[First Look] DFI 680i LT NF-680i LT SLI (56K Warning~~~)

[C-N]

This to me means it's NB or RAM causing you problems. Small FFT's fit in the CPU cache. If you can run small FFT's for hours then your CPU is stable. If it fails blend then your NB or RAM are failing. Jack your Volts on those two and see what happens.

Thats what I thought & I did gradually push my NB up from 1.51 to 1.64v & it made no difference.

I also unlinked my RAM & left it at DDR900 where it had run Orthos 8 hours + & later I gradually bumped the vdimm up from 2.18 to 2.38 in BIOS & it made no difference either.

I will have another play later & see how long it will run small fft's.

As for the shutdown, it could be a few things as mentioned 1) PWM overheating, 2) Thermal shutdown, 3) Hard-core failure. If you are already cooling the PWM area, then my only suggestions are: rather than disable the thermal shutdown, try setting the thermal shutdown to the highest threshold setting. Perhaps there is a bug with disabling it. Perhaps try the new beta bios. Finally, try backing off your overclock somewhat and making sure you can get something stable that doesn't cause a shutdown.

It will run 450 x 8 3.6GHz fine & I am happy at that its just when I was messing around the other day I noticed this shutdown thing & thought I would post my findings.

My thermal shutdown is normally set to 85oC I only disabled it to try to rule the thermal shutdown out which it didn't. I am currently on the new BIOS & its just the same.

Regards

Craig.