AM2: AMD Reinvents Itself

All New AM2 Processors

AMD is fitting the AM2 socket with 17 new processors with the DDR2 memory interface, including six Sempron CPUs, two new Athlon 64s and a top model: the Athlon 64 FX-62 with 2.8 GHz. According to AMD, processors for Socket 939 will continue to be available, but no new models will be developed.

The new top CPU from AMD: The Athlon 64 FX-62

The Athlon 64 FX-62 is now clocked at 2.8 GHz

The fastest available Athlon 64 with 2.6 GHz

The switch to DDR2 means that the CPUs need a stepping update. The old E stepping was replaced in both the Athlon 64 and Athlon 64 FX by the new F revision. This has also raised the number of transistors slightly; among the processors with 1 MB L2 cache, the number of transistors has grown from 223.5 million to 227.4 million, while those with 512 kB cache have increased from 150 million to 153.8 million. The models with 1 MB have a die surface area of 230 mm². The processors with 512 kB Cache usually cover 183 mm², but may also be the same size as a 1 MB CPU, if the active cache is cut in half. The new CPUs continue to be manufactured using 90 nm process technology.

AMD Athlon AM2 Processors
Model Clock Speed Core L2 Cache Memory Clock
FX-62 2.80 GHz Dual 1 MB DDR2-800
X2 5000+ 2.60 GHz Dual 512 kB DDR2-743
X2 4800+ 2.40 GHz Dual 1 MB DDR2-800
X2 4600+ 2.40 GHz Dual 512 kB DDR2-800
X2 4400+ 2.20 GHz Dual 1 MB DDR2-733
X2 4200+ 2.20 GHz Dual 512 kB DDR2-733
X2 4000+ 2.00 GHz Dual 1 MB DDR2-800
X2 3800+ 2.00 GHz Dual 512 kB DDR2-800
3800+ 2.40 GHz Single 512 kB DDR2-800
3500+ 2.20 GHz Single 512 kB DDR2-733
3200+ 2.00 GHz Single 512 kB DDR2-800

Taking a close look at the CPU list, along with the processors' properties and memory clock speeds, it's plain to see that the 5000+ is surplus to requirements. The 4000+ is included as a new candidate in the middle, which wasn't around for Socket 939.

AMD Sempron AM2 Processors
Model Clock Speed Core L2 Cache Memory Clock
3600+ 2.00 GHz Single 256 kB DDR2-800
3500+ 2.00 GHz Single 128 kB DDR2-800
3400+ 1.80 GHz Single 256 kB DDR2-720
3200+ 1.80 GHz Single 128 kB DDR2-720
3000+ 1.60 GHz Single 256 kB DDR2-800
2800+ 1.60 GHz Single 128 kB DDR2-800

The Sempron now has more than 81.1 million transistors. All previous Sempron models were only available for Socket 754 and had to make do with a single-channel memory interface. That is a thing of the past at AMD, as all CPUs for the new Socket AM2 have a dual-channel interface. Because the Sempron still has a very small cache of 128 kB or 256 kB, it depends on high memory bandwidths. All Sempron fans can now look forward to faster speeds on the new platform.

  1. The AMD Generation Comes Of Age
  2. New Socket AM2 With DDR2
  3. Memory Speed: Socket AM2 Vs. Socket 939
  4. Write Performance
  5. Write Performance, Continued
  6. Write Performance, Continued
  7. Memory Speed: AMD Vs. Intel
  8. Memory Speed: AMD Vs. Intel, Continued
  9. The Divider Problem
  10. DDR2 SLI Memory: 10.3 GB Per Second
  11. Automatically Overclocking SLI Memory
  12. Automatically Overclocking SLI Memory, Continued
  13. All New AM2 Processors
  14. The New Socket AM2 With 940 Pins
  15. New Retention Module Requires New Heatsink
  16. Low Dissipation Guaranteed
  17. New Energy-efficient Processors
  18. Heatsinks: Things Gets Louder, Continued
  19. Features: Virtualization And TCPA
  20. Price Comparison: AMD More Expensive Than Intel
  21. Motherboards
  22. Gigabyte
  23. Epox
  24. The New nForce5 Chipset For AM2
  25. LAN Interface With 2 Gbit/s
  26. Test Setup
  27. Benchmarks And Settings
  28. Benchmarks Socket 939 Vs. Socket AM2
  29. Games - DirectX
  30. Games - DirectX, Continued
  31. Video
  32. Video, Continued
  33. Video, Continued
  34. Video, Continued
  35. Audio
  36. Applications
  37. Applications, Continued
  38. Applications, Continued
  39. Multitasking, Continued
  40. Synthetic Benchmarks
  41. Synthetic Benchmarks, Continued
  42. Synthetic Benchmarks, Continued
  43. Synthetic Benchmarks, Continued
  44. Synthetic Benchmarks, Continued
  45. Evaluating The Benchmark Scores
  46. Athlon 64 X2: Now Somewhat Slower
  47. Benchmarks AMD Vs. Intel
  48. Games - DirectX
  49. Games - DirectX, Continued
  50. Video, Continued
  51. Audio
  52. Applications
  53. Applications, Continued
  54. Multitasking
  55. Synthetic Benchmarks
  56. Synthetic Benchmarks, Continued
  57. Synthetic Benchmarks, Continued
  58. Synthetic Benchmarks, Continued
  59. Synthetic Benchmarks, Continued
  60. Synthetic Benchmarks, Continued
  61. AMD Athlon 64 FX-62 Vs. Intel Extreme Edition 965
  62. Conclusion: Good Energy Efficiency, But A Bad Value For Money
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