Summary: I bought this fan for an Intel I7 930 heating at 80 degrees on idle and over 90 on playing. (Main reason : the computer is on 2nd floor). Now it gone at 40 degrees on idle and max 60 degrees on playing. Finally, you couldn have better fan for the moment. It's simply the best for the price and it's the more efficient.
Summary: I bought it for my son new build but i couldn't use it cause he got high heatsink RAM sticks. The only way to be able to use it would have been to put an 'X' on dual channel by using the two far slots for ram (don't give me dual channel on is Asus M5A97 r2.0) I'm keeping it for my own next rig . wooooo I know i can trust Zalman for their cooling device so i would recommend anyway.... mean all the way. But check your Ram height. Got good reviews all over the world.
Summary: TBH, I wasn't expecting to see the temps drop as much as they have, because my 1.5 yr old, mint condition Zalman CNPS 9900nt is no slouch. Normal summertime CPU temps.. IDLE : WAS (Artic Silver 5, MX-2) 32-39C. NOW (Zalman ZM STG2)28-35C GAMING : WAS 38-42C. NOW 32-36C. Minor cons aside, I am very happy with my 5 star purchase.
Pros: - its a Zalman, - water cooling temps, without the water, pump and hose .. woot !, - gaming temps are, - only $35 after MIR .. TY, NCIX and Zalman ! xD
Cons: - the nickel plating around some of the heatpipes, at the base, was not smooth. I noticed that it lightly scratched my lapped Phenom II x4/x6 960T, after the intial test run., Performance is better than expected, so I'm not too concerned., - The easy install could be made easier if the allan key was 5-15mm longer. Lucky for me .. I have long and skinny fingers. ;p
Summary: Fantastic cooler, runs very quietly and keeps the CPU nice and cool (not to mention it looks amazing)
My last cooler was a Zalman (CNPS9700) and it was still going strong after I replaced it with this one 5 years later.
But BEWARE! theCNPS12X is a massive cooler so make sure you have a big case.. .
I can also confirm that it will conflict with ram with any kind of tall heatsink (in my case it was Avexir ram in a Gigabyte UD3 motherboard.