Thanks PJ, I have another set that came bundled with these from Greece to test:). This maybe the best set of PSC I own that I have tested under cold, as the Flare 2000 c7's could not run c6 tWCL 6 at any speed and these hummed right along, almost 9 hours straight and not one 55 was had.
Though to be honest, I think Petri's advice definitely helped the most, and that is to use the heat spreaders. This setup consisted of the plates from the SF3D Triple Point pot along with the KPC Ney Pro cooler attached to them. No TIM was used, though I wonder if this would make any difference (Christian input here:))
I think this kit can run full pot as -150c was no issue for the memory, where other PSC kits I have would cb at a shade over -108c-110c