In this review Frostytech is evaluating the stock heatsink that accompanies the majority of Intel Core 2 Duo E4xxx series processors (specifically, the E4400 model). The heatsink closely resembles many other Intel and third party RCBFH-based heatsinks, but is a little squatter owing to the moderate 65-85W thermal loads it faces.

The majority of stock socket 775 and socket 1366 Intel heatsinks are based on Intel's Radial Curved Bifurcated Fin Heatsink (RCBFH) design which is inexpensive to produce, easy to install, and generally very thermally efficient. The nice thing about Intel is that its heatsinks are guaranteed to work, and do so quietly for the most part. It may not be the coolest heatsink out there, but for that you have Frostytech to turn to!

The stock Intel Core 2 Duo E4400 heatsink uses a suspended 4-pin PWM 85mm diameter fan, an all aluminum extruded high aspect ratio extruded radially curved bifurcated aluminum fin body with solid aluminum insert. Per Intel's own requirements, the stock Core 2 Duo heatsink installs onto any LGA775 motherboard using tool free snap clips.

Intel stock Core 2 Duo E4400 Heatsink
	HEATSINK SPECSHEET Manufacturer: Intel Model No.: Stock Core 2 Duo E4xxx series Materials: Extruded aluminum, aluminum insert. Fan Mfg: Delta D95263-001 Fan Spec: 2000RPM, 12V, 0.60A Fan Dim: 25x85x85mm Heatsink & Fan Dim: 63x90x90mm Weight: est. 380 grams Includes: pre-applied thermal compound. Compatible with Sockets: LGA775 Est. Pricing: $10USD ($10CDN)

The stock Intel Core 2 Duo E4400 heatsink is composed of two sections - the first an outer ring of extruded aluminum with 26mm long curved bifurcated (split) cooling fins, the second an internal 33mm diameter solid cylindrical aluminum heat spreading core. The aluminum slug at the center makes direct contact with the processor integrated heat spreader, conducting the heat it absorbs out to the larger fin surface area.