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TWIN2X2048-6400C4 & Asus M2N32-SLI Deluxe Dual Channel problems


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Ok here is the issue I'm currently looking at. I had built my system and it ran great for 5months until the motherboard crapped out. I was running two pairs of TWIN2X2048-6400C4 on the Asus M2N32-SLI Deluxe without any issues. I exchanged my motherboard and re-built the machine just like I had it prior to the fault. The new build refuses to POST if I install the chips for Dual-Channel however I can boot successfully if I just install 2GB in a non-paired config. After reading the forums and using the information below, I must be missing something cause I still can't get it to POST in dual-channel. I have also sucessfully boot using each stick by itself leading me to believe all sticks are good. The only thing I can think of that I noticed to be different is this board was preloaded with a BIOS newer than the one I was using before. Should I reflash and revert to the previous BIOS? I know the memory works but but just strikes me as odd because I didn't have to configure the first time, plug 'n play worked fine.


Please help me before I kick this thing lol


EDIT: Oh, and I realized my PSU was on the small side to I have ordered 800W unit to replace it.


Motherboard make and model: Asus P5WD2 or M2N32-SLI Premium/Deluxe

Each pair is tested and packaged together using the following settings:

AI Over Clock Tuner: Manual

CPU External Frequency: Manually set to 200MHz

DDR2 SDRAM Clock: Manually set to 800MHz

PCI Express Freq: Auto

PCI Freq: 33.33

Performance Mode: Standard

DRAM Timing Selectable: Manual

SDRAM CAS Latency: 4T

SDRAM RAS to CAS Delay (tRCD): 4T

SDRAM Row Precharge (tRP): 4T

SDRAM Active to Precharge Delay (tRAS): 12T

SDRAM Write Recovery Time: 5

Write to Precharge Delay: 15 (If it's Listed)

Command Rate: 2T

DDR2 SDRAM Voltage: 2.1

Advanced voltage control

CPU Vcore offset:_Disabled

DDR2 Termination: 0.5x

CPU to NB HT:____1.200V

NB to SB HT:_____AUTO



SB Standby core:_+1.500V


Output driver control





Chipset Core Voltage: Auto

All other settings are motherboard defaults.

Maximum DDR2 recommended VDIMM: 2.1 Volts

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