7970 PSU limitations

[DanUre]

As with many people today. I'm tempted with the deal on the 7970 Matrix.

However, what sort of issues would I have with my current PSU.

http://www.overclockers.co.uk/showproduct.php?prodid=CA-055-OC.

The 7970 requires 2x 8pin power connectors.

My PSU states it has 1 x 6pin & 1 x 6+2pin. Is there such a thing as a 6 to 8pin converter or am I clutching at straws?

Cheers

 

[kefan77]

http://www.overclockers.co.uk/showproduct.php?prodid=CB-033-AK

but it only carries 75W afaik.

 

[DanUre]

Aha! And what about the wattage on the PSU itself? I'd like the option to OC if possible

 

[kefan77]

I think you have a good excuse to upgrade the PSU for something more efficient, quieter and modular.

You need to feed tons of power to a beast of a video card like this,
so ASUS equipped the card with two 8-pin PCIe power connectors. Assuming
the card can pull the proper 150W from the PCI Express 3.0 slot and
each of the 8-pin power connectors it means that this card has 450W of
power going to it. Due to this ASUS suggests a 650W power supply with a
+12V current rating of 42A for proper operation of the entire PC. ASUS has a pair of LED lights under each PCIe power connector.

yours has 38A on the 12V

 

[DanUre]

Yeah I had a feeling it wouldn't make the cut. Time to make some decisions...

 

[Mythr1l]

Was wondering about this today, would my 520w Antec HCG be enough to run the asus 7970 on a 4670k system?

 

[swampy]

Hi
I have a i7 4770k asus 7970 top ...8gb ram.. 2 hard drives and a Asus essence STX sound card running fine with seasonic 520 psu
this one.. http://www.overclockers.co.uk/showproduct.php?prodid=CA-038-SS&groupid=701&catid=123&subcat=2383
My psu is the same ie only has one pci-e 8 pin and one 6 pin pci-e power cable for gpus just like yours , with the asus graphics card I got a free 6 pin to 8 pin adaptor.
So just plug 6 pin into the 6 - 8 pin adaptor cable and use the other 8 pin straight in the card aswell works fine
hope u understand that bit early

 

[kefan77]

the fact that it works now doesn't mean much. you're probably running on stock anyway. that seasonic also has slightly stronger 12V.

 

[swampy]

Yeah I am running stock but have overclocked to 4.3Ghz just to play run some benchmarks my seasonic is a brilliant little psu! ...Think I read somewhere it can give out 800 watts had it for ages ,but I'm ordering the 660 platinum model next week so that should be good.
also changing cases today for a new corsair 750d whoopee! not so happy with the build quality tho not good as lian li ....it have to do now

 

[oceaness]

I think it's irrelevant as your PSU doesn't have sufficient 12v amperage, but just so you know the cable adaptor kefan posted is not what you were looking for.

It converts a 6 pin PCIe power connector to the EPS 12v connector for the motherboards CPU power, not an 8 pin PCIe.

 

[MOOGLEYS]

You need one of these.

http://www.overclockers.co.uk/showproduct.php?prodid=CB-034-AK

Your PSU is a little light on the 12v Amperage though. The 7970 Plat loves voltage It might be ok at stock but tbh I would upgrade your PSU to be safe.