Quad-fire 295X2 System

Junit151 · Sep 3, 2014

This is something that I have wondered for a while. What would happen if someone put four 295X2 cards (four 7990s, for 690s, whatever) into one rig? Would it boot? Would two of them crossfire and the other two work separately? (Productivity applications can benefit from more GPUs without necessarily SLI/CFX-ing them) I have just always wanted to know what would happen.

gear999 · Sep 3, 2014

That may happen without CFXing all four 295X2's. But I doubt there is any PSU strong enough to support such a setup

Jonathan Tyer · Sep 3, 2014

The 295X2 is only able to do 2-way CrossFire

Eduello · Sep 3, 2014

Yeah, it should work for things like bitcoin mining, but games would only be able to use two of those cards. You'd have to run a dual PSU setup to make all of those cards work though.

TechyInAZ · Sep 3, 2014

it's impossible, the graphics cards aren't combatable, hardware and software wise.

However, you can do CrossfireX AND SLI in one rig, just like linustechtips did, he put twin gtx graphics cards in sli and two radeon cards in crossfireX and it worked. However, you couldn't use all of them simultaneously, you had to switch to either the crossfireX or the sli cards.

Junit151 · Sep 5, 2014

Eduello gets it. I am not talking about gaming obviously, but for computing (such as coin mining but not specifically). I didn't know if the drivers could even handle it or your system would just poop out. I have just always wondered that because in theory, one could do it.

logainofhades · Sep 5, 2014

gear999 :

There isn't a PSU capable of handling 4 of them. A 295X2 is 500w by itself. :lol:

PCPartPicker part list / Price breakdown by merchant

Video Card: Sapphire Radeon R9 295X2 8GB Video Card ($1007.57 @ Newegg)
Total: $1007.57
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-09-05 18:42 EDT-0400

DubbleClick · Sep 5, 2014

Dual Corsair AX1500i - why not.

Junit151 · Sep 5, 2014

DubbleClick :

This guy gets it, it isn't about cost or logistics it is about having an almighty amount of computational power! And curiosity

DubbleClick · Sep 5, 2014

Well, two of those beasts would just be usable for background computing, while the other two would take care of display.

Junit151 · Sep 6, 2014

Use them for GPU acceleration when rendering video, you can probably render 4K footage faster than real-time!

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Quad-fire 295X2 System

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Junit151

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