Originally Posted by Dr216
You can check with nvidia cards how much vram is in use, if you are infact vram capping (which is pretty likely) then upgrading to the 2gb cards will help allot.
As for the wether you need 2 or 3 6950's im not really sure, I can tell you that with 2 5870 2gbs I've not had any trouble with any of my games, although i do sometimes need to lower or remove AA or AF. You also might want to consider the 3gb 5xx nvidia cards, not sure where they come price wise.
Thanks for taking time to help, +1.
I'm having a bit of an issue with one of my cards, so that kinda explains the random crashing. But Metro is playable at medium quality dx9 aaa and afx4. dx10 is causing immediate crashes so that correlates the card issue I mentioned. But, immediately the menus begin to be sluggish and its utter rubbish when I crank up to dx10, dx11 is worse, and high quality is like walking through fresh poured cement.
My current loop is setup for three cards so triple 6950 or 6970 is more appealing and I could welcome some extra humph in games like Metro 2033. I'm leaning on the 6970 since I wouldn't have to go through the prospecting and hoping of getting a card that unlocks. 6990+6970 is actually more expensive but outfitting it with water is slightly cheaper. Coupled with the fact that 6990 are out of stock all the time and it will interfere with my loop, I'm not seriously interested.
I would like to stay with nvidia since their drivers have been stellar, though I have heard plenty of praise from the red side recently so I'm not really deterred by old stories of driver horrors. The negative aspect of the green team is the low vram and high price. Newegg is selling 3gb 580s at a ridiculous price of $600 usd. I see more potential in the tri-fire setup. Just gonna need to sort out a few things and then there's a big chance I'll be switching cards.