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TWIN2X4096-6400C5 gave memtest error... bad RAM or bad settings?


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I tried to answer this myself from reading the FAQs and other posts but couldn't figure it out, so I apologize if there's an obvious solution that I missed.


I'm building a new PC with all new parts. I have two sticks of RAM (TWIN2X4096-6400C5, ver3.2, 1.80V) that I put into a Gigabyte GA-G31M-ES2L, flashed it with the latest BIOS (F6), loaded Optimized Settings, then ran Memtest86+. A few hours later, it reported one error. So I removed one stick and ran Memtest again and it was fine after two passes. Then I swapped in the other stick, re-ran Memtest, and it's fine after three passes.


I'm about to put both sticks back in for another run, but I was wondering what could be wrong. Here are the settings -- everything is Auto and at stock speeds:


Memory Frequency: 800

CAS Latency Time: 5

DRAM RAS# to CAS# Delay: 5

DRAM RAS# Precharge: 5

Precharge delay(tRAS): 18


ACT to ACT Delay(tRRD): 3

Rank Write to READ Delay: 3

Write to Precharge Delay: 6

Refresh to ACT Delay: 42

Read to Precharge Delay: 3

Static tRead Value: 3

Static tRead Phase Adjust: 0


One thing that stands out is that this motherboard doesn't let you lower the DDR2 voltage, it only lets you add on top of the base voltage. So even though the RAM module says to use 1.80v, the BIOS reports that it's giving it 1.936v.


What do you guys think is wrong?




Gigabyte G31M-ES2L, E5200 Dual core, TWIN2X4096-6400C5

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