Can't change my RAM timings

[kaiweiler]

Abit IP35-Pro
+
Crucial Rendition PC2 5300 667Mhz 5-5-5-15 1.8v

Alright so I want to run my RAM at 800Mhz. I know it is capable of this because I had it running at 844Mhz in my old AM2 system, I just had to loosen the timings to 6-6-6-18.

The problem is that whenever I change any of the timings to anything other then Auto on my IP35 Pro, I get the C1 error which is "Detect Memory"

It will boot at 800Mhz with stock timings but is unstable in Prime blend test (fine in small FTT's)

I tried using MemSet to adjust the timings within Windows but they won't actually change.

Does anybody know how I can successfully loosen the timings on my RAM??

Thanks

[meionm]

Did you try increasing vdimm?

[kaiweiler]

Yes, I have tried from 1.8v up to 2.0v

[meionm]

I list some thing to try. Check command rate on that board if it is 2t, might be helpful or not I don't even remember if it can be changed.

Try updating bios, if you did done so.

Increase northbridge voltage.

Check if memory is not defective by running memtest with memory at stock speed.