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6970 crossfire worth it?

post #1 of 13
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for my next personal gaming rig i wanna use the radeon 6970 and i was thinking of even crossfiring it but is it even worth the cash or a bigger psu?

sorry i had to write this fast i got school
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post #2 of 13
You'd need a bigger PSU. Also, that Phenom II would bottleneck your setup, and you'd probably get ~70% of the total performance.
    
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post #3 of 13
I've heard that the 69XX series cards scale well in CrossFire, which is why I ordered the 6990 and 6970 (TriFire). It will be overkill for a single display running 1920x1080 though, but will give you loads of head room.
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post #4 of 13
If you got a cooler master 650W PSU I'd upgrade but if it's a corsair you might be able to get by on it. However 6970 CFX is insanely powerful. There won't be a game you can't max + AA. Personally I feel it's worth it. But even a single 6970 you will see a massive performance boost from a GTS 250.
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post #5 of 13
Thread Starter 
Quote:
Originally Posted by JadedFloridian View Post
You'd need a bigger PSU. Also, that Phenom II would bottleneck your setup, and you'd probably get ~70% of the total performance.
how about a 750 watt psu from corsairs enthusiast series? and would a phenom II really be a bottleneck? what if i got an fx 8150 cuz my mb is am3+ =]
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post #6 of 13
Your CPU/motherboard will be your bottle neck. I know mine seem to hold me back.
post #7 of 13
750W would probably be okay, but a 6970 pulls 250 watts at full load under Furmark. If you start overclocking the cards, you'd run into problems pretty quickly I'd imagine.

And yes, it really does bottleneck. I posted a comparison between my old Phenom II and my current i7 in another thread, click here. Looking at that thread, the last comment is talking about 6970 crossfire with a Corsair 750W like you were asking, and the user said he had all sorts of problems until he upgraded to a larger power supply.
    
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post #8 of 13
Thread Starter 
Quote:
Originally Posted by scaz View Post
Your CPU/motherboard will be your bottle neck. I know mine seem to hold me back.
im actually using an asus m5A97EVO 990fx motherboard and what if i oc'd to 4ghz wud it still bottleneck?
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post #9 of 13
Quote:
Originally Posted by Tronic707x View Post
im actually using an asus m5A97EVO 990fx motherboard and what if i oc'd to 4ghz wud it still bottleneck?
Yes, it would. You can't really overclock the Phenom II's high enough to fully break the bottleneck, as they are slower than Intel's offerings, clock-for-clock.
    
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post #10 of 13
750W-800W atleast for dual Cayman XT's.
Get one 6970, then buy the other down the road.

They perform quite well by themselves and its a massive performance upgrade from a GTS 450.
Edited by amstech - 10/21/11 at 9:42pm
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