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1 Stick, 2 Stick, Red Stick, Blue Stick? (aka Memtest86 fails with 2 sticks...)


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After RMAing 2 different sets of CM2X2048-8500C5D ram back to velocity micro im beginning to think its not the ram :)


Here's the rub: both Vista 64 and Windows XP 32 BSOD with various errors. Booting into an ISO CD of memtest86 I get massive errors when BOTH sticks are in. Remove either one and all is well. Tried switching them from slots 0,2 to 1,3 to dice.


Triple checked that the voltage is bumped to 2.1 -- tried 2.2 no dice either.

Triple checked the timings are 5,5,5,15 -- also tried 5,5,5,18 - no dice.


I am running in "CPUOC MAX" to get the full 1066.

Stock voltage on everything else.


What else can i provide to shed some light here?


Help. :)

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many thanks for the uber-prompt response. if the mobo MC is faulty how could it be stable with 2GB, but not 4? are their any settings you would have me try before i disasemble johnny-5? (no disassemble johnny-5!) seriously -- just getting the TEC waterblock off would burn a day... i hoping there is something we can try first. :)
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These are the changes I would make.

Download Memtest86+ V2.01 from--->

and extract the ISO image. Burn the ISO image to an CD-ROM disk.


SLI-Ready Memory = Disable
CPU Freq. MHz = 400
CPU Muliplier = 9
x FSB - Memory Clock Mode = Unlinked
x FSB Memory Ratio = Auto
x FSB (QDR), MHz = 1066
X MEM (DDR), MHz = 1066

[b]Memory Timing Setting[/b]

CL Cas Latency = 5
tRCD = 5
tRP = 5
tRAS = 15
Command Per Clock (CMD) = 2T
tRRD = 4
tRC = 28
tWR = 6
tWTR= 11
tREF = Auto 
tRD = 7.8
tRFC = 55
Async Latency = Auto

CPU Internal Thermal Control: Enabled
Limit CPUID MaxVal: Enabled
Enhanced C1 (C1E): Enabled
Execute Disable Bit: Enabled
Virtualization Technology: Enabled
Enhanced Intel Speedstep Tech: Enabled
LDT Frequency: 5x

PCIEX16_1 Frequency (Mhz): 101
PCIEX16_2 Frequency (Mhz): 101
PCIEX16_3 Frequency (Mhz): 101
SPP<->MCP Ref Clock, Mhz: 201 [/indent]

CPU Core = 1.5v
CPU FSB = 1.5
Memory = 2.2v (for version 1.xx) or 2.1v (for version 2.xx)
NForce SPP = 1.4v
NForce MCP = 1.55v
HT NForce SPP <--> MCP = 1.55v


Run Memtest for two full passes. When assured of stable DRAM, then enter Windows and Run CPU-z and post screenshots of CPU-z's CPU, Memory and SPD tabs.

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