TruePower 550W turned in an impressive performance, but it’s ultimately made obsolete by the TrueControl 550W. The TrueControl and TruePower 550W are both available online for roughly the same price, but the TrueControl delivers voltage and fan speed tweaking features along with all the TruePower’s sexy dedicated output circuitry.
Personally, I lean towards Antec’s TrueControl 550W, because I’m not a stickler for looks. I’m also probably one of a small percentage of enthusiasts who would actually take the time to properly calibrate voltage lines to perfection. I could be the only one who considers dedicated output circuitry sexy, too, so I realize that the TrueControl has far from universal appeal. In the end, none of the power supplies we looked at today is right for everyone, but using the performance and feature analysis we’ve provided, you should be able to find one that fits your needs.