Verified Purchase(What is this?)
This review is from: Zalman CNPS9900-NT CPU Cooler (Electronics)
Installed on a q6600 on an asus p5ke wifi in an antec p180 with ample room and without a problem except one of the 4 screws I remember was tight under the fan so you really need a right angled screwdriver or an extra stubby stubby which I've never seen before! I struggled with a normal one at about a 45 degree angle. As it slipped more as the screw got tighter I couldn't tell if I was getting even torque on the 4 screws, quite critical for a heat sink! I could of got a mini ratchet out with a screwdriver socket if I had more patience but you could thread the screw if you're not carefull.
Anyway the fan runs very quiet. My idle dropped by about 10 degrees (to 25/30), crysis gaming by about 20 and prime95 was still at 50 after 5 mins compared to hitting 75 and climbing after 1 min with the stock intel which was nice but then that intel heatsink was a pushpin type which are notoriously crap. I could never get the 4th pin to give the satisfying click noise that the other 3 did without fear of hearing an unsatisfying click noise from my mobo. So basically I will never know whether that's a fair comparison but at least my q6600 is set for an OC.
UPDATE: 2 years and counting :)
I just upgraded and was gutted when I realised neither of the included brackets fitted my p8z77. After much cursing of Zalman/intel, I was just about to purchase a socket 1155 bracket when I discovered it actually fits without a bracket to avoid the backplate, and they had included special backnuts for 1156 which is compatible. After much praising of Zalman I happily ripped out the stock i5 3570k fan and once again dropped my temperatures drastically. I can safely say these coolers kick the crap out of stock intels.