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The Theory Behind The Dream Cooler

A Cool Bunch: How To Put A Lid On The Die Temperature Of Your Athlon
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It's not hard to sum up what users expect of their dream cooler: it should be easy to mount and should run quietly. And it should offer enough extra cooling capacity so that you can upgrade your processor once or twice.

Specifications Of The Processor Maker

The most important design specifications given by AMD for an Athlon cooler and for the computer case are as follows:

  • Maximum total weight: 300 grams (for coolers that are affixed to the socket with a clip);
  • Maximum external dimensions: 60 x 80 x 60 millimeters;
  • The internal temperature, TA , immediately surrounding the cooler must not exceed 40° Celsius, no matter what the operating state of the CPU is.

General Physical Requirements

The cooling capacity/heat conduction provided by a cooler can be described by the following (extremely simplified) equation:

Iw = G*TD -TA with G=κ (A/l)

whereas


Iw : Heat flux
G: Heat conductivity coefficient
κ: Thermal conductivity of the cooler material
A: Surface through which heat flows (contact surface between die and cooler)
l: Path taken by heat flux
TD : Maximum acceptable die temperature according to specifications
TA : Temperature of the air surrounding the fan

According to this equation, the driving force for the heat flux Iw (Iw stands for the heat dissipated by the processor) is the difference in temperature between the die and the internal case temperature. For a given difference in temperature, the heat flux will be greater (in other words, more heat will be dissipated) the higher the thermal conductivity coefficient (or rather, the lower the thermal resistance) of the cooler is. And for the thermal conductivity coefficient to be high, the thermal conductivity of the cooler material needs to be as high, the contact surface as large and the path taken by the heat as short as possible.

Heat conductivity coefficients for different materials.
Summary
  1. A Round-up Of 55 Coolers For AMD Processors
  2. The Theory Behind The Dream Cooler
  3. Don't Lay It On Too Thick: The Tight Grease
  4. One By One - 55 Coolers On The Blocks
  5. Not Much Room Around The CPU: ALPHA FC-PAL15
  6. Plagiarism? ARKUA 6228 And 7528
  7. ARKUA 7528
  8. Evolution Of The Coolers: 112BN0, 112BJ0, 112BJ0-1 And 112C80
  9. Larger And Under A Hood: AVC 112BJ0
  10. More Powerful Fan: AVC 112BJ0-1
  11. Quieter But Heavier: AVC 112C80
  12. Nomen Est Omen: Brown International V8 Heatsink
  13. CoolerMaster
  14. Big, Heavy And High-quality: CoolerMaster HCC-003
  15. The Mighty Roaring Cube: CoolerMaster HCC-002
  16. Hot Pipes For High Speeds: CoolerMaster HHC-001
  17. A Cooler, Too: ElanVital FSCUG9C-6
  18. Evercool
  19. Looking Sharp: Evercool ND15-715
  20. A Dazzler: Evercool CUD-725
  21. Cooling For Next To Nothing: Foxconn
  22. Slow And Stealthy: GlacialTech Igloo2310
  23. Too Pretty To Hide: GlacialTech Igloo2400
  24. Ultra-silent: Global Win CAK - II 58
  25. Much Ado About Nothing: Global Win CAK - II 38
  26. Fan Tower: Global Win TAK68
  27. Italian Moments: Neolec Venezia TB
  28. The Thrill Is Gone: Neolec Vento
  29. A Dime A Dozen: Pent Alpha APSK0155
  30. Just Your Ordinary Cooler: Pent Alpha APSK0156
  31. Quiet And Flat: Spire 5P53B3
  32. Fraternal Triplets: Spire 5E34B3-H, Spire 5E34B3 And Spire 5E32B3
  33. II: Spire 5E34B3
  34. III: Spire 5E34B3-H
  35. AMD Under The Rocks: Spire 5T060B1H3R, Spire 5T061B1H3T And Spire 5T208B1H3T
  36. BigRock: Spire 5T060B1H3R
  37. SuperRock: Spire 5T208B1H3T
  38. Roaring Cooler Monsters For Overclockers: Swiftech MC462 And MCX462
  39. Evolution Vs. Revolution: Swiftech MCX462
  40. Little Bro I: Swiftech MCX370-0A
  41. "Little" Twin Bro II: Swiftech MCX C370
  42. Compact And Quiet Standard Cooler: Taisol CEK747092
  43. Easy Upgrading : Taisol CGK760092 And CGK760092B
  44. Weighty Double Decker: Thermaltake Dragon Orb 3
  45. Quiet Standard Fan: ThermoSonic V60-4210/Thermoengine
  46. The Eye-Catcher: Titan TTC-MT1AB
  47. Failure Sets Off Alarm: Titan TTC-D5 TB
  48. Standard Fare: TITAN TTC-D4 TB
  49. Valuable? Not Really: Tornado WIN-7528
  50. Loud But Powerful, Part I: TRIG T40-1-62538 And TRIG T40-3-62538
  51. TRIG T40-3-62538
  52. Loud But Powerful, Part II: TRIG T40-6-62538 And TRIG T40-7-62538
  53. TRIG T40-7-62538
  54. Plain But Effective: VANTEC FCE-6030D
  55. Bigger And Heavier: VANTEC FCE-62540D
  56. Copper Isn't Always Good: VANTEC CCK-6035D
  57. Quiet But Uncool: Verax P14
  58. Noisy Or Quiet: From 38 To 67 DB(A)
  59. Hot Or Cold: The Die Temperatures
  60. 55 Coolers At A Glance
  61. Conclusion
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