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Crossfire 2 Diff 7970 models?

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Was wondering if i can crossfire a my gigabyte 7970 OC windforce 3 with a sapphire 7970 with boost and if it can be done on my psu in system specs?



Thanks
 
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Yes you can do this..
 
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Hmmm! now i cant decide if i want to grab the 7970 boost for 280 or sell mine and grab 290!
 

Wrigleyvillain

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Yes it's supported and plenty have done it (and I might do it myself soon with different 7950s cuz the MSI TF3s are $$ used right now) but I'd still say it's always ideal to have two of the exact same if possible just to help ensure no BS or weird problems. Just be aware you might need to experiment with which card like being in the top slot more and what not though it should and probably will "just work" just throwing the new card in second slot and enabling Crossfire (if it doesn't for you of course).

Were it me I'd probably throw the Sapphire Boost card in the top slot.
 
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So my psu will handle 2 7970s also?
 

Wrigleyvillain

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Yes but it may be close depending on what and how much other hardware as well as voltages. I will be trying 7950 Crossfire (pulls about 500 watts give or take a few) with a 650W which may not end up quite cutting it. Have my old 750W still but it's old and inefficient.

And I think I see why you are doing this now; $239 for that card AR. That's only a few more bucks what used 7950 Twin Frozr's are going for on eBay at present (for some damn reason).
 
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Yes it will work. I'm ruining two 7950s, 3770 @ 4.5 on a Corsair RM 650w
 
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The 7970 OC is voltage locked if its 2.1 revision. It overclocks like shit too. Maybe sell it and buy a 290.
 
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The 7970 OC is voltage locked if its 2.1 revision. It overclocks like shit too. Maybe sell it and buy a 290.

If u mean my 7970 its not voltage locked, i run it at 1150/1650 for gaming though without volt adjustments!

The 7970 i would be buying is used, but main concern is not being the same model, sure itll work but it might end up being a pain in the ass in the end!
Think ill just go with a single 290 for now!
Thanks guys!
 
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Yes, its really the best way to go right now. I'm jealous you have it unlocked, mine is 2.1 and actually probably too low for the stock clocks. I'll probably jump to a 290x in a year or two.
 
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Quick question, can u CF a 7970 non GHZ with a 280x?
 
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Quick question, can u CF a 7970 non GHZ with a 280x?
Maybe. If it doesn't work, you can always flash a Ghz bios to the card.
 
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Last edited:
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Well got my new toy!
IMG_20131126_165405 (1).jpg
 
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