Dual 5770 in First Gen Mac Pro?

[cbrook824]

I know that the 5770 graphics card works in the first generation Mac Pro, but can the machine handle two 5770 cards?

 

[Cindori]

yes, but it will be bottlenecked very bad from the slot speed.

two options:

8x 8x, lose up to 20% performance on both cards


16x 4x, lose up to 40% performance on second card

 

[igouroum]

bottlenecking

I'm more concerned about the CPU bottlenecking than that of the pcie slot..
Will any type of recent medium-high-end graphics be heavily bottlenecked by the cpu and pcie slot?
I'm a moderate gamer... I have a 1920x1080p display and i like playing games like crysis 2 and other graphic intensive games.
How will the 5770 perform in those games with the two dual core "woodcrest" cpus?

thanks

mark

 

[interslicer]

the 5770 is pretty good. its not mindblowing but its enough to play games at a high setting.

as far as i know, in osx having dual gpus doesnt help aside from supporting more monitors. for instance one card will not increase performance on a monitor connected to another card.

in windows you can link them in crossfire which would increase performance.