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P5WDH and TWIN2X4096-6400C5 incompatible?


emilyg

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Hi,

 

I've bought two TWIN2X4096-6400C5 kits (so the total is 8Gb) as we need it for our work. I've got this on a P5WDH motherboard with the latest BIOS and also have a E6750 installed.

 

However running everything at AUTO i get wierd/inconsistent clock speeds. Whats the best way to configure this board to go with the Corsair ram? At the moment I've got it at Overclock Profile FSB1333/DDR-667 and it boots at 2.66Ghz and PC4300 RAM.

 

I also noticed that running Memtest will fail if I have all four sticks inside, where as 2 sticks (4Gb) will work OK (both were tested with one pass on each package).

 

Do I need to bump up the voltage sent to the memory? The specifications state 1.8v for these.

 

Any help is greatly appreciated.

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The load and access of 8GB of four modules is marked in comparison to 4GB of two modules.

Download Memtest Version 2.11 from--->

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

Download CPU-z from
.

Please Enter your BIOS and set to these values, save and shut down.Try these settings:

 

Configure System Frequency/Voltage

  • AI Overclocking = Manual

  • CPU Frequency = 333

  • DRAM Frequency = 667MHz

  • Performance Mode = Auto

  • PCI Express Frequency = 100

  • PCI Clock Synchronization Mode = 33.33

 

  • Memory Voltage = 1.9v

  • CPU Core Voltage = Auto

  • FSB Termination Voltage = Auto

  • MCH Chipset Voltage = 1.6v

  • ICH Chipset Voltage = Auto

Advanced Chipset Settings

  • Configure DRAM by SPD = Disabled

  • DRAM CAS# Latency = 5

  • DRAM RAS# Prechardge = 5

  • DRAM RAs# to CAS# Delay = 5

  • DRAM RAS# Activate to Precharge: 15

  • DRAM Write recovery Time = 6

 

Leave all else on AUTO settings. Boot to the CD and allow a few passes. If stable, enter Windows and please post screenshots of CPU-z's CPU, Memory and SPD tabs.

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