Thermaltake TR2 M21 RX A4021 CPU Cooler for the Intel Processor 115W LGA775-Prescott

• Designed for the Intel Processor 115W LGA775-Prescott
• Radian Aluminum fins provide optimal airflow for good heat dissipation
• High-precise riveting technology to bond the copper core for maximum heat conductivity
• Powerful and silent reversed fan, reduce the noise from air-rebounding, only 18dBA
• Push pin design requires no tool to install

As a previous reviewer said, you need to remove the fan to install it right. I did not believe first and struggled to do the "easy" way. After 15 minutes of frustration, I finally removed the fan and it was secured in 60 seconds.

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In order to mount this HSF to a motherboard correctly, you must first remove the fan, and then the fan mount. only then can you access the mounting clips for the heatsink.

while it works acceptably well, I wouldn't buy another.

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If you're looking for a "plug n play" CPU cooler, this may not be your best choice. It comes with no instructions on how to use the mounting, so there's no help if you've never used this type of fan mount. The locking tabs which hold the assembly to the motherboard are directly beneath the screws holding the fan in place, so they are almost impossible to manipulate with your hand, and impossible to reach with a screwdriver (the irony being that they have a slot in the top for using a screwdriver). Since the pressure fit tabs did not easily lock to my motherboard (Intel), I had to remove the four fan mounting screws, then the four screws holding the fan mounting bracket, before I could work directly with the locking tabs to hold the heatsink in place. Then I had to be careful not to apply too much pressure when re-mounting the fan bracket and fan, because a little too much pressure caused the locking tabs to pop out of the motherboard and I had to start over. This might be a little easier if you install it on the motherboard outside of the case, but I didn't try that approach. It's been running about a week now without any issues, but the motherboard is oriented vertically in my case, so I'm not feeling very confident about how long it will hold. On the plus side, it is very quiet. Be careful because it comes with the heat transfer gel already applied, so don't let the CPU contact area touch anything while you're getting ready to install.

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Thermaltake was a brand I held in high esteem. So when it came to buying a CPU fan for my computer, I did not think twice about purchasing the TR2 M21. Well the first one I purchased lasted about 8 months. Then the fan seized over the weekend and I found myself looking for another fan locally. The selection around town was less than desirable. It was either buy another TR2 M21 or spend $80+. (Hindsight is always 20/20) But I went against my better judgment and purchased another TR2. That was only 5 months ago. Now I am in the market for yet another CPU fan, as my current TR2 suffered the same fate as the first.

It is possible Thermaltake's higher end equipment is better quality. However from my experience, I would strong discourage anyone from purchasing this CPU fan.

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I have two P4 machines, socket 775 and one Celeron D machine, same socket. When I needed a new cooler for one of my P4 machines I took the one from the Celeron and attached it so the P4 could keep running imeadiately.

I then ordered this one for the celeron, and it doesn't fit, not even close.

The copper is round, meaning that on either my P4 or Celeron machines only about 80% of the square proccessor surface area would be in direct contact.

Also, the Unit is square, all three of my socket 775 machines require rectangular mounting.

I don't know what this fits, but of my three socket 775 mother boards, none of the above.