The big Haswell PSU compatibility list

For a few weeks now, we’ve known that Intel’s Haswell processors feature a new sleep state that isn’t compatible with all power supplies. Haswell’s sleep power draw is substantially lower than that of previous generations, and it can trigger some PSUs’ under-voltage protection and force a system reset.

Corsair described the problem more elaborately in an e-mail to us, which reads:

According to Intel’s presentation at IDF, the new Haswell processors enter a sleep state called C7 that can drop processor power usage as low as 0.05A. Even if the sleeping CPU is the only load on the +12V rail, most power supplies can handle a load this low. The potential problem comes up when there is still a substantial load on the power supply’s non-primary rails (the +3.3V and +5V). If the load on these non-primary rails are above a certain threshold (which varies by PSU), the +12V can go out of spec (voltages greater than +12.6V). If the +12V is out of spec when the motherboard comes out of the sleep state, the PSU’s protection may prevent the PSU from running and will cause the power supply to “latch off”. This will require the user to cycle the power on their power supply using the power switch on the back of the unit.

Since the news broke, a number of PSU vendors have indicated which of their power supplies fully support Intel’s new processors. We covered some of those announcements, but keeping track of all of them has been difficult. In an effort to be thorough—and, you know, to make things easy for everybody—we’ve spent a few hours compiling compatibility information from all the major PSU vendors.

Before we proceed, we should be clear about one thing: you don’t, strictly speaking, need one of these “Haswell-ready” PSUs to build a Haswell system. Corsair told us that it “fully expects” motherboard makers to let users disable the new low-power power state in the firmware. Cooler Master went even further, stating that, to its knowledge, “all mainboard vendors” will disable the new low-power state in their boards by default. In other words, you may never encounter any issues even if you pair a Haswell platform with an incompatible power supply.

That said, Haswell’s lower-power sleep state is one of the perks of the new platform. Compared to the prior generation, it cuts minimum sleep power consumption from 6W to about 0.6W. Those kinds of power savings may not add up to much on your power bill, and they probably aren’t worth the price of a brand-new PSU. However, if your current unit is already compliant, you might as well enjoy the reduction in sleep power. Also, of course, folks building a Haswell system from scratch are better off getting a compatible unit to begin with.

So, without further ado, here’s our big, non-exhaustive list of Haswell-ready power supplies. The information comes directly from PSU vendors, and we’ve included links to the source announcements in case you want to double-check. You can skip ahead to each PSU vendor’s section through this handy index:

…or you let your scroll wheel run wild and go through all the purdy lists below. Whatever floats your boat.


* * *


According to Antec, the following units are “fully compatible” with Haswell:

  • EarthWatts Green: EA-650 Green
  • EarthWatts Platinum: EA-450, EA-550, EA-650
  • High Current Game: HCG-750, HCG-900
  • High Current Gamer M: HCG-520M, HCG-620M, HCG-750M, HCG-850M
  • High Current Pro: HCP-750, HCP-850, HCP-1200
  • High Current Pro Platinum: HCP-1000 Platinum, HCP-850 Platinum (OC link), HCP-1000 Platinum (OC link), HCP-1300 Platinum (OC link)
  • NeoEco C: Neo Eco 620C
  • Signature: SG-650, SG-850
  • TruePower Gold: TP-550G, TP-650G
  • TruePower New: TP-550, TP-650, TP-750, TP750 Blue
  • TruePower Quattro: TPQ-850, TPQ-1000, TPQ-1200, TPQ-1200 OC
  • VP: VP550P V2, VP650P V2, VP650PM
  • VP F: VP550 F, VP630 F

However, the compatibility of these units “has not been confirmed yet”:

  • BP: BP-350, BP430, BP500U, BP550 Plus rev 1
  • EarthWatts Green: EA-350 Green, EA-430 Green, EA-500 Green, EA-750 Green
  • High Current Game: HCG-400, HCG-520, HCG-620
  • High Current Gamer M: HCG-400M
  • NeoEco C: Neo Eco 400C, Neo Eco 450C, Neo Eco 520C
  • VP: VP350P, VP450, VP450P, VP550P
  • VP F: VP450 F


* * *

Cooler Master

The following Cooler Master units are all listed as “Haswell-ready.”

