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MSI P7N SLI weird system failures with 4 Gb of Corsair RAM


verotak

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I have been running my pc for about a year or more since when I have installed two additional modules of Corsair XMS2 DHX DDR2 PC2-6400 4-4-4-12 (2x1 Gb) and the final amount of RAM raised to 4 Gb. Few days before, I started a maintenance task that I repeat every 6 or so months in order to remove internal dust. In this task I disassemble every part and after proper cleaning I rebuild my system. When finished reassembling and booting windows, system won't entering Windows and system failure errors or BSOD were appearing on screen. The weird is that my system was fine before with all 4 Gb RAMs and these errors are appearing now, only when installing the 4th RAM module in the existing 3. Till 3Gb RAM my system is functional with every combination of RAMs modules in any slot.

Also as I mentioned my system was running without errors for more than a year. I have tested all different combinations of installing RAMs on all slots and there was no problem since all modules are functional. I also have updated my AMI Bios to v2.2 from 2.1 but there was no difference. Some of the problems that are appearing on my screen are BSOD errors, system freezes in windows logo, system restarts and STOP errors. These errors differ and depend from different installation of RAM modules in 4 slots. Furthermore I post below some of the errors that are appearing in my screen. I have 4 modules of RAM which their versions are v2.1, v.2.2, v5.1 #1, v.5.1 #2. The last two were not a set.

1st combination test

slot 1 (v2.1), slot 2 (v5.1 [1]), slot 3 (v2.2), slot 4 (v5.1 [2])

1st boot

Stopped after 1-2 minutes when it had entered in windows

BSOD

STOP: 0x0000001E (0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000)

2nd boot

Stopped in starting windows logo

3rd boot

Stopped in starting windows logo

 

2nd combination test

slot 1 (v2.1), slot 2 (v5.1 [2]), slot 3 (v2.2), slot 4 (v5.1 [1])

1st boot

Stopped in starting windows logo

2nd boot

BSOD

An attempt was made to write to read-only memory

STOP: 0x000000BE (0xFFFFF8800D20EFF8, 0x00000000BE8FA900, 0xFFFFF880009A97B0, 0x000000000000000E)

3rd boot

BSOD

An attempt was made to write to read-only memory

STOP: 0x000000BE (0xFFFFF8800B31EFF8, 0x00000000BEFFA900, 0xFFFFF880009A97B0, 0x000000000000000E)

 

3rd combination test

slot 1 (v2.2), slot 2 (v5.1 [1]), slot 3 (v2.1), slot 4 (v5.1 [2])

1st boot

Stopped in starting windows logo

2nd boot

Stopped in starting windows logo

3rd boot

Stopped in starting windows logo

 

4th combination test

slot 1 (v2.2), slot 2 (v5.1 [2]), slot 3 (v2.1), slot 4 (v5.1 [1])

1st boot

Stopped in starting windows logo

2nd boot

BSOD

BAD_POOL_HEADER

STOP: 0x00000019 (0x0000000000000020, 0xFFFFF8A00004C680, 0xFFFFF8A00004C680, 0x0000000005000113)

3rd boot

BSOD

An attempt was made to write to read-only memory

STOP: 0x000000BE (0xFFFFF880092C6FF8, 0x00000000BF042900, 0xFFFFF880009A97B0, 0x000000000000000E)

 

Moreover I have run also CPU-Z with two memory modules per time in slots 1 & 3. Also before this I checked for more than 10 tests each module of 4 dimms in slot 1 and there was no error.

