I'm using the latest driverpack from Nvidia, their autodriver finder reccommend the ones I have now. Still that driveragent site says it has newer/better drivers for the 3 things I listed.

Hm. DriverAgent usually isn't wrong. I'll look into finding the newest ones. My DriverAgent subscription is up so I unfortunately can't find them that easy.

I have tried all the bioses before, but I have now had an interesting development. I updated to 1205 bios again, but this time through EZupdate inside the bios instead of using AWDflash from dos. Now the machine hangs a long time after the startup beep. It stops for a long time after it list the CPU, then it takes about 30 sec before listing Ram and HDD's. (it's not quick boot disabled)

I Have to wait those 30 secs to enter bios too. it just say entering BIOS for 30 or so sec. But I don't care. I have now watched 9 episodes of House MD in a row without a crash and the computer is as fast as it should be as soon as it starts booting and in Windows.

That's great! There should be a setting in the BIOS about "Quick Bootup;" there usually is, and it may be turned off.