First time with LN2 on CPU and also first time with LN2 on mems. I was running my potato i5 with Ripjaws 1600C7 (XED IC and ST PCB). Non-EK SF3D pot on CPU and Kingpin Dominator pot and heatsinks on mems (still only elastic bands for mounting!).
Managed to get the 2600C6 profile working with 4/4/35/36 @2.15v (non-minimised) for 32M with wazza. Original run was at -90C on CPU and -140C on mems.
Tried to up it to 2666C6 with looser RTLs of 36/37 as 35/36 wouldn't train, but it failed 3 times at loop 18 when trying different temps. (Tried -80C to -110C on CPU and -120C to -140C on mems). More volts didn't help and often caused it to fail booting. I was going to go back and run on a clean OS + try and tighten timings, but I'd wasted too much time trying to clock my potato i5 so the board gave out after 5 hours due to condensation.
In conclusion LN2 is fun on CPU, but cold mems is much more fun due to the additional difficulty (and lower 32M times)!
Next time I think I'll try to get some proper mounting hardware (or a new ram pot) and run CPU on phase so I don't waste time/Ln2 on it. Also, I need to try my better mems with KO-8117 pcb on cold at some point.