Hi people,

I have a Super Socket 7 motherboard that allows 3 stick of 256MB SDRAM. When I add 3 sticks (256MB double sided pc133 each) and boot up again I get a continuious beeping sound and the system freezes. I tried 2 sticks and everything runs fine. Can anyone tell me why the motherboard wont allow the 3rd stick?. Is there something in the bios I have to change? Any suggestions would be appreciated. Motherboard is a PC Chips 598M (1998 approx.).

Regards matt73_au

That board says it supports 768 so you should be able to use all 3 X 256.

I do see that the board claims SDRAM PC100 and that could be the problem. If you are only using 512 you might get away with running PC133 but when you max it out you may need PC100.

Are all 3 sticks identical? Have you tried all the combinations of sticks and slots?

Yes, all sticks are identical to 256mb sdram double side pc133 (Legend). Yes, have tried different slots, still same result. Manual has on front pc100, so maybe you are right. Sounds like I can only achieve 768MB by using pc100 sdram. Is there anything in the bios I can change for this?

If it is possible it would be a setting for the BUS speed or perhaps the CPU speed.

You are looking to overclock the board. I sort of doubt that a board that old would have these features but that would be what you are looking for.

I have a few old Celeron PCs at the moment that have PC Chips 598 boards. They do support manual setting of the bus speed and multiplier but they only support up to 100MHz for the front side bus so you won't be able to set it to 133MHz to make the RAM slots fully support PC133 memory.

Incidentally, if you're trying to fit that much memory in order to eek out as much performance as possible, I'd say that you'd be better off replacing the board if you don't mind doing a clean Windows install. The PC Chips 598 range are pretty disappointing performers - the same components would run better on a Gigabyte or Abit motherboard.