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6970 crossfire worth it? - Page 2

post #11 of 13
The M5A97 Evo is 970 chipset, not 990FX. Given this, it only runs crossfire at x16/x4, where 990fx would do x16/x16, and most other boards (like 990x and some 970) do x8/x8. x16/x16 > x8/x8 > x16/x4. I would not crossfire because a Phenom II quad at stock is definitely going to bottleneck significantly, an x4 lane is going to hamper performance as well, and you will need another PSU. You would basically need a new board, CPU, and PSU just to get the desired performance
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post #12 of 13
You'll definitely need a bigger PSU if you're crossfiring them. For one, 650 watts is fine. I'd go 850 for cross-firing them.
    
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post #13 of 13
Quote:
Originally Posted by Tronic707x View Post
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+ =]
yes the TX750 corsair is good for CF 6970s.

I wouldn't worry about the psu until you are going CF. Just get the 6970 now and you be fine.

as for cpu bottlenecking, I would just OC the cpu, and you be fine. For performance at CF 6970 the games out right now at 1080p won't affect you much. For example even if your cpu did bottleneck right now so what? If you are maxing out a game at 1080p with constant 60 fps compared if you had a i5-2500k at 75-80 fps would you lose sleep over that? You still able to enjoy your game at constant fps at max settings at 1080p I personally care more if I can max out everything at 1080p and play at a playable constant fps then having crazy benchmarks over 85 fps which I really don't care much about. I personally buy a computer to play games I like at maximum settings and not to care about bottlenecking or benchmarking.

So for an upgrade route this is what I do:

1. 6970
2. second 6970 + 750 watt psu
3. when the time is needed to utilize 100% of your CF 6970s then upgrade your cpu, don't bother getting the 8150, use the money towards CF 6970/psu

Edit: BTW you got an awesome computer, the only 'bottlenecking' you have is your GPU LOL. Kingston hyper X 250 gb SSD... wow after checking out your sig rig... I am sure you got the funds to do whatever you like LOL.
Edited by mcc21 - 10/21/11 at 9:45pm
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