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RMA Request - VS512MB400 Lot 0451057-0


scyclops

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I received this RAM module and used it successfully for a while even though I ran Memtest on it and it reported one consistent memory error on the stick with every test it ran. A few weeks ago my computer started acting erratically and shutting down randomly during startup and while in windows doing no tasks in particular. I switched out the VS512MB400 stick for an equivalent stick from Crucial from my other computer that I have used for years without problems and the errors stopped happening, they were occuring within minutes using the VS512 stick.

 

I then used the VS512MB400 stick in the computer that I pulled the Crucial stick from and everything appeared to working booting into a new install of Windows XP I had done the previous night. But upon attempting a second reboot Windows would not boot as some required file had been damaged and I had to reinstall Windows.

 

The original computer with the shutdown errors was an Asus A7VT barebones PC with a Sempron 2400+, the other computer used to test which the Crucial RAM was pulled from uses a MSI K72N-LSR with an Athlon XP 2500+.

 

-Andrew

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Can you tell me the bios settings you have set for both CPU and memory and any performance settings that you may have set?

 

All settings were default by the boards. Both motherboards used their Auto-Detect by SPD to set the timings and CAS settings and found and used the memory at 200MHz FSB with 2.5 CAS. The CPU's were at stock settings with no modifications.

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  • Corsair Employees

Please with just our XMS module installed and reset the bios with the Clear CMOS jumper and then enter the bios setup and set the following settings and work your way up from there:

CPU Freq: 166 MHz

Memory Frequency: 100%

Dim Voltage to 2.7 Volts

Resulting Frequency: 166MHz

SDRAM CAS Latency: 2.5T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 7T

Then please test the modules one at a time with http://www.memtest.org.

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Please with just our XMS module installed and reset the bios with the Clear CMOS jumper and then enter the bios setup and set the following settings and work your way up from there:

CPU Freq: 166 MHz

Memory Frequency: 100%

Dim Voltage to 2.7 Volts

Resulting Frequency: 166MHz

SDRAM CAS Latency: 2.5T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 7T

Then please test the modules one at a time with http://www.memtest.org.

 

So you want me to test the 200MHz memory at 166MHz?

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Yes, if you run the memory out of sync with your CPU you may get errors that are not from the memory. And if you really have a failing module it will fail on test 4 no matter what frequency you have it or them set to.
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I did this:

 

Please with just our XMS module installed and reset the bios with the Clear CMOS jumper and then enter the bios setup and set the following settings and work your way up from there:

CPU Freq: 166 MHz

Memory Frequency: 100%

Dim Voltage to 2.7 Volts

Resulting Frequency: 166MHz

SDRAM CAS Latency: 2.5T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 7T

Then please test the modules one at a time with http://www.memtest.org.

 

and the errors started listing within 5 seconds of MemTest starting and continued to list for each test for as long as I watched. Using MSIK72N-LSR with Athlon XP 2500+ at stock settings. The errors are appearing at four offsets, two in the 40MB range, one in the 70MB range and one in the 80MB range.

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