Yes the modules could cold boot full pot no problem, booted 8600 CL26 directly (no change in OS) and I think 9000 CL28 too. Also we couldn’t get anything stable haha, and still couldn’t at home with the sticks that cold.
Problem is stabilizing the cpu imc below -140 is a big problem, and that was on the special cold bios, before the competition bios -30 caused issues.
Can suggest trying to raise cpu vdd2 a bit vs ambient settings, but don’t expect more then 8200-8400 at full pot without working on it for a while.