Power Supply Calculator

[rhema83]

The second link (eXtreme calculator) is very updated. My system is 263W at 100% TDP for CPU and 100% system load. I guess I don't need a 500W Antec after all.

[Kevin]

I have a 400W it's good ?

[morphine]

If it's relatively recent and of a name brand, then you'll get stable 400W. If it's a whitebox, then when you load it up above 50% (ballpark), it's going do either or both of:

- Not give you 400W and crash and burn.
- Not give you a stable 12V and you'll get lots of system instabilities.

Nevertheless, if it's working, it's working.

[gwzap]

I wanted to post a more recent psu calc link....one that has at least most of the pc parts that you buy today. (June, 2008)

http://www.extreme.outervision.com/psuc ... orlite.jsp

Another one, is quite stringent on their requirements. It's from the Asus Site:

http://support.asus.com.tw/PowerSupplyC ... uage=en-us

Gary

[karz]

I'm just a newbie and tends to focus more on the +12V rail(s) where I understand somewhat that most of the power draw is on +12V. I believe it is +12V1 for graphics card, fans and motor drives and +12V2 for processor VRM. I also think the power draw of the rest of the circuits/devices on the lower voltage rails of most typical set ups would never add up to 100 watts (unlike in the olden days where they were more stressed). I also like referring to TR's power consumption test figures because they are obtained on the wall socket w/ hi-tech professional equipment.

Am I doing things right or I would be better off relying on PSU calculators?

[takealready]

This is the psu calculator that I use.
I'm only using 334 watts (though I have a coolmax CUG-950).

http://www.extreme.outervision.com/psucalculatorlite.jsp

[Phimac10]

Check out this calculator too, you can include your OC info.

http://www.extreme.outervision.com/index.jsp

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I try the link above you posted, but is it correct to say that the result is right to say the lease?

[Welch]

I'll have to give this a look... Bare in mind that if these scores are accurate and you score say... 410, you wouldn't' want to use a 420W PSU. The closer and closer you get a system to its PSU's max load the better chance you have of frying something. Also when ran that close to its maximum its going to put off a lot of heat raising your systems temperature. I always shoot for at least 20% headroom, and if you plan to expand the system (More hdds or maybe even a new video card 30-40%!! , I also shoot for supplies that have 80%+ efficiency, cool little guesstimating site though

karz - I would rely on the TR stuff first off, they provide real-world testing on devices in person. The draw from the wall is not what your system is actually using either, this depends on the efficiency of the PSU your using, im sure TR includes this in their reviews and guides when talking about PS units.. they are quite thorough. As for the 12v Rails....... On many top end modular supplies they will have each plug port listed for which 12v rail it runs off of. In addition a few of them will be listed as having 3 or 4 12v rails and 1 of them will be reserved for the CPU plugs, and the others for whatever you plug it into. Hope this helps!