The OVP limit is anywhere between 1.3625-1.4125V (1.395V typical according to datasheet, while I use this unlocked bios), but that is easily enough for me. I'm considering 1.3V max voltage, if the core clocks well to that point. If the core hits the wall somewhere in the progress, I'll stop and be happy with what I got... But I'm hoping for 1400MHz, let's see =)
I soldered a wires between VFB and GND leg of an output capacitor. In the end of wire is a 2-pin female connector with 2.54mm raster.
I had accidentally dropped the VR I took from work.. so I had no VR to test with. However I had some 1206 chip resistors, which I then soldered on pin header.. This header is easy to swap. =)
No VFB-GND resistor gave me 1.236V, which is a bit more than what the VID's have set. This could also be error from my 7€ multimeter I'm going to borrow a more accurate one from work for the weekend..
150k resistor gave 1.244V
100k --> 1.249V
75K --> 1.254V
50K --> 1.266V
I ran heaven benchmark once with 1.266V. I set the core 1372MHz and memory was 3758MHz.. It worked like a charm.. I'm going to try higher clocks now..
Gonna take another VR tomorrow and do some more testing. =)
Edit: Just ran through with 1385MHz. It's not fully stable though. First time didn't go through. I should try without clocking the memory next, because I think I'm pushing them quite far here. 3758MHz sounds like a lot I'm not sure what they usually are.
Somethings wrong with EVGA Precision X though! It won't let me increase core clock by +1. It jumped from 1372 to 1385.. Tried every value in between, but it stayed 1372 for many increments and then jumped to 1385.. Should I use another program?
Edited by Olper - 11/28/12 at 11:39am