Will a TX750M power x2 7970?

pprest123 · 31 Jan 2013 at 22:11

Hi,

As the title says, will my Corsair TX750M PSU be enough for 2 7970? I already have 1 7970 and I'm considering picking another up, but I'm not sure whether I'll need a new PSU.

At the moment, my TX750M is powering my 3770K OC 4.6GHz at 1.2V, MSI 7970, 1TB SATA3 HDD and Kingston HyperX SSD.

Thanks

panyan · 31 Jan 2013 at 22:12

I reckon it would be a pretty close shave tbh, i wouldnt try it

pprest123 · 31 Jan 2013 at 22:15

panyan said:
I reckon it would be a pretty close shave tbh, i wouldnt try it

What PSU would be ideal for 2 of these cards?

Nickolp1974 · 31 Jan 2013 at 22:22

A good quality 850w should do it.
Like
http://www.overclockers.co.uk/showproduct.php?prodid=CA-097-CS&groupid=701&catid=123&subcat= or a seasonic 850

LtMatt · 31 Jan 2013 at 22:22

It will its the minimum requirement though if you plan to overclock them you might consider a psu with more headroom.

Gregster · 31 Jan 2013 at 22:24

I agree with the others. A close shave and pushing it when over clocked.

pprest123 · 31 Jan 2013 at 22:24

Thanks

ALXAndy · 31 Jan 2013 at 22:27

EVGA are launching their PSUs soon. Very reasonable prices too IMO!

Greeny93 · 31 Jan 2013 at 22:31

I ran 2x 7970's off a similar 750w PSU, left at their stock oc of 1050/1475 (ish)

Ran absolutely fine, though I agree with above - it's a close shave once fully oc'd

I upgraded to a 850 and runs fine.

-greeny-

weehamish · 1 Feb 2013 at 00:10

How much more power does a 7970 use to a 7950?

MOOGLEYS · 1 Feb 2013 at 01:18

I have run 2 x 7950's on my system from a tx750m. With my 2500k or 2700k (rip) at 4.8ghz and gpu's both at 1100/1600 and lots of drives fans etc it was under 500w at the wall.

A TX750M is plenty for your system. You do not need a new PSU.

weehamish · 1 Feb 2013 at 01:23

How to check how much w its using?

MOOGLEYS · 1 Feb 2013 at 01:39

I have a power meter connected between the socket and PC plug. It cost me a fortune and is very accurate. Its the best way to get an accurate measure of power usage rather than crappy tables or guessing.

arc@css · 1 Feb 2013 at 02:05

MOOGLEYS said:
I have a power meter connected between the socket and PC plug. It cost me a fortune and is very accurate. Its the best way to get an accurate measure of power usage rather than crappy tables or guessing.

How much do they cost?

Tonester0011 · 1 Feb 2013 at 07:31

Maxing the voltage sliders on both my 7970s with a 3770k @1.35v took a peak 750w from the wall (3D11 run)

MOOGLEYS · 1 Feb 2013 at 09:46

arc@css said:
How much do they cost?

I have had it a while now, I think it was around £1k ish. It does lots of cool things with electrics...

MOOGLEYS · 1 Feb 2013 at 09:51

Tonester0011 said:
Maxing the voltage sliders on both my 7970s with a 3770k @1.35v took a peak 750w from the wall (3D11 run)

A 750W decent PSU with an %80 efficiency will suck around 900W ish from the Wall so you were well within tolerances even if it seems a bit high to me.

Phixsator · 1 Feb 2013 at 10:33

MOOGLEYS said:
I have had it a while now, I think it was around £1k ish. It does lots of cool things with electrics...

Good thing is you don't have to pay that much for a generic one if you are just a "normal" user. I think I can buy one here in Denmark for around 20-30£ and it uses around 0,5 watt to run and are accurate within 0,3% which would be fine for most I would think.

Gregster · 1 Feb 2013 at 11:00

MOOGLEYS said:
I have had it a while now, I think it was around £1k ish. It does lots of cool things with electrics...

I got mine for a tenner off an auction site. I am not fussed on being that accurate, just so long as roughly close is good enough

MOOGLEYS · 1 Feb 2013 at 11:02

I bought it because at the time I was setting myself up as a self employed electrician. Luckily the RAF decided to extend my service..