This is an ACPI system so sharing isn't the same issue, but the Gf4 and one of the USB controllers appear on IRQ 16.
The temperature is on the high side, but it's not *that* high, and it's one of the dinky little Shuttle systems, stuffed to the gills, so I expect the temperature to be slightly high.
I've run SiSoft Sandra which indicates that the CPU side is well and good.
I've tried swapping the video card for another Gf4 4200, this time a 64 MB one, with a resultant drop in performance.
Siaf, the Geforce problems with FSAA were with the Gf3, not the Gf4.
I have found that 3D Mark 2001 reports that AGP Fast Writes and Sideband Addressing are both supported but disabled, and there does not appear to be any way of enabling them, either in the BIOS (which is the latest I've found, 16 Dec 2002) or in XP.
The motherboard is an Intel 845GE-based SB51G. The onboard video is turned off.
Am I on the right track?