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System Reboot. Think it is bad RAM


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My system seems to reboot/crash at random points for no apparent reason.

 

The system is up-to-date with the latest BIOS and drivers. The system has never been previously overclocked.

 

It has started to become alot more frequent recently. I have re-installed a fresh copy of MS Windows, checked all the connections. Uninstalled and reinstalled the RAM, Heatsink and SATA drive.

 

I have checked the temperatures and they are

CPU 21c | SYS 33c | PWM 37C

GPU CORE 66C | Ambient 46C

 

I have contacted ABIT regarding this and they recommended I try decreasing the FSB Manually to 200Mhz and increasing the DDRV to 2.70V and 2.80V respectively.

 

I did exactly as they had said but that still did not resolve the problems.

 

I then ran memtest86. I ran memtest86 for 13.5 hours continously and that provided no errors.

 

I then tried to eliminate what could have been the cause. I removed all PCI cards, and all hard drives apart from the 80gb hard drive for the OS. and only left the NEC DVDRW and the 1gb of ram installed.

 

I CMOS'd the BIOS to default settings and proceeded in installing a fresh copy of windows. Upon doing so the computer crashed twice during install. The first time it crashed it presented a BSOD with the following error.

 

CDFS_FILE_SYSTEM

 

STOP: 0x00000026 (0x000401F4, 0xF73E1FA0, 0xF73E1C9C, 0xF79B7EF8)

 

*** cdfs.sys Address F79B7EF8 base at F79B3000, DateStamp 41107eb1

I reset the system and re-installed windows and it crashed again with 7 minutes left on the install procedure. This time it did not present a BSOD but it freezed.

 

I reset and re-installed Windows for the 3rd time and it installed successfully.

 

I then went ahead installing all the latest drivers. Whilst downloading the latest drivers from the net, the system rebooted twice.

 

1st time, no BSOD

2nd Time, BSOD with the error message:

 

STOP: 0x0000008E (0xC0000005, 0xBF83BC6F, 0xF6B2B3CC, 0x00000000)

 

win32k.sys - Address BF83BC6F base at BF800000, DateStamp 41107f7a.

 

I then tried a different PSU. I installed a QTEC 400W PSU and left the PC downloading files from the net. After approximately 2 hours it had BSOD with the following error message.

 

DRIVER_IRQL_NOT_LESS_OR_EQUAL

 

STOP: 0x000000D1 (0x0000000C, 0x00000002, 0x00000000, 0xF48598DD)

 

tcpip.sys - Address F48598DD base at F483A000, DateStamp 43c7103c

 

I checked the Event Viewer for any errors but it did not present any around the time that the system had crashed.

 

I took out one of the Corsair TwinX memory module so that system is now running with only 512MB in Single mode memory.

 

I ran the memtest86 overnight for 9.5 hrs = no errors.

 

I then ran Prime95 Torture Test>blend for 2 hours with no errors

Next I ran Prime95 Torture Test>Small FFT's and it came up with an error after 14 minutes of running the test.

 

This is the screen it showed on Prime95 when it halted:

 

Beginning a continuous self-test to check your computer.

PIease read stress.txt. Choose Test/Stop to end this test.

Test 1, 800000 Lucas-Lehmer iterations of M172031 using 8K FFT Iength.

Test 2, 800000 Lucas-Lehmer iterations of M163839 using 8K FFT Iength.

Test 3, 800000 Lucas-Lehmer iterations of M159745 using 8K FFT Iength.

Test 4, 800000 Lucas-Lehmer iterations of M157695 using 8K FFT Iength.

FATAL ERROR: Resulting sum was 1348061092544752, expected: 1348061092543730

Hardware failure detected, consult stress.txt file.

Torture Test ran 14 minutes - 1 errors, 0 warnings.

Execution halted.

 

I took the Corsair RAM out and replaced it with

C.rucial 2x512MB PC3200 CL=3 Part Number: CT6464Z40B

 

I connected all the hard drives and DVD/CD Drives back and ran the same Prime95 Torture Test>Small FFT and it is still running fine for over 2 hours and the system has not reboot.

 

Any ideas?

 

 

My Spec is:

AMD Athlon 64 3500+ (Newcastle) | Akasa Evo33

ABIT AV8 | Corsair TWINX1024-4400C25PT | Tagan TG480-U01

80GB 7200.7 | 120GB 7200.7 | 250GB Spinpoint SP2504C

XFX GeForce 6800 GT AGP Dual DVI

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You will need to manually set the CPU and memory Freguency with these modules. Please load setup defaults and set these settings and test the modules with http://www.memtest.org.

CPU Freq: 200 MHz

Memory Frequency: 100%/1-1/DDR400

Dim Voltage to 2.8 Volts

Resulting Frequency: 200MHz

Memory Timings: Manual/User Define

SDRAM CAS Latency: 2T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 2T

SDRAM Active to Precharge Delay (tRAS): 5T

All other settings should be set to Bios default or Auto.