  • V Series: V700, V850, V1000
  • Silent Pro Platinum: 550W, 1000W
  • Silent Pro Gold: 450W, 550W, 600W, 700W, 800W, 1000W, 1200W
  • Silent Pro Hybrid: 850W, 1050W, 1300W
  • Silent Pro M2: 420W, 520W, 620W, 720W, 850W, 1000W, 1500W
  • Silent Pro M: 500W, 600W, 700W, 850W, 1000W
  • GX2: 450W, 550W, 650W, 750W
  • GX: 400W, 450W, 550W, 650W, 750W
  • GXL: 500W, 600W, 700W
  • i Series: i500, i600, i700
  • G Series: G500, G600, G700
  • Thunder M: 420W, 520W, 620W
  • Thunder: 450W, 500W, 600W, 700W
  • B500, B600, B700
  • EX2: 475W, 525W, 625W, 725W
  • EX: 350W, 400W, 460W, 500W, 550W, 600W, 650W, 700W
  • Elite: 350W, 400W, 460W

Cooler Master also proposes a workaround for PSUs that may lack support:

Should customers experience problems nevertheless, or would like to enable the advanced power saving mode on older power supplies that might not support it, there is a simple fix. Simply adding a single silent case fan to the system, connected to the power supply, should provide enough additional load to keep the system running in advanced power saving mode. The only disadvantage would be that power savings in idle mode on such a system would only surmount to around 2-3W instead of ~5W.

Hmm. Interesting.


* * *


All power supplies that use DC-to-DC conversion to power their 3.3V and 5V rails have no problem with Haswell’s new low-power state, Corsair says. The following Corsair power supplies all use DC-to-DC conversion and are listed as “100% compatible with Haswell CPUs”:

  • AXi: AX760i, AX860i, AX1200i
  • AX (Gold and Platinum): AX650, AX750, AX760, AX850, AX860, AX1200
  • HX (Silver, Gold and HX1000): HX650, HX750, HX850, HX1000, HX1050
  • TX-M (All Versions): TX550M, TX650M, TX750M, TX850M, TX950M
  • TX (All Versions): TX550, TX650, TX750, TX850, TX950
  • GS (Current V3): GS600, GS700, GS800
  • GS (Legacy V1): GS600, GS700, GS800
  • CX-M: CX750M
  • CX: CX750
  • VX: (Legacy) VX550

The ones in this second list are marked as “likely compatible” but “currently validating.” Corsair explains that it’s “still working with Intel on the details of the testing methodology they use to check PSUs for Haswell compatibility.”

  • HX (Legacy Bronze and below): HX450, HX650, HX520, HX620
  • GS (Legacy V2): GS500, GS600
  • GS (Legacy V1): GS500
  • CX-M: CX430M, CX500M, CX600M
  • CX: CX430, CX500, CX600
  • VX (Legacy): VX450
  • VS: VS350, VS450, VS550, VS650


* * *


Enermax claims all of its current mid-range and high-end PSUs, as well as some older models, use DC-to-DC conversion and can therefore pump out “rock-stable voltages even at 0W load.” Here’s a list of them:

  • Platimax: 500W, 600W, 750W, 850W, 1000W, 1200W, 1500W
  • Revolution87+: 550W, 650W, 750W, 850W, 1000W
  • MaxRevo: 1200W, 1350W, 1500W
  • Triathlor: 385W, 450W, 550W
  • Triathlor FC: 550W, 650W, 700W
  • Revolution85+: 850W, 920W, 950W, 1020W, 1050W, 1250W
  • Modu87+: 500W, 600W, 700W, 800W, 900W
  • Pro87+: 500W, 600W


* * *

OCZ/PC Power & Cooling

The following OCZ/PC Power & Cooling units use DC-to-DC conversion and are marked as “Haswell ready” by the company:

