Hi Major, was thinking of doing this shortly, and am thinking of running at 13v. I have a 3-15v switching psu i was gonna use for my 226w cpu pelt(brought like a year ago, thought better, tried to sell forgot, found, thinking bout it again :p ). it can take 40amp's(maybe 45) so will be fine with those two pelts. 13v sounds like the sweet spot from you guys.

Thing is i'm trying to work out how much better than the stock 80w pelt is. Thing is, i've been trying to use this guide http://www.ocfaq.com/article.php/cooling/extreme/tec/58
to work out power of a 226 at certain volts, and same for teh 172 24v and i come out with strange answers. Are those calc's accurate, them seem so, but i get odd results. If i was using 13v on that 226 pelt it would seem to provide 193W cooling power, and require 266W to run the pelt. thats fine.

but if i choose 8v it will give 118W cooling, and require 100W to run the pelt, which seems very obviously flawed. The reason that worried me, and the reason i checked that is that the 172W 24.6V pelt seems to provide a touch over 90W cooling, but again only says 77.6W to run? So are teh numbers right but the power needed doesn't quite work right, or is the ampage wrong?

Just wanted to check.

Also the swiffy 80W pelt is rated 15.2v Imax at 80.3W 8 A.

which at 12v is only actually giving 63.3W of cooling? draining 6.3 amps and 76W off the PSU? If thats all right cooling powers but the rest is just not quite accurate power needed. Then a 172W provides about 50% better cooling power overall? If so i'll try that. What about a 156w 40x40mm pelt or a 120w. not much choice in the UK, any good US sites that you can think stocks them?

Cheers