Hello I have a Socket 370 PGA board and I tried to install a Pentium III 500 but when my system booted there was no display and the hard drive many two grindy sounds Can the PIII 500 imstall on Socket 370 or have I got a dud CPU

Wow that is an old board no doubt about that !!!! Now I could be wrong here but I dont think that board was able to take the P3 on the socket 370 !!! Refer to the text bellow which I extracted from the board manual !! Install the Processor This mainboard has a Slot-1 which can be installed with any Slot-1 processor cartridge including the Pentium-II, and the SEPP Celeron. It also has a Socket-370 which can be installed with the new Celeron processor which is shipped in a PPGA (Plastic Pin Grid Array) package. To ensure reliability, make sure that your PPGA Celeron processor is fitted with a heatsink/cooling fan assembly. You can install a Slot-1 processor or a PPGA Celeron. You cannot install a PPGA and a Slot-1 processor cartridge together. Take care that you do not try to install a Socket-7 processor into the Socket-370. A Socket-7 processor such as the Pentium-MMX, or the AMD K5/K6 does not fit in the socket-370. The following table lists the processors that are currently supported by this mainboard. New processors may be a released after this manual is printed. Processor Cartridge Clock Rate MHz Processor Socket System Bus MHz Pentium-II 450 Slot-1 100 Pentium-II 400 Slot-1 100 Pentium-II 350 Slot-1 100 Pentium-II 333 Slot-1 66 Pentium-II 300 Slot-1 66 Pentium-II 266 Slot-1 66 Pentium-II 233 Slot-1 66 SEPP Celeron 433 Slot-1 66 SEPP Celeron 400 Slot-1 66 SEPP Celeron 366 Slot-1 66 SEPP Celeron 333 Slot-1 66 SEPP Celeron 300A Slot-1 66 SEPP Celeron 300 Slot-1 66 SEPP Celeron 266 Slot-1 66 PPGA Celeron 533 Socket-370 66 PPGA Celeron 500 Socket-370 66 PPGA Celeron 466 Socket-370 66 PPGA Celeron 433 Socket-370 66 PPGA Celeron 400 Socket-370 66 PPGA Celeron 366 Socket-370 66 PPGA Celeron 333 Socket-370 66 PPGA Celeron 300 Socket-370 66 IF IT AINT BROKE, DONT FIX IT A8N-SLI Deluxe AMD X64 3500+ Wnchst Corsair 2x512 DDR400 Dual Channel GV-NX6600128D PCIX Graphics Card Ggbyte GT Pro CPU Cooler Zalman VF700-CU VGA Cool

Hi sounds more like duf hard drive, however re; PPGA Celeron 500 Socket-370 66 you could run it in a riser card if you can get hold of one http://support.intel.com/support/processors/celeron/Img/slocket.gif fsb 100 x 5