  • Mk III Silencer: PPCMK3S1200, PPCMK3S850, PPCMK3S750
  • Mk II Silencer: PPCMK2S950, PPCMK2S750, PPCMK2S650
  • Fatal1ty Gaming Series: OCZ-FTY1000W
  • ZX Series: OCZ-ZX1250W, OCZ-ZX1000W, OCZ-ZX850W
  • Z Series (EOL): OCZZ1000M, OCZZ85M


* * *


Seasonic lists these units as “ready for Intel’s Haswell processors,” although it doesn’t go into much detail beyond that:

  • X-series: 560W, 660W, 760W, 650W, 750W, 850W, 1050W, 1250W
  • X-series Fanless: 400W, 460W
  • Platinum Series: 660W, 760W, 860W, 1000W, 1200W
  • Platinum Series Fanless: 400W, 460W, 520W
  • G-Series: 360W, 450W, 550W, 650W
  • M12II Bronze: 650W, 750W, 850W


* * *


As far as I can tell, Silverstone didn’t even put up a press release. It simply listed compatible units in a PDF titled, “SilverStone PSU for Haswell support list:”

  • Strider Gold Evolution series: ST75F-G Evolution, ST85F-G Evolution, ST1000-G Evolution, ST1200-G Evolution
  • Strider Gold series: ST55F-G, ST65F-G, ST75F-G, ST85F-G, ST1000-G, ST1200-G
  • Strider Gold S series: ST75F-GS, ST85F-GS
  • Strider Plus series: ST50F-P, ST60F-P, ST60F-PS, ST75F-P, ST85F-P, ST1000-P, ST1500
  • Strider Essential Series: ST50F-ES230, ST40F-ES, ST50F-ES, ST60F-ES, ST70F-ES
  • Nightjar Series: ST40NF, ST50NF
  • Gemini Series: ST30GF, ST42GF, ST50GF, ST55GF
  • SFX Series: ST30SF, ST45SF, ST45SF-G
  • Zeus Series: ZM1350
  • Other: ST60F-SG, FSP300-60GHS


* * *


According to Thermaltake’s compatibility announcement, “most high-end power supplies of Thermaltake are fully compatible with Haswell CPUs.” The compatible units are as follows:

  • Toughpower Grand (Platinum): 600W, 700W
  • Toughpower Grand (Gold): 650W, 750W, 850W, 1050W, 1200W
  • Toughpower XT: 1275W, 1375W, 1475W
  • Toughpower: 750W, 850W, 1000W, 1200W, 1500W
  • Evo_Blue 2.0: 650W, 750W, 850W
  • Smart M: 750W, 850W


* * *


Here’s the word from XFX on Haswell compatibility:

XFX power supplies use a +12V design that allows for a minimum of 0A so they will not have an issue with the new low power sleep states allowing the CPU to enter deep sleep mode without any problems. XFX manufacturing partner Seasonic in conjunction with Intel have worked together to confirm that all XFX Pro Series PSUs listed below are compatible with Intel’s new 4th generation Core processor family for new CPU upgrades to current systems and future new builds.

And here’s the compatibility list:

  • Pro Series Core Edition: PRO650W, PRO750W, PRO850W
  • Pro Series XXX Edition: PRO650W, PRO750W, PRO750W, PRO850W, PRO850W
  • Pro Series Black Edition: PRO750W, PRO850W, PRO1050W, PRO1250W
  • Pro Series Black Edition: Limited PRO1000W

The firm adds that its XFX Pro Series 450W and 550W units are not Haswell-ready. However, XFX is “working closely with Seasonic to develop a new 550W Gold Pro Series PSU that will be compatible later this year.”


* * *

Comments closed
    • BIF
    • 9 years ago

    If casual Google readers don’t “get it” and they’re too lazy to peruse the comments section, then it’s just their tough luck.

