Had my first ln2 benching session today. Overall it went pretty well. 10L lasted me about 3hrs with extras left over.
pics:
$20.00 for 10 litres of ln2 and $100.00 deposit on cc for the dewar.
setup:
chilly1 DI/ln2 container
p4p800se / ct-479 / pent M 760
hyperx 3200bh-5/ ocz booster/ OCZ 600watt psu
Not the prettiest mount, but it worksI'm working on a custom test bed with an arc/press over the mobo/chip just like the japs use soon. IMO, that is the best setup for ln2. No need for hold-downs and very easy to setup. The container will be machined out of a solid 3in x 9in copper block.
Didnt get too much icier than this really until I went below -150c or so. I think the fans and ariflow over the the top half of the board helped. If I let the temps rise to around -100c under load, any ice that formed would slowly go away.
and some benches:
http://valid.x86-secret.com/show_oc?id=18232
Overall I was happy with the results and chillys container worked great with 1/2 inch closed cell. Nothing boiled over ever and I inuslated socket area good enough to bench for 2-3 hrs straight. To prep mobo, I taped up all peripheral slots and connectors and sprayed front and back of mobo with clear laquer spray.
These runs were to get a feel for the cooling power of ln2 and to develop the "touch" with pouring/maintaining cetain temps. Either this chip or the mobo didnt like anything lower than -165c or so. When I got to -180c on the base of the container, the rig just shutoff and wouldnt come back on until the base temps got up to -150c. This behavior repeated itself everytime it got too cold(below -165c). Didn't matter what vcore.
I have a better clocking 760 here along with a fully modded p4c800-e which should get me into the 21's for 1mpi at these clocks and maybe 33.9* or better for pifast. With better clocks on my other dothan chip who knows.... Next round on friday, can't wait
Reply With Quote
Bookmarks