[RESOLVED] Global Ciruit Tech. GCT-8ST Motherboard

[daviscom]

I recently purchased a used machine from a local computer dealer but unfortunately
there was no manual with the system. The motherboard is a GCT-8ST with a
Cyrixinstead 6x86.

My problem is that I want to upgrade the memory and have no idea as to what
configurations I can use or how much I can add. There are two 72 pin SIMM slots, can
I use a pair of 32MB or 64MB chips with this mother board. Also there are three
168pin SDRAM slots, what is the highest MB chip I can use in these slots and is it possible to use the PC100 SDRAM chip? Furthermore if I use the 168 pin chips do I have to have matching chips in all three slots or can I upgrade one chip at a time?

I have e-mailed the Tech. Support at GCT several times over the last two month and have yet received a reply.

Any help on this would be greatly appreciated.

[stevet]

SIMMs must be installed in pairs, but DIMMs can be installed in singles. And, according to what I found, your board supports SDRAM so you can use PC100 SDRAM. Some of the early boards that supported SDRAM had a jumper on the motherboard somewhere near the DIMM slots to set the DIMM voltage to either 5.0v or 3.3v. If your board has this jumper and you use SDRAM, make sure that this jumper is set to 3.3v. As far as the maximum size that you can install, I don't know. Trial and error is always an option.

Steve

------------------
Altoplanos Information Systems, Inc.
Coeur d'Alene, Idaho USA
www.altoplanos.net