How much power supply is enough?

xs4amit · Jun 17, 2013

Hi All,

I am just going to build a new system with following specifications:

MOBO: Asus P8Z77 - V Pro
RAM: Kingston Hyperx 1600 DDR3
CPU: Intel i5 3570K
HDD: Seagate 1TB 64MB
Gcard: Asus GTX 660 2GB
No optical drive

Please tell how much power supply is sufficient for this build. For gaming

ksham · Jun 17, 2013

A quality 400-450W PSU is sufficient for that build. But I would recommend a XFX 550W in case you plan to SLI in the future or buy a stronger GPU later.

TheBigTroll · Jun 17, 2013

-get a cheaper board like the z77-v LK. they overclock the same and contains enough features to get going
-get 1600mhz cl9 1.5v ram. kingston ram is bad for intel systems unless they are the 1.5v editions (which id still wouldnt get due to their high cost)
-with the saved money, buy yourself a 7870xt

a good xfx 550w for around 50 bucks will do it for you

xs4amit · Jun 18, 2013

ksham :

Hey friend,

I don't want to SLI in future. I hope 450 watt would be enough for this build, as you suggested.

ksham · Jun 18, 2013

Depends on the PSU. I said a quality 450W PSU. Not all PSUs are created equal.

SamGriffiths · Jun 18, 2013

xs4amit :

Hey, what's your budget? We might be able to fiddle it to get a HD 7870XT or even a HD 7950. But as it is the 7850 is cheaper and has almost the same performance as the the GTX 660 and it's overclocks like a champ, http://pcpartpicker.com/part/asus-video-card-hd7850dc22gd5v2. + with that cooler on it, it will be a lot quieter than the reference GTX 660.

ksham · Jun 18, 2013

The GTX 660 is clearly better than a HD 7850, so the performance level is not the same.

SamGriffiths · Jun 18, 2013

ksham :

Want to show any benchmarks to back that up?

http://gpuboss.com/gpus/Radeon-HD-7850-vs-GeForce-GTX-660
Says they're equal.

https://www.youtube.com/watch?v=sXzPs6VA6ik
Watch the FPS, they both go higher and lower than each other, if I were to guess a ruff average the 7850 is 5 FPS slow.

And of course if he was going to get a reference cooled GTX 660 it wouldn't OC half as well as the DCII 7850.

tiny voices · Jun 18, 2013

http://anandtech.com/bench/Product/783?vs=778

The gtx660 and hd7850 are basically equal.

It could be said that the gtx660 is 3-5% better. In particular games.

ksham · Jun 18, 2013

gpuboss is not a reliable source.

SamGriffiths · Jun 18, 2013

ksham :

Neither is a random graph with no testing method or source at all.

ksham · Jun 18, 2013

@SamGriffiths: It is not random. It came from techpowerup. They ran tests on 18 games and that chart is the average in all resolutions. More reliable than GPUBoss. They don't run benchmarks at all.

Read it yourself: http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_780/

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How much power supply is enough?

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