The Ultra Quiet AK-875BL is a high performance four heatpipe cooler. The 7mm solid copper base provides maximum heat absorption, the four hi-speed heatpipes guarantee rapid heat... more
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Features: Variable fan speed, blue LED x4, heat pipe technology, Heat pipe technology
Heatsink
Heatsink Dimensions: 95 mm x 93 mm x 47 mm, 93 mm x 91 mm x 47.1 mm
Heatsink Material: Aluminium with copper base
Manufacturer's product description
The Ultra Quiet AK-875BL is a high performance four heatpipe cooler. The 7mm solid copper base provides maximum heat absorption, the four hi-speed heatpipes guarantee rapid heat transfer and the heatsink technology utilizing 47 bonded-fin fins ensure efficient thermal dissipation. The translucent fan frame and misty blue fan blades are illuminated by four hi-bright blue LED adding color and style to the system.The 92mm fan blades provides quiet operation with high air pressure. 4-pin PWM technology enables motherboard RPM control via PWM or by DC regulation (Cool n' Quiet). Double cam-lever clip ensures easy installation and safe retention. Hi-grade thermal compound is pre-applied.
Advantages: Very cool, easy to install Disadvantages: copper on the cpu side far from mirror ( needs a polish )
...Test system:
processor - AMD Athlon FX62 (2 x 2800 MHz / 125W TDP)
motherboard - ASUS M2N32 DeLuxe Wireles Edition (passive cooling system with HeatPipe)
Cooler is very easy to install just one lever.
More experienced users will probably remove thermal compound and polish the surface of the cooler ( it is far from being a mirror ) and then apply high quality thermal compound.
This will give You another 1-2 C less and faster cooling down after stress.
all tests were done using Zalman STG 1 ( high quality thermal compound )
Temperature readings after 60 minutes in idle:
AkasaAK-876 37
Arctic Cooling 64PRO 38
Scythe Katana II 39
Temperature readings after 60 minutes in 100% load:
AkasaAK-876 56
Arctic Cooling 64PRO 58
Scythe Katana II 61
Temperature readings...
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Advantages: Non-conducting, easily applicable, very good cooling Disadvantages: tube is rather small, for approx 10 applications
...When buying a CPU or Graphics card, most manufacturers have already installed or included a heatsink + thermal conducting paste or pad with the product.
This thermal conducting paste is usually made of silicone, either grey or white and has the effect of filling the gaps between the heatsink and the chip, to improve heat transfer from one surface to the other.
So you are wondering why companies like Akasa produce heatsink paste when something is already included. The answer is that the Akasa product (TC 5022 Pro) performs significantly better than the standard one and holds its ground against other pastes (like Arctic Silver).
The paste comes in a small tube and is pretty expensive. The compound is made of silicone, but has the benefit that it is easily applied on surfaces, as well as performing very good, even when not applying too...
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