I've reviewed and tested many cpu coolers but never have I had one that has to be bolted to the motherboard. THIS COOLER DOES REQUIRE THAT YOU HAVE THE FOUR HOLES AROUND THE ZIF SOCKET ON YOUR MOTHERBORAD!! Fits any Pentium 4, Socket A, FCPGA or Socket 370 with holes around the ZIF socket. But is it any good? It's an all aluminum heatsink surrounded by a plastic casing. First the specs:

• Dimensions: 91 x 66 x 70mm
• Fin Length: 18mm
• Wing Height: 42mm
• Number of Wings: 56~62 sheets
• Wing Thickness: 0.3mm
• Heat Dissipating Material: Aluminum
• Weight: 230g
• Heat Dissipating Area: 960~1060 cm2

• 0.40deg C/W (5V Silent Mode)
• 0.33deg C/W (7V Quiet Mode)
• 0.27deg C/W (12V Normal Mode)

• 1) CNPS-5001AL FHS assembly
• 2) FHS assembly Fan (6025)
• 3) Four Bolts A (59~63mm)
• 4) Four Bolts B (42~47mm)
• 5) Four Bolts C (16~13mm)
• 6) Four Nipples (spacers)
• 7) Four Tapered Springs
• 8) Four Washers A (6mm)
• 9) Eight Washers B (8mm)
• 10) Thermal Grease
• 11) Noiseless Connector RC100(Length : 60mm) Noiseless Connector RC56(Length : 90mm)
• 12) Spare Components

• Automatic Restarting Capability, 5VStart, MLS (Magnetic Levitation System)
• Dimensions: 60 x 60 x 25 mm

• Noise Level: 20 dB/A
• Fan Speed: 1900 RPM
• Airflow: 11 CFM

• Noise Level: 25 dB/A
• Fan Speed: 2500 RPM
• Airflow: 18 CFM

• Noise Level: 32 dB/A
• Fan Speed: 4500 RPM
• Airflow: 28 CFM