Hardware part of the system consists of TYAN FT72B7015 barebone
, two Xeon 5690 CPUs, 144 GB of RAM and 8 Zotac GTX 580 cards with 3GB of RAM each. This system used to work under XP64 without any problems and issues, however, system does not work under Win7 64 Ultimate (original question can be found here
After a number of experiments I have localized the problem: system works just fine when only seven (not eight) GTX 580 cards are installed, however, as soon as the eighth card is installed OS starts to work very slow (extremely slow visualization of even simple windows GUI, all applications that use CUDA technology work very slow, FurMark test works slow and jumpy). It all happens with latest official Nvidia drivers (285.62).
I have an impression that this happens due to the lack of resources that OS distributes among various installed devices. Good experience with XP64 as well as a number of examples of succesfull FT72 + GTX 580 based builds makes me think that configuration with 8 GTX 580 cards can also be handled by Win7 properly.
What must be done in order to make such a configuration work fine under Win7 64 Ultimate ? May be drivers can be tweaked in some manner ?
Thanks in advance.