    Even Perry White never tried to rewrite Clark Kent’s articles. No need to backseat drive this one over a difference that is really only a fraction of a degree. 🙂

    • reb0rn
    • 9 years ago

    I just bought i5 4570 and Chieftec BPS 750w c2 PSU, i have problem with the post, CPU defect light is red, and i need to power up 6-7 times with PSU switch off/on few time to make it post, after booting fine whole system work fine (full load, ect) so just power on is problem

    each time i have problem booting bios say Overclock failed after a successful power on (i did not overclock) disabling C6 and C7 did not help

    I am now using old LC hyperion 700w just fine

    Also tested chieftec BPS on Sandy Bridge and it posted dozen of times just fine

    To me this look like Haswell PSU problem

    • MarkG509
    • 9 years ago

    I didn’t see any mention of a PicoPSU. But, I can report that a PicoPSU 160XT seems quite happy in my Haswell build:
    I7-4770S (no over- or under-clocking)
    ASRock Z87E-ITX (removed the wireless module since I wasn’t using it)
    2x Crucial Ballistix Tactical 8GB Cas 8 1.35V BLT8G3D1608ET3XL0
    2x Crucial M4 CT256M4SSD2 256GB
    Noctua NH-L12 (only using the top 120mm fan)
    PicoPSU 160XT with 192W 12V AC-DC (Kit from minibox)
    Fractal Design Node 304 (only rear fan connected, stuffed the brick inside the box).
    USB Keyboard and mouse.

    If you believe a 10 year old Seasonic Power Angel (similar to a Kill-a-Watt), after boot settles down, it idles down to about 14W at the Linux Mint 15 Mate desktop, before the screensaver kicks in.

    • oldDummy
    • 9 years ago

    Thanks for the update, lot of work/general PITA.
    know why the CX-430 was on sale now.
    Still a nice price,
    We shall see…..eventually.

    • ColeLT1
    • 9 years ago

    A “report spam” button would be nice, would prevent gaming of a vote-to-ban system.

    • Chrispy_
    • 9 years ago

    Where’s the [s<]citizen's arrest[/s<] vote-to-ban button? Thumbs up, Thumbs down, Little banhammer icon.... 😉

    • LauraLasher43
    • 9 years ago
    • spuppy
    • 9 years ago

    Exactly! The worst part is, it seems like the tech sites are being manipulated by the PSU companies to post this kind of information. That’s really why I want to get to the bottom of it… Are there any instances of C6/C7 causing even the cheapest garbage PSUs to crash?

    • Alexko
    • 9 years ago

    Any chance you might get information from Fortron? I really like my Aurum and would like to keep it.

    • Kaleid
    • 9 years ago

    Anybody know about Silver Power SP-SS750M 750w? Supposedly made by Seasonic..

    • slaimus
    • 9 years ago

    I guess I have been out of the power supply scene for too long, as my Antec 550W NeoHE has been working fine for a long time.

    Has power requirements increased so much recently that the average power supply is now around 650W? The reviews seems to indicate that most hardware has actually been using less power than before.

    • Waco
    • 9 years ago

    I was under the same impression. Most modern “multi-rail” PSUs convert from AC down to 12v with a single larger rail that just has multiple “rails” with separate protection circuitry.

    This does seem like a cash grab more than anything else especially since the deep sleep states are disabled by default and because any other components will draw enough to keep even the lowliest of modern PSUs happy.

    • Chrispy_
    • 9 years ago

    Thanks guys.

    On another note, can you (when you get a chance) compare the energy use at the wall socket of a machine using Haswells C6/C7 sleep states, and then disabling that in the BIOS and reverting the the C3 sleep state that you’d need to run with an “incompatible” PSU.

    Call me a cynic, but this sounds like a marketing plan to push new PSUs on people when in actual fact an older PSU will only cost $0.04 a month more to run….

    • Farting Bob
    • 9 years ago

    Yes i do, but you are making the issue seem far more important than it is. If your current PSU is not on this compatibility list, that doesnt mean you need a new PSU. But calling it a compatibility list kinda implies just that. The regular folk reading your (very good) articles on a daily basis know the difference, but someone just hitting up a google search and stumbling onto this page are less likely to read the reasonably in depth writing in the article and skip straight to the list.

    • spuppy
    • 10 years ago

    Even with 2 rails, they are both converted from AC at the same point aren’t they?

