Hi Guys,

It looks like a few of us are going through the same thing, my specs are:-

mother board is gigabyte ga-m56s-s3
4800+ Dual core running at 2.5ghz
2 x 512megs of kingston ram = 1 gig rated at 667mhz
windows xp32bit with sp2
80gig seagate hdd
-nvidia 8500gt 512meg vid card

I just upgraded from AGP to PCI Express, and now really getting ticked of from the lockups. I actually had an asus board (PCI Xpress M2V model) and thought that was causing it, but still happening with the gigabyte board.

I upgraded from athlon64 3000+ single core cpu, AGP m/b and never had any issues with that system, it's only happening with this new pci xpress

So now this is the stage im at:-
-Ive run a hdd diagnostics tool for seagate hdd, and thats ok
-im running a free tool for memory test called memtest86 on just one of the 512 meg modules-stilltesting, but what i noticed is that if you lower your cpu speed, i.e do not overclock your system, it will change your ddr ram speed, example it shows my cpu at 2.5ghz, and the ddr2 speed at something like 717mhz, this is actually going over the rated 667mhz of the memory chip. now when i bring the cpu speed down to 2.4ghz, the ddr2 ram speed shows 688.

so there is a relationship between cpu clock speed and ddr ram speed, i think thats where my system is becoming unstable, more tests to come.

Cheers,

Mrd