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SLI 2 7800gtx's

i havent been around in a while so i wanted to know what is the best performing drivers out right now ?
 
jokerx225 said:
Hey i wanted to know if i have 2 7800gtx 256mb does that mean i have 512?
Click to expand...

You have 512MB, but you also have two copies of every thing stored in it. :)
 
Each card does in fact have 256MB of ram and therefore in the literal sense there is in fact 512MB of ram in your machine dedicated to video cards. However, since each video card splits the workload of any given scene or frame, and duplicates the ram usage in many cases you only get 256MB of usable ram as was pointed out in the other post.
 
i noticed in my system properties there is a PCI Bridge Device with a question mark what is this and is it imporntant?
 
jokerx225 said:
i noticed in my system properties there is a PCI Bridge Device with a question mark what is this and is it imporntant?
Click to expand...


sounds like you did not install your chipset drivers
 
The graphics cards onboard memory dont double in SLi, because they both contain the same info on the 256MB onboard memory.
 
jokerx225 said:
Hey i wanted to know if i have 2 7800gtx 256mb does that mean i have 512?
Click to expand...

uhhhh ........

is the sky blue?

well you do technically now have 512mb on board ram, there on separate cards, so if your wondering if one gfx processing unit (GPU) can acess 512mb of ram, no it cant.

but for all intensive purposes, yes, you can say "i have 512mb... along with 2 cores"
 
Dan_D said:
Each card does in fact have 256MB of ram and therefore in the literal sense there is in fact 512MB of ram in your machine dedicated to video cards. However, since each video card splits the workload of any given scene or frame, and duplicates the ram usage in many cases you only get 256MB of usable ram as was pointed out in the other post.
Click to expand...


Actually its in all cases. Both Video cards must fully load the rendered image to output. So both cards are using up all their framebuffer space. You never effectively have more than 256 megs of memory.

To the original poster. I wouldnt worry about it. There are very few cases that having 512 megs of memory would be much of a benefit to your gaming experience. Especially if you carry 2 gigs + of system memory.
 
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