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Crossfiring 2 6950s

post #1 of 9
Thread Starter 
Hey guys, Im using my sig rig.

I'm using a 1920x1200 60hz monitor.

I wanted to see if you guys think I would see much improvement if I got a 2nd 6950 for BF3 for this res. Also I only have 1 GB of VRAM so would it be worth it having so little VRAM? and can my power supply handle it? the PSU calculator says it requires just under 500W but I wanted a 2nd opinion.

Thanks!
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post #2 of 9
IMO i would go for the 2gb version since bf3 needs 2414mb for 1920x1080 everything maxed. with the 1gb versions don't expect a huge improvememnt over the 2gb version but you can put some improvements by unlocking the shaders but becareful make sure the modded 6950 bios is the 1gb version since you have a 1gb card.
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post #3 of 9
Your PSU is border line, it will handle it IF you don't overclock. If you want to OC get a 750W.

Is it worth getting another 6950: IMO no, your all ready getting 40+ FPS right? 1GB of VRAM should be enough for 1920X1200, if you want to check use GPU-z, under the sensors tab it will show you the amount of VRAM uses, make sure you tick the "refresh GPU-Z while in the backgroun" button
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post #4 of 9
You're pushing it with a 600W PSU (with only 480W on 12v line). Check Phaedrus' PSU calculator to be sure, but I don't think you'd be able to run 2x6950s on that.

As for getting a big FPS increase in BF3, you would definitely see an increase, but I don't have the game so I can't make a certain yes or no.
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post #5 of 9
There's no point in getting a second 2GB 6950 or 6970, because you will still be held back by the first 1GB 6950. If you're going to get another GPU just get another 1GB 6950.
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post #6 of 9


Do you have Overclocked your 2500k?

Edit: Having 2500k @3,3GHz with HD 6950 CFx uses like more or less



http://www.anandtech.com/show/4061/a...eon-hd-6950/12

Maybe with i5 2500k uses 25w to 100w less than using i7 920

so yes maybe it´s possible for ur psu

I think that a single is enough for playing bf3 at ultra/high levels a game doesnt worth to spend 259$ more....unless it had dx12
Edited by PontiacGTX - 11/1/11 at 8:54am
post #7 of 9
well pontiac he would need about 2200 to 2400mb of vram to run the game maxed out with his res so he would need two 2gb vram cards so it would distribute the memory needed to run.
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post #8 of 9
Thread Starter 
Thanks for the quick feedback! So it looks like I'll need to get a new psu and card before xfiring. My friend wants me to build him a strong gaming rig so I'll sell him my psu and card, psu was $110 and card was $240. Do u guys have any strong recommendations for a 750W PSU and not too spendy card? Should I get a reference and unlock it? Budget would be around 350$ give or take for the psu and one card
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