SPD Issue

Hello,

I have an enquiry to why my memory using CPU-Z states that my memory frequencies for the first and second slot are not 800MHz.

The first slot is at 622MHz and the second at 711MHz.

I have 4x2GB GSkill RipJawsX CL7 (7-8-7-24).

Another enquiry is that the actual timings of the RAM is 9-9-9-28 and am wondering why this is also.

Any help would be greatly appreciated.

Welcome to Tom's Forum!

Don't confuse the 'SPD' tab with the 'Memory' tab. 'SPD' tab shows the available Frequency (*1/2), CAS Timings, and Voltage available/encoded into the RAM. 'Memory' tab shows the actual Frequency (*1/2), and CAS Timings currently running on your PC. Keep in mind DDR3 stands for 'Double Data Rate - Revision 3', for the DRAM Frequency is 1/2 of the effective frequency; example if the DRAM Frequency = 667MHz then the RAM is running '1333MHz' to the BCLK/FSB.

Next by Default on most current systems the Frequency is going to be DDR3-1333 unless you manually set the DRAM Frequency or use 'XMP' (XMP is Intel only).

Q - What exact set of RAM? ; please provide a link
Q - What MOBO?
Q - What CPU?

If you post the above info then I'll provide you the proper settings.

F3-12800CL7D-4GBXM
DDR3-1600 7-8-7-24-2N @ 1.50v

If you're running (2) sets at DDR3-1867 (BCLK 103.72 MHz) I'd be surprised you're running them stable at CAS 7-8-7-24. I could see CAS 8 and with upped DRAM voltage. Otherwise, I'd run Prime95 + Blend 3~4 hours or more and/or Memtest for at least 4 full passes.

The explanation for the inconsistent 'SPD' is two sets with two different sets of IC's.

I did the Prime95 test and three trials were conducted with results:

Trial 1: one thread failed at 3 cycles.
Trial 2: one thread failed at 2 cycles.
Trial 3: BSOD on first cycle.

Therefore, concluding my PC is very unstable at that OC, however the other stress test for my CPU is stable for a long duration.

I am also running the RAM at extreme performance, would it be wise to turn that to turbo or even standard at the OC?