More Speed By Tightening Latency Timings

03:00 - Monday 27 February 2006 by Bert Töpelt
Source: Tom's Hardware – Keywords: in, search, of, true, ddr2, bleeding, edge, memory, uk

Table of content:
6 – More Speed By Tightening Laten...
  1. 1 – Optimal DRAM For Overclocking
  2. 2 – DDR2 Parts Details
  3. 3 – Two DRAM Sides Are Better Than One
  4. 4 – BIOS Settings To Boost Performance
  5. 5 – CL4 Or CL3: Boosts Performance By Up To 5%
  6. 6 – More Speed By Tightening Latency Timings
  7. 7 – Boosting Memory Clock Speed: 23% Performance Gains
  8. 8 – Here's How We Tested At THG's Munich Labs
  9. 9 – Wstream And Everest Benchmarks
  10. 10 – Overclocking Tests And Motherboards Used
  11. 11 – Default Settings Test: DDR2-667
  12. 12 – Default Settings Test: DDR2-667, Continued
  13. 13 – Overclocking By Tightening Timings
  14. 14 – Overclocking By Tightening Timings, Continued
  15. 15 – Overclocking To The Max
  16. 16 – Overclocking To The Max, Continued
  17. 17 – Only Asus Boards Convince
  18. 18 – An Overview Of The 16 Test Candidates
  19. 19 – Aeneon DDR2-533: Unbeatable Price/Performance
  20. 20 – Buffalo's DDR2-667 Is Unspectacular, But Solid
  21. 21 – Corsair DDR2-1000: Absolutely The Fastest
  22. 22 – Crucial/Micron DDR2-667 (Ballistix) Is Geared For Overclocking
  23. 23 – GeIL's DDR2-533 Fails To Impress
  24. 24 – G.Skill's DDR2-675 Confusing Label
  25. 25 – Kingmax DDR2-667: Choose The Chip's Colour
  26. 26 – Kingston DDR2-900 Offers Minimal Overclocking
  27. 27 – Mushkin DDR2-667's Double-Sided Module With A Need For Speed
  28. 28 – OCZ DDR2-800: The Third-Fastest Test Candidate
  29. 29 – Patriot Memory DDR2-1000 Offers Top Performance Reads At 8.6 GB/sec
  30. 30 – PQI's DDR2-667 Is Fast, With No Overclocking Headroom
  31. 31 – Samsung DDR2-667: Conservative RAM Sans Overclocking
  32. 32 – Twinmos' DDR2-667 Is Slow, But Overclocks Well
  33. 33 – Wintec's (AMP) DDR2-667: 475 MHz When Overclocked
  34. 34 – Conclusion

More Speed By Tightening Latency Timings

Ad

We conducted the following latency timing test with an FSB speed of 1066 (266 MHz) using the premium Corsair CM2X512-8000UL memory modules.

An overview of speed improvements as they relate to latency timings:

Module Latency Speed (CL X.0-3-3-8) FSB 1066
Latency Read Write Latency
CL 3.0 7458 MB/sec 2499 MB/sec 76.9 ns
CL 4.0 7435 MB/sec 2447 MB/sec 80.1 ns
CL 5.0 7405 MB/sec 2375 MB/sec 81.9 ns
Latency Read Write Latency
CL 3.0 100.7 % 105.2 % 106.5 %
CL 4.0 100.4 % 103.0 % 102.2 %
CL 5.0 100 % 100% 100%

Even at a high FSB speed of 1066, boosting CAS latency to 3.0 barely improves memory read speeds, but memory write speeds improve on the order of 5%.

The speed improvement that results from tightening latency timings at an FSB speed of 800 (200 MHz) is likewise only minimal. Thus, it makes no sense to leave the FSB speed unchanged, and only boost memory timings. This strategy does not offer enough gains to justify purchasing high performance, but more expensive, low-latency RAM.


Talkback
Be the first to comment on this review!

Note You are going to post a comment as anonymous.



  •
Submit my comment
Google Ads