check your mounting!

[craig588]

I thought I had pretty good contact and the internal probes on my mobo were just acting weird, after all I was doing better than I was on my single stage system, 3GHz super pi 32M stable compared to 2.8GHz 32M pi stable, but it wasn't even my limit. I tightend the nuts down untill rather than just feeling alot of resistance I actually couldn't move them any tighter with a half foot long ratchet. My idle and load delta has dropped to under 10 degrees (As read by the internal probe, it's not acurate, but the differences might be) my load temps according to the suction line temps as read by the DT150 have risen to -80C, but I need to re tune the PEV for the new higher load.

The jist of this post is to always make sure your mounting is as tight as possible, it helped my temps alot. Even if your evap is -150C it doesn't matter if your CPU is only hitting -10C.

[twilius_basic]

Yep, contact is everything. I was playing with dry ice on my GPU a few days ago... at first I had like -46C idle, but load temps were going positive! :eek: like 18C!! and my OC's were sucking (tried 680 core on my X800 and hardlocked). So I knew that my contact was terrible. Remounted it taking great care, and sure enough, after tweaking the levels of Acetone I used, I got idle temps of -69C and load temps of -56C :D That's at 750mhz+ core with 1.77v ;)
And I've had this same scenario enacted out with air-cooling and dry ice many times before.

craig is right:


"Kids, without good contact, you got nothing!" :banana:

[SoF]

yes this was what costs me 3 days instead of 1 day of testing.
according to voltage and load the temps increased over subzero and my 3500+ stopped @2700....now i'm @2850mhz and always under subzero :banana: but no more volts possible on my gigabyte :(

i think self-made kits can give better pressure, but for naked processors you have to be really really carefull...

[afireinside]

Not really. I tighten on my DTR till I cant tighten any more and its fine.