Thanx Patio. Yes there are 3 fans in total, 1 on the CPU, 1 in the case, & 1 in the PSU. I also set them to run at full speed in BIOS. I could move the tower as it is quite near a radiator, & in my work station, which would no doubt help here. When I fitted the MB I installed the drivers with the disc supplied with the MB, but was unable to boot up with my 'Restore' disc. It said something like 'files missing' so I took it to the local comp. shop, who returned it to me working ok. I think they may have installed an OS to replace the missing file then rebooted with my disc, but I'm not sure. I should add that it only shuts down very occaisionally, maybe once a week, sometimes only once a month. My main question is, would I be better buying a new OS, maybe XP 64bit? What, if any, would the advantage be ie 32 v 64 bit? (I don't do gaming etc.)Plus the original query, will running Intel Pro Set cause a conflict with AMD? What would happen if I removed it?