670 vs 7950 vs 680

[filipebow]

Was going to sli 7950 but realized that id have to upgrade my psu(currently at 750w)


my question is if i got this http://www.newegg.com/Product/Product.aspx?Item=N82E16814130824 and sli it would the 750w be enough



i kno 670s use less power not sure tho and would i get similar performance out of the two 670's over the two 7950's



i also heard the 680's drivers dont work well with sli anyone have thoughts on this




Should i get the 680 or the 670?

These cards that i do get will be used to play games like bf3 or farcry 3 fps and some mmos

My current comp specs
mobo- ASRock Z77 Extreme4 LGA 1155 Intel Z77
Cpu- Intel Core i5-3570K Ivy Bridge 3.4GHz (3.8GHz Turbo)
Ram- G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3
Graphics card- nvida 660 ti
psu- 750w crosshair
Monitor-benq 120hz

 

[feeblepenguin]

double up on 7950s or 7970s. even if you have to upgrade psu, it will be better, and cheaper. Also, your old psu should have some retail value.

 

[refillable]

ATI/AMD=Crossfire/CF
Nvidia=SLI

Both 680 and 670 is fine for SLI. But do note that 670 do not use less power than 7950, but is faster. Shown here:

http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_670/26.html

But I think you should ditch out these idea. You already have a 660 Ti and you should go and SLI that. 750W Crosshair? You mean Corsair? TX750 should be fine for 660 Ti SLI.

 

[filipebow]

Yeah i might just get another 660ti i got it as a gift and i thought it was alot worse then it acually is till i noticed the core on it etc... thanks.