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How much vram will I get if i sli 1.5GB and 3GB GTX580?

post #1 of 8
Thread Starter 
I know they share the same vram and stuff but how much will you get if you SLI 2 difference capacities?
post #2 of 8
Since they mirror each other you will only have 1.5gb to use.
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Frank
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post #3 of 8
1.5GB. Your 1.5GB 580 doesn't have enough memory for it to match up to your 3GB 580. Thus, the 3GB 580 will only use as much as the other card, since they are acting as one.
post #4 of 8
Thread Starter 
Oh ok. Thanks guys
post #5 of 8
They won't SLI anyways. Nvidia cards that have different Vram amounts cannot SLI due to how the drivers recognizes the cards.
     
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post #6 of 8
umm glidin actually they will SLI together, only time they won't SLI is if it's memory bus differences.. like with 460's you can SLI a 1gb with a 768 but they both have to have the same bus rate of 192-bit or 256-bit the 3gb version will just use 1.5 of it's memory. thumb.gif
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post #7 of 8
Quote:
Originally Posted by JunkoXan View Post

umm glidin actually they will SLI together, only time they won't SLI is if it's memory bus differences.. like with 460's you can SLI a 1gb with a 768 but they both have to have the same bus rate of 192-bit or 256-bit the 3gb version will just use 1.5 of it's memory. thumb.gif

Good info, I did not actually know this about the bus rate.
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post #8 of 8
Quote:
Originally Posted by Fossil View Post

Good info, I did not actually know this about the bus rate.

yea, the 460's being prime examples alot of people mistaken the 460 V1's (256bit) for V2's(192bit) and vise versa, so when they tried to SLI them it wouldn't work. it's that tiny bus rate people tend to forget mostly sometimes. as the 580's tho all carry 384bit they'll work regardless of Vram smile.gif
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