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AVC Z7U7408001 Heatpipe P4 Heatsink Review
AVC Z7U7408001 Heatpipe P4 Heatsink Review
Abstract: The AVC Z7U7408001 is an amazingly powerful heatsink, the name isn't very consumer friendly, so bear with me as I get used to typing out a 10-digit product number...

 Manufacturer  Category  Published  Author 
AVC   Cooling / Heatsinks   May 02, 2004   Max Page  

Home > Reviews > Page: Examining the Heatsink

AVC Z7U7408001 Heatsink From All Angles
The Fan:
The AVC Z7U7408001 makes use of a plastic fan shroud to hold the fan in place, and direct the air flow over both sets of fins. The fan spins at 5400RPM, and is protected with a wire grill. The 3-pin power cable is supposed to be 160mm long, but for whatever reason, is just 75mm on the unit we received. This is an unrealistic length of cable for a fan.

Heatsink Top:
The fan draws air in and exhausts it over two sets of separate cooling fin. The first is an extruded aluminum section which measures 37mm thick, 66mm wide, and features fins 1.8mm thick, spaced 2mm apart. The base is comprised of two parts over the processor, with a total thickness of 12mm. The copper plate is just large enough to cover the Pentium 4 core, and is 4.5mm thick. Its only purpose is to hold the heatpipes in place, and distribute heat evenly to each one.

Side A:
From the side, you can only really see the plastic fan shroud which holds the fan to the rest of the heatsink. It locks into little tabs at the base of the primary heatsink, and is better than the equivalent in aluminum because it won't rattle if there are any vibrations. The heatsink is ~83mm tall, making it a good choice for compact cases.

Side B:
The twin 6mm diameter copper heatpipes are spaced 17mm apart, so they should actually sit directly above the core of the Pentium4 when the heatsink is installed. After exiting the extruded aluminum section, the fins make a 90 degree turn and transfer what heat remains to 39 stacked, 0.3mm thick, Al-1050 aluminum fins. This set of fins receives a more even, and slow flow of air over its surface than the primary set. The fins are spaced 1.5mm apart.

Heatsink Base:
The base of the AVC Z7U7408001 come with a layer of pre-applied ShinEtsu G-751 thermal paste. To keep results consistent, Frostytech removes all thermal pastes/compounds, and applies CoolingFlow ceramic-based thermal compound for our tests. ShinEtsu make good product, so end-users do not need to worry about replacing this material with something else. The surface finish of the copper base is pretty good, but there sign of some very slight waviness (due to the heatpipes below). The surface texture is softly sanded.

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Table of Contents:

 1:  AVC Z7U7408001 Heatpipe P4 Heatsink Review
 2: — Examining the Heatsink
 3:  Heatsink Thermal/Acoustic Test Parameters
 4:  Surface Roughness, Acoustic recordings and measurements
 5:  Final Heatsink Temperature Comparisons

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