Do two 6870 1gb make 2gb?

[NAGZS]

6870 are generally 1gb, but if you cross fire them does it make the performance of a 2gb card?

 

[crisium]

No. It can only use 1024MB of VRAM. However, it will be far faster than a single Radeon 6870 2GB except perhaps in certain cases where 1 GB card cannot run due to an insanely hight setting that demands more memory. Crossfire vastly increases performance, but the VRAM only counts once.

 

[busydude]

Simple answer: NO.

Total VRAM = 2GB

Effective VRAM = 1GB

As long as you are not exceeding the effective VRAM limit.. you should seesubstantial increase in the performance.

 

[NAGZS]

hmmm, Do you think it would be worth it to spend the extra $100 for a crossfire 2gb 6870, or are the chances of needing 1gb more of VRAM to slim?

 

[NAGZS]

AND, in what scenario would I be using excessive amounts of VRAM?

 

[s44]

Ultra-high textures, extreme AA, resolution above 1080p.

 

[3DVagabond]

I don't think a single 6870 needs more than 1 gig of RAM. Not quite enough GPU power to warrant it. I think dual 6870's could easily benefit from 2x 2gig of RAM though. So, I guess if you are buying 2, or you're pretty sure you're going to get a 2nd one down the road, get the 2gig'er. If not, just get the 1gig card.