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At least 2-3 passes should be enough to show if you have a failing module or not. If you get errors in test 5, 7 or 8 that would suggest some other problem, but if you have a failing module you usually will get errors in test 3 or 4.
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23 passes with SDRAM RAS to CAS Delay (tRCD): to 2T = no errors

 

and it seems stable so far. Thanks RAM Guy

 

How come the system was not stable on Auto or SPD?

 

and are these timings tighter? better performance?

 

If I have my CPU:RAM to 1:1 timing with the FSB at 225Mhz / 550Mhz for the RAM should I set it back to SPD?

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  • 1 month later...

I have followed your suggestions and have set the RAM at 2-2-2-5 1T

 

I am currently trying to get the best out of this RAM as it is a PC4400. The highest successful overclocking I have managed to get with these settings is outlined below.

 

If I set the FSB to 202 it becomes unstable at either 2-2-2-5 1T or 2-3-2-5 1T

 

Freq       Multiplier   LDT  Vcore  Mem Timings
2211Mhz		11x201	LDTx4	Def.	 2-2-2-5 1T

 

I have tried different configurations with the RAM timings and to loosen them up to allow a higher clock speed. I have also tried increasing the CPU voltage to try to eliminate whether it was the CPU that was causing the instability.

 

As the RAM was unstable at SPD, could the RAM be the cause of this instability

 

Below is a list of settings that I have tried and they have all proved to be unstable. Your help would be much appreciated RAMGuy

 

Freq       Multiplier   LDT  Vcore  Mem Timings
2255Mhz		11x205	LDTx4	Def.	 2-2-2-5 1T
2310Mhz		11x210	LDTx4	Def.	 2-2-2-5 1T
2255Mhz		11x205	LDTx4	Def.	 2-3-2-5 1T
2255Mhz		11x205	LDTx4	1.525	 2-3-2-5 1T
2255Mhz		11x205	LDTx4	1.525	 2-3-3-5 1T
2255Mhz		11x205	LDTx4	1.525    2-3-3-6 1T
2255Mhz		11x205	LDTx4	1.55	 2.5-3-3-7 1T

 

Regards

deltaworld

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I would suggest testing with another PSU if you can, and I would try and manually set the timings to like Cas 2.5-3-3-7 at 2T and see how high you can get. Also you need to lock the AGP frequency when you over clock.
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As you have mentioned I have tried the Corsair Modules in a different system, but unfortunately the system that I had tried it into is a basic system and the motherboard does not have any overclocking abilities or RAM timings options to change, so left on the default settings I ran Prime95 for 6 hours and it showed stable.

________________________________________________________________________

 

The PCI and AGP are both locked.

 

I have set the timings to 2.5-3-3-7 2T and exchanged the PSU to a QTEC 400W PSU.

 

I have tried a couple of settings

 

202X11 ldtx5 Stable

203X11 ldtx4 Stable

205x11 ldtx4 Unstable

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With the Video Card you have you need to have a minimum of 18 amps just for the Video card. So I would suggest a minimum of 500 Watt with the configuration you gave. Not to mention your system is heavily loaded and you should consider that when you look at the PSU to get. 550-600 would be Ideal for your configuration with 500 Watt minimum.
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I borrowed a Tagan 580Watt PSU from a friend of mine and plugged that in, the results I got were:

 

 

2244Mhz: UnStable

204x11 ldtx4 mem timings: 2.5-3-3-7 2T, vram 2.8V, vcore +0.025V, pci/agp locked.

 

2244Mhz: UnStable

204x11 ldtx4 mem timings: 2.5-3-3-7 2T, vram 2.8V, vcore +0.050V, pci/agp locked.

 

2244Mhz: Stable

204x11 ldtx4 mem timings: 2.5-3-3-7 2T, vram 2.8V, vcore +0.075V, pci/agp locked.

 

2255Mhz: Stable

205x11 ldtx4 mem timings: 2.5-3-3-7 2T, vram 2.8V, vcore +0.075V, pci/agp locked.

 

2266Mhz: Stable

206x11 ldtx4 mem timings: 2.5-3-3-7 2T, vram 2.8V, vcore +0.075V, pci/agp locked.

 

2277Mhz: Stable

207x11 ldtx4 mem timings: 2.5-3-3-7 2T, vram 2.8V, vcore +0.100V, pci/agp locked.

 

2288Mhz: Stable

208x11 ldtx4 mem timings: 2.5-3-3-7 2T, vram 2.8V, vcore +0.100V, pci/agp locked.

 

2299Mhz: UnStable

209x11 ldtx4 mem timings: 2.5-3-3-7 2T, vram 2.8V, vcore +0.100V, pci/agp locked.

 

When I get my 480W PSU, I will try these settings again.

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  • Corsair Employees
Please call our Tech Support at 1-800-205-7657 when you are in front of your system and we can try and help you solve the problem. Our hours are from 8:30 AM to 5:30 PM Pacific Time Monday thru Friday excluding holidays.
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