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Does VRAM stack in CF or SLI?

post #1 of 18
Thread Starter 
I heard that BF3 uses up to 1.4GB of VRAM if played on high settings at 1920x1080 and my 6870 only had 1GB of VRAM. If I CF it with another one will the VRAM stack to make 2GB total?

If not, then I will probably buy either a 6970 or a GTX 580.
post #2 of 18
no, it dont, but bandwidth stacks sorta

i say just wait till battlefield 3 is released before buying new card.
post #3 of 18
Nope it does not. The VRAM data is mirrored to both GPU's.
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post #4 of 18
Quote:
Originally Posted by LethalRise750;14450432 
Nope it does not. The VRAM data is mirrored to both GPU's.

This. I wish VRAM stacked up with multiple cards lol
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post #5 of 18
The VRAM for each card is your framebuffer so you would have 1GB.

I highly doubt BF3 uses 1.4GB of VRAM at 1080p unless you have a crazy amount of AA on.
    
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post #6 of 18
No. for multi monitor gaming get a 6970 CFX (price/perf) or 3gb 580 to Sli (perf/perf)
    
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post #7 of 18
What? That's lame. :/ Glad I decided to get a GTX 480. smile.gif
 
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post #8 of 18
No, it doesn't. If you pair 2 6870s 1GB you'll end up with 1GB total VRAM wink.gif Same for every CF or SLi setups.

Some more info, you can pair 2 cards with different VRAM, but the total output will be the lesser amount. Ex. If you pair 2 6970s, one of 1GB and other of 2GB, the total VRAM available will be of 1GB only.
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post #9 of 18
if you want better framerates for battlefield 3, youll get more by buying 2500k or bulldozer 4 cores or whatever. CPU is holding you back more than GPU in my opinion.

I noticed huge difference going from q6600 at 3.6 to 2500k at 4.5 in bad company 2, and battlefield 3 is going to be even more demanding
post #10 of 18
Quote:
Originally Posted by sloppyjoe123;14450448 
No. for multi monitor gaming get a 6970 CFX (price/perf) or 3gb 580 to Sli (perf/perf)
No, the 6970s are just as fast as the 580 3GBs.
Quote:
Originally Posted by TheRockMonsi;14450450 
What? That's lame. :/ Glad I decided to get a GTX 480. smile.gif
You're assuming your single 480 has the processing power to utilize that VRAM.
Quote:
Originally Posted by Lex Luger;14450456 
if you want better framerates for battlefield 3, youll get more by buying 2500k or bulldozer 4 cores or whatever. CPU is holding you back more than GPU in my opinion.

I noticed huge difference going from q6600 at 3.6 to 2500k at 4.5 in bad company 2, and battlefield 3 is going to be even more demanding
From that 6600 to the 2500K shouldn't be a noticeable difference at high resolutions with a single GPU.

Don't upgrade anything until the game actually comes out.
    
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