Jump to content
Corsair Community

TWIN2X2048-6400C4DHX and TWIN2X4096-6400C4DHX and ABIT IP35Pro


Recommended Posts



I recently purchased the above mentioned RAM modules and tried to upgrade my rig (currently using 2x1GB TWIN2X2048-6400C4DHX). With the 1GB modules in slots 1/3 and the other 2x2GB in the other slots I got BSOD. Testing with memtest gave me thousands of errors.

I tested all four modules at the same time then both new 2GB modules together and finaly each of them on it's own in the first slots. All testing was done with default BIOS settings (1.8v).

One of the new 2GB modules worked fine the other one crashed memtest and caused boot problems. Every combination of the modules with the faulty 2GB gave errors.


The modules were send back to an UK online shop and replaced. Today I got the new modules and had the same problem. One module is working and the other one doesn't boot at all. Bios post said C1 (Detect memory). To make sure that it's not a voltage problem I tried the faulty module with default CAS settings at 1.8v and at 2.1v. However neither setting worked.


As the old pair of 1GB modules is working perfectly on this motherboard I assumed that the new modules would work as well. The chance of getting two faulty pairs is probably not very high. So I'd like to know if there's a known compatibility problem with that motherboard.


Many thanks,


Link to comment
Share on other sites

It is never advised nor is it supported to mix and match modules versions. It is advised to drop the bandwith and increase the memory controller (motherboard) voltage if you wish to populate all four DRAM slots.

Download memtest from--->

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

Download CPU-z from


Shut the system down. Insert a single stick of DRAM in the first slot closest to the CPU. Restart, Enter your BIOS and

Load Setup Defaults. Save Setup Defaults and set to these values:



SoftMenu Setup

JumperFree Configuration Settings
AI Overclocking = Manual
CPU Ratio Control = Manual
- Ratio CMOS Setting = 10
FSB Frequency = 333
PCI-E Frequency = 100
DRAM Frequency = DDR2-667
DRAM Command Rate = 2T
DRAM Timing Control = Manual
CAS# Latency = 5
RAS# to CAS# Delay = 5
RAS# Precharge = 5
RAS# Activate to Precharge = 15
TWR = Auto
TRFC = 55
TWTR = Auto
TRRD = Auto
TRTP = Auto
DRAM Static Read Control = Auto

Transaction Booster = Auto
Boost Level = N/A
Clock Over-Charging Mode = Auto

CPU Spread Spectrum = Disabled
PCIE Spread Spectrum = Disabled

CPU Voltage = Auto
CPU Voltage Reference = Auto
CPU Voltage Damper = Auto
CPU PLL Voltage = Auto
DRAM Voltage = 2.1
FSB Termination Voltage = Auto
North Bridge Voltage = 1.40
North Bridge Voltage Reference = Auto
South Bridge Voltage = Auto

Advance CPU Settings

CPU Ratio Control = Manual
- Ratio CMOS Setting = 9
C1E Suppport = Enabled
Max CPUID Value Limit = Disabled
Vanderpool Technology = Disabled
CPU TM Function = Disabled
Execute Disable Bit = Disabled
PECI = Disabled

USB Configuration
USB Functions = Enabled
Legacy USB Support = Disabled


Run Memtest for two full passes, then (If Stable) enter Windows and post screenshots of CPU-z's CPU, Memory and SPD tabs.


Link to comment
Share on other sites



Thanks for your answer. That's basicaly what I meant with "All testing was done with default BIOS settings (1.8v). "


Thats what I did the other day:


I did a CMOS reset>single 2GB module in slot 1 (nearest to CPU)> one stick worked > removed this stick and put the other one in the first slot > bootet memtest CD > errors and crash> send them back to retailer.


Today I got the replacement, had a simmilar problem (actually a bit worse/no booting at all) and did what you recommended.


I tested the new 2GB sticks with the BIOS settings you posted > first I put one stick in slot 1 > didn't even boot (got a blank screen and the onboard POST code display showed the error as mentioned above) > removed that stick and put the other 2GB stick into the first slot > booted succesfully.


I wish I could test the sticks on another motherboard...




Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Create New...