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The following displays heatsinks that recently tested at C/Ws of 0.30 or less. This is what we consider a reasonable target for for aggressive CPU cooling. The results are the average of motherboard tests; in most cases, these are a T-Bird on an Iwill KK266 and KK266+, Duron on an ABIT KT7 and a PIII on an Iwill BD133. Readers can click on heatsink names to display full test results and to determine suitability for Socket 370 use. Heatsinks will be added periodically.

In selecting a heatsink, readers are cautioned that Delta 38 and similar fans listed as “Loud” are found by many users to be objectionable; a number have abandoned these fans after a short time.

TEST RESULTS – Heatsinks At Least 0.30 C/W
Average of motherboard test results

C/W           0.10




Swiftech 462-A – 0.14

Delta 80mm – Loud on FAST Setting

Thermalright SK6 – 0.18

Delta 60mm – Loud

Swiftech 462-A – 0.20

Sanyo 80mm – Moderate

Millenium Glaciator – 0.20

Stock fan – Moderate

Dynatron DC1206BM-O – 0.21

Delta 60mm – Loud

Alpha PAL 8045 – 0.23

Orix 80mm – Moderate

Fortis A102 – 0.23

Delta 38 – Loud

OCZ Gladiator – 0.23

Delta 38 – Loud

Thermaltake Dragon ORB 3 – 0.23

Stock Fan – Loud

Thermalright CB-6L – 0.23

Delta 38 – Loud

Vantec CCK6035D – 0.23

Delta 38 – Loud

Zalman Flower – 0.24

Adda 80mm – Moderate

Thermosonic ThermoEngine – 0.25

Delta 38 – Loud

Global Win CAK38 – 0.27

Delta 38 – Loud

Thermaltake Volcano II – 0.27

Delta 38 – Loud

Power Cooler – 0.28

Stock Fan – Moderate

Speeze 5T060B1H3R BigRock – 0.28

Stock fan – Moderate

Swiftech MCX370-0A – 0.28

Papst 33cfm – Mod+

Tornado – 0.28

Panaflo 80mm – Moderate

Speeze CopperRock Heatsink – 0.30

Stock fan – Moderate

I will continue to test other heatsinks as they come in, but I can’t possibly test everything available. For other heatsinks not listed, please check the Heatsink Index for possible test results. To evaluate a heatsink not tested, read Heatsink Size As A Performance Indicator for an idea of how it might perform. Currently, anything with less than a 60 x 25 mm fan of YS TECH or better is not going to cut it, with Delta 38s being almost a necessity.

For an overview of what AMD recommends, see
AMD CPUs: How Hot Is Too Hot?

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