Originally Posted by ehume
...Vdimm (DRAM) is set to 1.62v, runs at 1.616v...
...Max temp hit 79c. Then BSOD = 0x00000101, which means insufficient Vcore....
So for a true novice here, can you help me understand?
I have the following memory (each pair in a separate bank...)
OCZ Reaper Edition 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model OCZ3RPR1333C9LV8GK62991272
OCZ Gold 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Low Voltage Desktop Memory Model OCZ3G1333LV8GK62896035
I had to go with the OCZ Gold for the bank with the DIMM slot closest to the processor because the Thermaltake Frio overlaps that first slot and the Reapers have these odd heatpipes and cooling plates that rise up 2" off the DIMM. The Gold just have normal heat spreaders and thus I could fit one under the Frio with room to spare (just to make sure I added the DIMM only AFTER the CPU and heatsink were all bolted in place.)
That doesn't mean that I don't have a possible cooling issue with that DIMM that's closest to the CPU...
I can't seem to OC the memory beyond 1333MHz at all. No amount of voltage seems to make any difference.
On the other-hand, I can underclock them and utilize lower latencies and that seems to work fine.
I'm currently at 4074 MHz on all four cores (194x21), TB disabled, C1E, C3/6, and EIST enabled. Running RealTemp to measure the temperatures and running a full 20 pass LinX peaks out at 94C, 93C, 89C and 90C (cores 1,2,3,4.) I know that's too hot, and if I drop back on the FSB just a couple of MHz the temps drop dramatically.
At 4011 (191X21) I never see higher than 84C on any core.
So my questions are:
1) What's up with the memory, and why can't I OC it at all? I've got the multiplier at 6X for a memory speed of 1164 MHz (194x6) with timings of 8-8-8-20. Voltage is left at AUTO, and per CPUID Hardware Monitor Pro it's running at 1.54v under load. The DIMMs are all labelled 1.65v and 9-9-9 timings (I assume at 1333 MHz.) Even to get a stable QPI/Vtt I'm at 1.39v otherwise BSoD. The BSoD for too low of QPI/Vtt appears to be 0x00000124, correct? (And too little Vcore is 0x00000101 as stated above?)
2) Since I can run six hours straight with the cores not getting over 94C, is that a safe situation given that this is not a gaming machine. I'm using it as a kick-a$$ daily workstation, so I rarely am using even a fraction of the power. It's just cool to know that it's there...
3) Or would I be better off dropping back to 191x21 = 4011 MHz so that I have another 10C of headroom? I can run the QPI/Vtt at a little lower 1.37v here without issue.
4) For my needs, would I see more of a difference in daily use with the bclk back at 133, thus the memory at 1333 MHz and the multiplier at say 30x? I could then leave the QPI/Vtt stock without issue.
Thanks in advance for all of your help! My last serious overclocking was with the 486/33, hitting 40 - 42 MHz. Back then the test to see if it was too hot was to hold your thumb on the CPU and if you could stand the heat you were good to go. If you couldn't take the pain, back off 1 MHz.
PS: My apologies also for getting OT from the 875... If this is too general a posting I'll take it to another forum. Thanks.Edited by skfurr - 10/12/10 at 6:56am