AK-391 is a 2U chassis server cooling solution for AMD Opteron. The precision engineered copper heatsink with backplate and screws transfers the heat rapidly away from the CPU.... more
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AK-391 is a 2U chassis server cooling solution for AMD Opteron. The precision engineered copper heatsink with backplate and screws transfers the heat rapidly away from the CPU. Twin ball bearing fan ensures reliability and long life. Speed can be adjusted with an auto thermal fan.
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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I bought one of these on November 9, attracted by the large capacity and good energy rating. At first I was very impressed - it looks smart, the condensing bottle is at the top so convenient to empty, and it's very quiet. It easily handled the volume... more