I bought a supercharged i7 920 on Ebay that does 4.5 GHz @ 215 BCLK @ 1.40 V on air stable.
What would be your best estimate on overclocking this chip with the future system if I achieve the -80 C no load.
CPUs are all different and usually the ones that Clock really good on Air are horrible on extreme cold, the reverse is true also.
A good research of batch numers for the processor you want to use is generally the best way to go to find a chip that will perform in the temp range you want to use.
Also your temp range of -80c seems a bit off, how are you coming up with this number ?
SS Phase temp range is generally -45c - -20c under load, give or take some in that range depending on the unit. You will not find a SS Phase that runs at -80c as far as I know.
-80c is in the DICE range or just a tad colder. This might also be in the Auto Cascade temp range, these units are some what rare and not that many around that actually work. NOL would know a great deal about these units, hes a smart guy
I have seen a window AC unit converted to a 2 stage cascade that hit in the -80c range, or instant DICE temps.
2 Stage Cascade systems typicaly run at -110c range unloaded, give or take a few degrees depending on the unit. There are some so called mini cascades out there that are actually pretty nice, again some what rare and complex.
A good amount of research about all these systems is in order, proper CPU's to use for a given temp range, what type of cooling will be used and the capabilities of such units. Can the equipment I have reach any of these spec's. Otherwise projects tend to end up not working they way things were intended, forcing rebuilds or unsatfactory results. Knowing the pros and cons of each type of piece of equipment is a big plus, I would never expect my Cascade to run at -80c unloaded, nor could my SS Phase reach that level of cold and be able to handle any load at all.
Edited by Buckeye - 1/29/10 at 8:49am