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How reliable is SPD?

Tags:
  • Memory
  • Motherboards
Last response: in Memory
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March 19, 2010 4:54:20 PM

When I installed my memory into my motherboard (specs in signature), the default (AUTO) multiplier and timings were below the specifications of the memory. I can't run the memory at full speed due to stability issues which I'm investigating, but I want to ask how reliable SPD information is, because this what is displayed for my 8-8-8-24 modules.

  1. CPU Host Clock Control [Auto]
  2. CPU Frequency(MHz) 200
  3. Set Memory Clock [Manual]
  4. Memory Clock [x6.66] 1333Mhz
  5. DRAM Configuration [Press Enter]
  6. DCTs Mode [Unganged]
  7. DDR3 Timing Items [Auto] SPD Auto
  8. CAS# latency [Auto] 7T 9T
  9. RAS to CAS R/W Delay [Auto] 7T 9T
  10. Row Precharge Time [Auto] 7T 9T
  11. Minimum RAS Active Time [Auto] 30T 30T
  12. 1T/2T Command Timing [Auto] -- --
  13. TwTr Command Delay [Auto] 4T 5T
  14. Trfc0 for DIMM1 [Auto] 110ms 110ms
  15. Trfc0 for DIMM2 [Auto] -- --
  16. Trfc0 for DIMM3 [Auto] 110ms 110ms
  17. Trfc0 for DIMM4 [Auto] -- --
  18. Write Recovery Time [Auto] 8T 10T
  19. Precharge Time [Auto] 4T 5T
  20. Row Cycle Time [Auto] 27T 33T
  21. RAS to RAS Delay [Auto] 4T 5T
  22.  
  23. also
  24.  
  25. DRAM Voltage Control [1.650V]



Of course when I run the memory at full speed with the timings in the SPD column, the motherboard refuses to use the settings "due to overclocking" and reverts to 1066 MHz. Thus, if I try to run at full speed with 8-8-8-24, and the SPD settings for precharge time and row cycle time, can I also expect errors? Is the SPD column twaddle?

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March 19, 2010 5:28:17 PM

Why can't I edit my post? I don't want people to miss the paragraph which was accidentally subsumed into line 28!
!