    I don’t want to be ‘that conspiracy guy’ but to me this seems like not much more than a reason to put a “Haswell Compatible” sticker on the box. Since pretty much every PSU is compatible anyway…

    I would like to hear how I am wrong though, so to everyone out there who is smarter than me: help me out here!

    • Cyril
    • 10 years ago

    You guys pointing this out (you and Farting Bob) do realize that I explained all this up front in the article, right? 🙂

    • Krogoth
    • 10 years ago

    Minor nitpick, this is the compatibility list of PSUs for Haswell’s new power states. Haswell will work any ATX12V that delivers sufficient current on the 12V rail.

    Motherboard vendors are going to set their BIOS/UEFI to S3 by default to be on the safe side and put a disclaimer in their manuals when you try to use the new power states.

    The whole PSU issue with new power states is a non-issue for 99% of the market.

    • Star Brood
    • 10 years ago

    I don’t 😉

    • just brew it!
    • 10 years ago

    Some PSUs put the CPU power connector on a separate +12V rail from the rest of the +12V plugs.

    Also, with all the emphasis on system power efficiency these days there’s more of a tendency to put components into sleep mode when the system is idle. So if the PSU has some minimum load below which it becomes unhappy, you’re more likely to hit it.

    • Vivaldi
    • 10 years ago

    TR have I told you lately I love you? Class.

    • just brew it!
    • 10 years ago

    [quote<]The ones in this second list are marked as "likely compatible" but "currently validating." Corsair explains that it's "still working with Intel on the details of the testing methodology they use to check PSUs for Haswell compatibility."[/quote<] Likely translation: They didn't pass the first time around, but Corsair is convinced Intel's test methodology is flawed, and is arguing with them to get them to change the pass/fail criteria.

    • indeego
    • 10 years ago

    Why have it on your feedly then?

    • tay
    • 10 years ago

    Not only that, but I am under the impression that these low power states are only supported by a handful of SKUs that do not include desktop chips.

    Look at the bottom of this page.

    [url<][/url<] TR should remove this article.

    • glacius555
    • 10 years ago

    Interesting. Mine is just Antec EA 650, so no idea if it is compatible..

    • cynan
    • 10 years ago

    While I agree that this is excellent work by TR putting this all together, I do also agree that this whole issue is not really much of one. And it does seem like something propagated by PSU vendors to try and drum up a few extra PSU sales…

    With this and the related stories about individual vendors over the past few weeks, this topic must be in the running for most reported/least impactful of all time at TR.

    • Waco
    • 10 years ago

    This is what I don’t get and I wish someone could explain why this is an issue on any system with ANYTHING connected to the PSU aside from the motherboard.

    Even then, most motherboards draw a decent amount of power even when in sleep states…

    • windwalker
    • 10 years ago

    This is a good idea and I appreciate the effort, but this is something web shops should have a filter for.
    Tedious stuff like cross checking lists is exactly why we have computers for, after all.

    • Farting Bob
    • 10 years ago

    I don’t think “compatibility list” is the best term to use. Most PSU’s are compatible with a Haswell CPU, it’s just some older/cheaper ones may have to disable (or just not enable as the case seems to be mostly) the option for the super low sleep state.

    I know PSU makers will just say “only these PSU’s are compatible with new Intel CPU’s!” because they are trying to sell new hardware, but in reality it’s a minor feature which doesn’t really effect desktops nearly as much as laptops and “compatibility list” just propagates the idea that people will need to buy a new PSU if they get a new processor which is not true.

    • Star Brood
    • 10 years ago

    TR: Quality reporting. This is the only tech news site I come to visit. Everything else gets put on the Feedly backburner (which rarely gets read).

    • chuckula
    • 10 years ago

    Thanks for doing the legwork in putting this list together in a single place!

    • spuppy
    • 10 years ago

    I still don’t get why this is a … thing… Yes the CPU goes down to 0.05A on the 12V rail, but there are plenty of other things drawing current from that rail! Video cards of course… mechanical hard drives… anything with a yellow PSU cable attached to it basically.

    How is it that a CPU going from 0.5 to 0.05A makes this difference with other hardware drawing on the same rail.

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