power requirement for 4x 290x gpu

thelivingflesh · Jul 19, 2015

Hello,
i need advice on selecting psu (as budget friendly as possible)

following components are installed:

4770k Oced to 4.5ghz
16gb oced to 2400
4 x 290x Oced a bit
thermaltake water 3.0 ultimate
1 x ssd
9 x 3tb ssd hardisks

ive took 2 cards out as currently i got a 800watt psu.
i was looking at 1000watt xigmatec.
what is the min psu required?

Update: Mobo is a gigabyte z87 x oc force!
I am getting a pretty good deal on the xigmatec 1000watt!

JackNaylorPE · Jul 19, 2015

http://www.guru3d.com/articles_pages/msi_radeon_r9_290x_gaming_oc_review,9.html

800 watts + 2 x 287 = 1374

Guru3D has a 235 watt CPU, take 100 off for your 4770k and 1274

http://www.newegg.com/Product/Product.aspx?Item=N82E16817438011

After that you are well out of "budget friendly area"

Because you have 4 cards, you won't be able to pull max wattage out if them. If you can run 2 with an 800 watter.... then 4 works with 1350 or so. I'd invest in one of these

http://www.homedepot.com/p/Unbranded-Kill-A-Watt-Electricity-Monitor-P4400/202196386

1. Measure wattage at the wall .... multiply by your PSU wattage to get PSU output,

2. Now take 1 card out and do the same, multiply again to get PSU output.

3. Subtract the 2 to get card wattage.

Take the wattage from step 3, multiply by 2, and add to wattage from step 3.

MarkW · Jul 19, 2015

Toms reviewed the R9 290X: Max power was in the extreme test was 295 watts. So lets just round that up to 300 watts. Max power in a game was 218 watts. Im going to go with 250 watts on this, as some game probably will come along and push the card harder than Metro did.

http://www.tomshardware.com/reviews/radeon-r9-290x-hawaii-review,3650-29.html

So I assign 200 watts to the base computer system. That is enough to cover the power most systems will use, excluding video cards.

In the extreme test scenario:
- You are looking at 4 x 300 watts which is 1200 watts.
So a potential load of 1400 watts, and you never want to run the power supply at anywhere near 100% load, so I would say a 1600 watt power supply.

In the highest draw in a game scenario:
- You are looking at 4 x 250 watts which is 1000 watts.
So a potential load of 1200 watts, and again you never want to max these out, so I would go with at least 1400 watts, and still think 1500 would be better.

At these loads, you want to play it safe. Overload something pushing out this kind of power, and it will get ugly very, very quickly.

Ryarwood99 · Jul 19, 2015

The wattage you'll need and budget friendly do not fit together

Ryarwood99 · Jul 19, 2015

according to eXtreme power supply calculator you'll need 1605w (without your OC'd) at peak load.

USAFRet · Jul 19, 2015

At a potential 1600 watts, you're right at the edge of what your wall socket will provide.

Now let's add a couple of monitors, a lamp or two, liquid cooling pumps, some pumping audio....
What was that? Aw crap...circuit breaker again...

JackNaylorPE · Jul 19, 2015

I got 1400 watts here.

http://extreme.outervision.com/PSUEngine

However....2 things:

1. Don't expect that significant performance increase as, unless you have MoBo w/ PLX, your cards will will be limited to x4 while now you are at x8

2. At x4 you won't draw close to full power.

thelivingflesh · Jul 19, 2015

Dang!
well i think this one will do then!

http://www.newegg.com/Product/Product.aspx?Item=N82E16817153154

by a budget friendly i meant under under 250$

JackNaylorPE · Jul 19, 2015

I wouldn't go there ... low build quality rating

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=301

I'd say get the P2 1600 but at x4 I don't think you will pull 1300. Can your MoBo do x8 x8 x8 x8 ?

jerdle · Jul 19, 2015

A good 1500W PSU will be plenty. Though there's really no point in going above Tri-Fire.

JackNaylorPE · Jul 19, 2015

Especially on Z97 .... at only X4 can't pull that much thru the interface so performance and power will be way down.

thelivingflesh · Jul 19, 2015

JackNaylorPE :

http://www.guru3d.com/articles_pages/msi_radeon_r9_290x_gaming_oc_review,9.html

800 watts + 2 x 287 = 1374

Guru3D has a 235 watt CPU, take 100 off for your 4770k and 1274

http://www.newegg.com/Product/Product.aspx?Item=N82E16817438011

After that you are well out of "budget friendly area"

Because you have 4 cards, you won't be able to pull max wattage out if them. If you can run 2 with an 800 watter.... then 4 works with 1350 or so. I'd invest in one of these

http://www.homedepot.com/p/Unbranded-Kill-A-Watt-Electricity-Monitor-P4400/202196386

1. Measure wattage at the wall .... multiply by your PSU wattage to get PSU output,

2. Now take 1 card out and do the same, multiply again to get PSU output.

3. Subtract the 2 to get card wattage.

Take the wattage from step 3, multiply by 2, and add to wattage from step 3.

that way i need aprox 1400watts. i had the xigmatec 1000watts but i guess that wont cut it for long!

thelivingflesh · Jul 20, 2015

jerdle :

i need quad to test out driver development. thermaltake 1475 watt is 1 option but ratings are pretty low!

thelivingflesh · Jul 20, 2015

MarkW :

Toms reviewed the R9 290X: Max power was in the extreme test was 295 watts. So lets just round that up to 300 watts. Max power in a game was 218 watts. Im going to go with 250 watts on this, as some game probably will come along and push the card harder than Metro did.

http://www.tomshardware.com/reviews/radeon-r9-290x-hawaii-review,3650-29.html

So I assign 200 watts to the base computer system. That is enough to cover the power most systems will use, excluding video cards.

In the extreme test scenario:
- You are looking at 4 x 300 watts which is 1200 watts.
So a potential load of 1400 watts, and you never want to run the power supply at anywhere near 100% load, so I would say a 1600 watt power supply.

In the highest draw in a game scenario:
- You are looking at 4 x 250 watts which is 1000 watts.
So a potential load of 1200 watts, and again you never want to max these out, so I would go with at least 1400 watts, and still think 1500 would be better.

At these loads, you want to play it safe. Overload something pushing out this kind of power, and it will get ugly very, very quickly.

any specific model you suggest...i dont wanna spend more than 300$ on the psu!

thelivingflesh · Jul 20, 2015

JackNaylorPE :

thats what i was thinking, since all cards will be at 8x power draw should be under 1200! i think the mobo has plx chips already! its a z87x oc force . gigabyte!

MarkW · Jul 20, 2015

Those plex chips get pretty warm by themselves. I wonder what kind of power they draw?

JackNaylorPE · Jul 20, 2015

thelivingflesh :

I'd bet you don't.....

Using the same references me and everybody else is using here, my system is supposed to have a PSU output of 792 watts. I have twin 780s with a 26% OC and they don't draw anything near that. I pull about 745 watts from the wall with two 23 watt water pumps..... so figure 700 watts ... at 87% efficiency, that's 609 watts **in reality"

The 290x pulls about 50 more watts per card at stock but overclocked they are much closer considering the poor overclocking headroom. That's why I suggest that you take the time to actually measure it. I bet it's getting no where near 800 .... to put out 800, you'd need to be pulling about 920 watts from the wall. I don't think you are.

thelivingflesh · Jul 20, 2015

is it possible to keep 1 x 1000 watt psu and add another 700watt psu for the 2 cards///

power requirement for 4x 290x gpu

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