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HD6950 Power Supply question

Last response: in Graphics & Displays
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June 16, 2011 2:07:04 PM

Hello everyone,

I'm trying to build a computer, this is what I've choosen so far:

Intel® Core™ i5-2500K with Thermaltake Contac 29 BP
MSI P67A-C43 (B3)
G.Skill Kit DIMM 4 GB DDR3-1333 (CL7)

I'm still trying to decide which graphic card to buy and then the powersupply, I was thinking of maybe buying two HD6950 (flash to 6970 if lucky) and crossfire them, so the first question is what kind of powersupply would I need if I wanted to crossfire two HD6950?, the first powersupply I choose was a XFX PRO550W but I guess that's not enough for two cards and also the motherboard I picked at the time was for a single card, which one would you recommend me for about 130€?

Thanks everyone.

edit. I wanted to add that I'm building this computer mostly for upcoming games like BF3.
a b U Graphics card
June 16, 2011 2:22:16 PM

I think you'll need at least an 850w PSU, but since your starting from scratch I'd go with 1000w. I like the NEXT Hale90-1000w for $200
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a b U Graphics card
June 16, 2011 2:26:00 PM

750w from a good manufacturer will be plenty for two 6950's in xfire. I would suggest going with 850w to give yourself more breathing room as to not run the 750w psu at full load all the time.

Go with corsair, antec, OCZ for your psu. On shellshocker deal, I was able to get a 850w OCZ fully modular for $100
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June 16, 2011 3:04:12 PM

Unfortunately I can't buy from newegg so I'm checking some shops from my country (Spain).

With 750W I've found these:

Antec High Current Gamer HCG-750
Corsair CMPSU-750TXV2
OCZ Fatal1ty 750W

All of them are from 95€ to 110€. (about 140$)


And for 850W:

Antec CP-850
Corsair CMPSU-850TXV2

For 120-140€. (170-180$)

I know, prices here are way higher, which one would you recommend me?, I was thinking maybe the Antec CP-850 is the best choice.

Also if anyone can help me with the motherboard I would appreciate it.

Thanks.
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Best solution

a c 358 U Graphics card
a b ) Power supply
June 16, 2011 3:25:58 PM

If you are going with two HD 6950, then I would get the Corsair CMPSU-750TXV2.

It is manufactured by Seasonic; my preferred brand. They are basically in a class of their own when it comes to quality and reliability.
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June 16, 2011 3:41:11 PM

jaguarskx said:
If you are going with two HD 6950, then I would get the Corsair CMPSU-750TXV2.

It is manufactured by Seasonic; my preferred brand. They are basically in a class of their own when it comes to quality and reliability.



So 750W is enough with that one?, would be nice as I would be saving some money.
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June 16, 2011 4:01:35 PM

Quote:
also enermax are tier1 for quality and build.


Checked those, kind of pricy compared to the other ones, too much money for me :( 

Thanks though.
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a c 358 U Graphics card
a b ) Power supply
June 16, 2011 4:05:56 PM

Souzou said:
So 750W is enough with that one?, would be nice as I would be saving some money.


I'm sorry... it was a typo, I meant the 850TV2.
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a c 358 U Graphics card
a b ) Power supply
June 16, 2011 4:06:58 PM

Quote:
also enermax are tier1 for quality and build.


Enermax is great, but I rate Seasonic higher.

:) 
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June 16, 2011 4:30:21 PM

Also, which brand should I choose?, I've noticed that there are several results when looking for a 6950 and the prices vary from 200€ to 300€.

Is Sapphire a good choice?, 1Gb or 2Gb?, can I buy one of 2Gb and the other 1Gb and enjoy the 2Gb?

HD6950 Sapphire 1GB GDDR5 HDMI
HD6950 Sapphire 2GB GDDR5 HDMI
Club 3D HD 6950
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June 17, 2011 5:19:50 PM

Best answer selected by Souzou.
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