Some days ago, I told so:
I am really surprised by your findings, Lawrence.
Anyway, just for pleasure I will test it again on a Core i7 2600K against the Thermalright Archon SB-E X2, and I'm very curious to see what will happen.
And some of you are still interested in:
Looking forward to those field tests!
So, back in black: pardon, in topic.
As said, it's just a quick'n'dirty field trial, I did not use any precautions to make these tests as repeatable (actually I was doing other things, so basicly I just swapped the coolers when necessary): first of all, I forgot to use HWiNFO to log the data (my bad), I just took the highest temp measured after a while (usually around 30 minutes, even if I forgot to stop the test in a couple of times), after looking at whether the core temps are stabilized or not.
I would attach to this post the relevant screenshots, but while the max allowed attachments are three, the relevant .jpg are eight: so, any advice for a reliable and free image hosting service is welcome.
The test bed was an Intel DP67BG board fitted with a Core i7 2600K: it has been loaded with eight threads of Prime95 27.9 Build 1 64 bit Small-FFT, stock clock, stock voltage, "fixed" fan speed (around 680rpm, or if you may rather, something in between from 659 to 691rpm), while the reference fan was the Kotetsu one, the Scythe SY1225HB12SM-P.
Summarizing, results are shown in this sort of table right below (isn't there any formatting tool better than "code"? )
Heatsink Reference Fan Two Fans
Archon 55/57/59/54 (Avg. 55) 50/52/56/49 (FHP141 - 550rpm)
Armageddon 52/55/56/52 (Avg. 54) 51/54/56/51 (Vortex - 490rpm)
Hyper 212+ 57/61/62/58 (Avg. 59)
Kotetsu 54/56/57/53 (Avg. 55)
TrueSpirit 120M 54/56/57/53 (Avg. 55)
Intel Stock 82/83/84/80 (Avg. 82)
Well, thanks to Das_Saunamies advice, I just hosted the relevant shots at imgur, so just for some graphic redundancy, here they come (sorry, but I have still to learn whether I could make some smaller thumbnails within imgur): Thermalright Archon SB-E X2 with Scythe SY1225HB12SM-P @ ~680rpm Thermalright Archon SB-E X2 with 2 x Silverstone FHP141 @ ~550rpm Prolimatech Armageddon with Scythe SY1225HB12SM-P @ ~680rpm Prolimatech Armageddon with 2 x Prolimatech Ultra Sleek Vortex 14 @ ~490rpm Cooler Master Hyper212+ with Scythe SY1225HB12SM-P @ ~680rpm Scythe Kotetsu with Scythe SY1225HB12SM-P @ ~680rpm Thermalright True Spirit 120M with Scythe SY1225HB12SM-P @ ~ 680rpm Nidec F90T12MS1Z (Intel stock heatsink) @ ~2000rpm
Whether you may need any further explanation, just ask: I will be glad to help, if I will be able.