I have this MB in a dual boot computer (XP x86 / Vista x64). Under XP, when using Vegas rendering, I cannot get full utilization of the Quad I have... Or to be more precise: when I set Vegas video to 8bit, it renders at 100%, but in the 32bit video mode - only some 50-60% (still all 4 cores, though).
Under Vista x64, I'm always getting 100%.
This makes me think something is wrong with the 4GB of RAM management. Vista x64 can use it all, how much is XP supposed to use? In the system properties, it says 3.0 GB -- shouldn't it be some 3.2GB?
Whitch switches do you have in the boot.ini file? I only have "/noexecute" and "/fastdetect". What is PAE and how it should be used? Ach, anf of course I have RAM remappring feature enabled (so that Vista can see all 4 GB of it); tried to disable and see how it affects XP - no diffeence...
If it's not the memory management, than perhaps some BIOS prob? But is it possible the same BIOS settings are OK for one OS and bad for another?
Any help greatly appreciated - I have to work under XP for some time, as some other apps do not work under Vista x64, and hate to think I'm wasting a lot of time rendering HDV in a non-optimized fashion
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