Pros: Under full load(about 76% CPU usage) it can keep my 3.4 Ghz prescott at 52.22degrees celsius with the fan speed at 1650 RPM's. (thats 120 degrees F) Thats almost no noise. If you want cooler temps, the manual fan speed control will let you throttle it up past 3000Rpm's, and that dropped it to 48.8 degrees C or 120 degrees F(under full load). At idle it kept temps between 37 and 39 degrees C,(around 100 degrees F) whether or not the fan speed was at 3000 Rpm's. When the fan is at full speed, it's still not that loud.

Cons: Its big. It fit it into my case with ease because I have a large case, however, I can see this being difficult for those with more compact cases.

Overall Review: This HSf doesn't have metal clips, but plastic ones that are not pressure clips. I haven't used this kind before, but it seems to be working okay. I also used Arctic Silver 5 on my HSF which probably resulted in slightly lower temps. Get the arctic silver people, its worth it.

Pros: Just installed today on an Intel D875PBX mobo, in a full-size case, without having to remove the motherboard. Initial cooling results are impressive - CPU idle temperature dropped about 10 degrees F, and idle case temperatures dropped by about 15 degrees F. Temperatures at load so far have been equivalently lower, as well. Since I have a P4 3.0GHz CPU, I didn't install Fan Mate.

Cons: None so far, other than the cautionary warning on the Zalman website about the weight of the shroud exceeding the Intel maximum weight on the CPU. It's not a problem during actual operation, but I'd dismount the shroud before moving the computer downstairs, just to avoid the possibility of broken pins.

Overall Review: I think the most important factors as to how pleased you'll be with this product are the size of your case (Mine is full-sized, so I'm happy) and how much air your case exhaust fans can move. The real benefit of this product is the plastic shroud, which aims hot air from the heatsink directly into your exhaust fans, instead of blowing it into your case. If your exhaust fans can move more air than the CPU fan blows at them, you'll be a happy camper. And like many others here, I used Arctic Silver from Newegg, instead of the Zalman-supplied thermal grease, as well as the companion ArcticClean products to remove residue from the old fan. I add my recommendations to those already here.

Pros: Very Quiet, cools well at low speed

Cons: The shroud provided is kinda hokey. This thing should be ducted directly to a case outlet for the highest efficiency.

Overall Review: I have had this thing installed in my HTPC for several years. It's on a P4 2.4C that already runs cooler than the Prescott E series cpus. The provided duct is huge and there was no way it was going to fit in my MicroATX case, so I cut up the clear plastic packaging that it came in and built my own custom duct to the rear grille of the case. Since this fan pulls air up through heatsink, the hot air from the cpu now goes directly out of the case. I have a passive fanless VGA card, so this HSF makes my HTPC system nearly silent, fan-wise.

Pros: Awesome. Extremely Quiet. The only noise is the whoosh of air. Continuously adjustable fan speed is a neat feature.

Cons: Huge with hood. Had a bit of a tough time getting it in/on, but I was making it harder than it was - it was actually extremely straight-forward.

Overall Review: I've never had a problem with overheating. I was just looking for a replacement for my CPU fan that I broke (oops). I took off the hood and reversed the fan direction. It was very easy to "jerry-rig," and I'm surprised more people don't do it, or at least haven't said anything about it. I have it dialed down to about 3000 RPM and I'm currently running at 37ish degrees centigrade with a Celeron processor, basically in idle...

Pros: Great replacement for stock fan

Cons: none

Overall Review: Snaps down securely on a stock Socket 478 mount. You do need a standard tower case for it to fit in and make sure it's not blowing air back toward another fan or you'll cut down the air supply and heat up the case. My stock cooler barely kept my Dual-Core 3ghz P4 below 65. With this and some Arctic Cool Silver 5 it's running a steady 36-40c!

Pros: The copper heat sink is great, a deffinate must for any heat sink for your processor, and it is amazingly quiet. The air duct is nice, it lines up perfectly with my exaust fan.

Cons: Its friggin huge, I got it and my jaw hit the floor, I was afraid that the plastic clips that secure it would break for sure. (Fortunatly they have not and I would not expect that from Zalman).

Overall Review: This was a much needed upgrade from my Thermaltake fan, I deffinate decrease is noise pollution and much better cooling.

Pros: Cools well, quiet

Cons: Heavy!

Overall Review: Replaced a very loud ThermalTake Spark 7+ HSF with this one. Don't get me wrong, the TT heatsink was great! But the fan sounded like a jet engine. This one is *much* quieter and cools a few more degrees C than the TT. Didn't buy it for the blue LED, but it's soft anyway. Not a harsh neon glow. However, this sucker is heavy! It's twice Intel's recommended weight for CPUs. I didn't have a problem installing it (moderate installation) and, as recommended, I won't be moving the machine around a lot. I don't anyway. Not sure what to tell people who do. Brought my temps down

Pros: 10 degrees cooler than the OEM intel heatsink. Nice and quiet. Im not an overclocker so this heatsink is perfect! Fan adjustability doesn't do anything for a p4 3.2ghz.. Must leave it at max.. Fan still quiet at 3100rpm.

Cons: The duct may not fit in many cases. I had to remove the bottom grill on my power supply fan to make it fit.. sometimes rubs on the fan but i push the power supply up to fix the issue.

Overall Review: on boot i measured 56 degrees with my oem intel heatsink.. with the Zalman i measured 46 degrees. After leaving my computer on for about 10 minutes in side my unventilated computer desk cubby whole it was still able to maintain 46-48 degrees. I used arctic silver paste from newegg