 

1st CPU-Z test

slot 1

DIMM # 1

Memory type DDR2

Size 1024 MBytes

Max bandwidth PC2-6400 (400 MHz)

Manufacturer Corsair

Part number CM2X1024-6400C4DHX

Correction None

JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency @ Voltage

JEDEC #1 4.0-4-4-13-15 @ 270 MHz @ 1.80V

JEDEC #2 5.0-5-5-18-22 @ 400 MHz @ 1.80V

 

slot 3

DIMM # 2

Memory type DDR2

Size 1024 MBytes

Max bandwidth PC2-6400 (400 MHz)

Manufacturer Corsair

Part number CM2X1024-6400C4DHX

Correction None

JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency @ Voltage

JEDEC #1 4.0-4-4-13-15 @ 270 MHz @ 1.80V

JEDEC #2 5.0-5-5-18-22 @ 400 MHz @ 1.80V

 

2nd CPU-Z test

slot 1

DIMM # 3

Memory type DDR2

Size 1024 MBytes

Max bandwidth PC2-6400 (400 MHz)

Manufacturer Corsair

Part number CM2X1024-6400C4DHX

Correction None

SPD Ext. EPP 1.0

JEDEC timings table CL-tRCD-tRP-tRAS-tRC-Command Rate @ frequency @ Voltage

JEDEC #1 4.0-4-4-13-15 @ 270 MHz @ 1.80V

JEDEC #2 5.0-5-5-18-22 @ 400 MHz @ 1.80V

EPP#1 4.0-4-4-12-22-2T @ 400 MHz @ 2.10V

 

slot 3

DIMM # 4

Memory type DDR2

Size 1024 MBytes

Max bandwidth PC2-6400 (400 MHz)

Manufacturer Corsair

Part number CM2X1024-6400C4DHX

Correction None

SPD Ext. EPP 1.0

JEDEC timings table CL-tRCD-tRP-tRAS-tRC-Command Rate @ frequency @ Voltage

JEDEC #1 4.0-4-4-13-15 @ 270 MHz @ 1.80V

JEDEC #2 5.0-5-5-18-22 @ 400 MHz @ 1.80V

EPP#1 4.0-4-4-12-22-2T @ 400 MHz @ 2.10V

 

I also have seen some interesting infos in these sites:

http://forum.corsair.com/v2/showthread.php?t=68223

http://forum.corsair.com/v2/showthread.php?t=79164

But I am unsure if I should edit to 333MHz frequency and set other timings values to 4-4-4-12-24 in order to have 4Gb fully functioned. Furthermore the two modules in 1st CPU-Z test as I have seen they do not support EPP#1 timings, but in the back side of each memory module Corsair are written these timings (plus and in Corsair troubleshoot section as the first action that user should do).

 

Isn't weird that all that dimms were working fine, without changing nothing in BIOS for over a year? Furthermore dimms v.2.1 and v2.2 i had bought and installed them personally in 1 March of 2008 and both dimms v.5.1 had been bought by another person in 29 April of 2008 and purchased and installed them by me in 19 November of 2010. So why could this malfunction has arisen now? I think that I should take a shot to change each dimm's timings to 4-4-4-12-2T @ 800 MHz @ 2.1V and check it out if these settings stabilize the total use of 4 dimms.

What could you suggest to me to do? Thanks for your time in advance.

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I tried the solution that had written in Corsair site (http://forum.corsair.com/v2/showthread.php?t=68223) and till now I have 4Gb of RAM as before. I followed the following procedure for everyone who come across with such problem. I installed all 4 modules and when started my PC I entered BIOS. the modules were installed as following: slot 1 > v 2.1, slot 2 > v 5.1, slot 3 > v 2.2, slot 4 > v 5.1. Firstly when entered BIOS, I modified voltage to 2.10V and secondly set manually the timings to tCL = 4, tRCD = 4, tRP = 4, tRAS = 12, tRC = 24 while I left CR to auto. Finally I set DRAM frequency to manual and set it to 667 MHz. CPU-Z posted the following data:

 

Type: DDR2

Size: 4096 MBytes

Channels#: Dual

Frequency: 333.3MHz

FSB:DRAM: 4:5

CAS (tCL): 4.0

RAS to CAS (tRCD): 4

RAS to Precharge (tRP): 4

Cycle Time (tRAS): 12

Bank Cycle Time (tRC): 24

Command Rate (CR): 1T

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