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The CPU Articles
Topics:

Write Performance

7:54 PM - May 23, 2006 by Bert Töpelt
Source: Tom's Hardware US – Keywords: amd, reinvents
Topics: AMD/ATI

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

Write Performance

Memory throughput when writing: only at high clock speeds can DDR2 memory better the throughput of the old DDR1.

When writing, things are even worse: here the performance of CPUs with lower clock speeds really falls apart. With a 2 GHz processor (Athlon 64 X2 3200+) the memory bandwidth is a whopping 200 MHz/sec below the DDR1 value, achieving a paltry 5.6 GB/sec. Only at high clock speeds - 2.4 GHz and above - does performance rise above the values of the old DDR1 memory.

The strong dependence of DDR2 memory on CPU speed represents a huge performance loss for midrange processors when compared against DDR1 versions. This is also reflected in the performance of practical applications.


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