Had this system
Leadtek nForce2 Ultra Delux | Athlon1700+@2.3Ghz | 512MB Corsair XMS3200 | GeForce Ti4200 64MB@305/610 | 2*120GB WD SE HD
At that OC for ages now but I've had one problem with it since leaving it at 2.3Ghz, my PC simply won't re-boot. It will close down winxp okay and get to the black screen, then stay there with the HD light still on. The only way to stop this is to switch the PSU off/on then boot up. And usually on boot up it'll stick on "Verifying DMI pool" or something like that. So I have to switch it off by the PSU for 10min then boot up and it's fine.
The only thing I've noticed is that "vddq" is only at 1.48, is that a bit low? I've got an enermax 350W PSU.