When you run Crossfire does it utilize the memory on both cards?

[Joyce P]

Hi, when you run two 512MB cards in Crossfire or SLI does it just put the second GPU to work or does it also utilize the memory on the second card? If I wanted 1 gig of dedicated memory while running two 4780's in Crossfire would I need a 1GB card or would two 512MB cards equal it? Thanks!

- Joyce

 

[/\E]

Hi, when you run two 512MB cards in Crossfire or SLI does it just put the second GPU to work or does it also utilize the memory on the second card? If I wanted 1 gig of dedicated memory while running two 4780's in Crossfire would I need a 1GB card or would two 512MB cards equal it? Thanks!

- Joyce

Yeah, 1GB for both cards or 512MB each.

 

[Backwoods166]

Hi, when you run two 512MB cards in Crossfire or SLI does it just put the second GPU to work or does it also utilize the memory on the second card? If I wanted 1 gig of dedicated memory while running two 4780's in Crossfire would I need a 1GB card or would two 512MB cards equal it? Thanks!

- Joyce

yup, you want 2x512. You get 1g total and they overclock better than the 1g versions.

 

[Joyce P]

yup, you want 2x512. You get 1g total and they overclock better than the 1g versions.

Awesome, thanks. Does RivaTuner's OC'ing software work the exact same for the ATI cards as it does on the the Nvidia's? Also can you run dual monitors in Crossfire? Thanx!!!!

- Joyce

 

[TrainTrackHack]

NO, NO, NO...

The content of the memory on both cards is mirrored, so with two 512MB cards in CF, even though it's 1GB total, you still effectively have 512MB. Also, memory is not the only thing that matters, 2x4850 512MB will perform much better than 1x4870 1GB. And 2x4870 1GB performs tons better than both of those setups... I'd certainly recommend the 1GB version in crossfire, since crossfire is best at high resolutions and that's where the extra VRAM also helps a lot.