Quote from: dishwara on March 22, 2011, 02:43:45 PM

so, now i am in the position that 64 bit supports more than 4gb ram so it must support more cards.
Actually my system has 4 gb & windows recognisze 3gb only & then 1gb in graphic card. so totally , 5 gb
windows 7 32 with HD6870.

please i need help to find out maximum number of cards supported by an OS.

please input your datas.

memory is not the problem here, you can only physically "fit" so many cards onto a single motherboard, my guess is that 4 cards is the max, and that would be single gpu cards, quad-fire is as high as it goes to date, isn't it...? I don't think you can run four 5970s or 6990s in the same system because they both are 2 gpu cards, I mean you could I guess, but it would be a waste because you could only quad-fire them and that would leave half the cores idle, no...?

also you have to realize that those 4 cards are all gonna pull power from your PSU, a lot of powah, so I hope you have at least a 1kw PSU if you plan on running 4 cards, and not a cheap piece of junk 1kw PSU either, a good one that can output it's rated wattage, those tend to get expensive...

so basically my guess is 4 cores, but I could be wrong...