Well, finally managed to get some decent benching in yesterday - testing my GTX 580 cards on air before going sub-zero in a couple of weeks 

My new(ish)retail 980X is going pretty well - benching 3D03 / 05 at 6050 using only 1.8V in bios. CPU temp -115/-120. Batch is 3013A5xx

GTX580 Cards are doing pretty well on air - maxing out at 950+ / 1150 with GPUV @ 1.1V only. Temps not going above 75 degrees C

3DM03 Single Card 119k

3DM03 Dual Card 174k

3DM05 Single Card 50k

AQ3 Single Card 411k

And a screenshot just for good measure.....

Need to do some work on the efficiency of these runs (memory speed / NB speed) and will then try some higher volts and other benchmark runs

Alex (Sup3rfly) and I have a day benching session organised in a couple of weeks - so will prep these cards for LN2 over the next couple of weeks  With around 70ltrs of LN2 available we should have a blast