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TWIN2X4096-8500C5C Defective?


srjh

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I'm trying to determine whether or not my memory is defective - it has been running fine for about a month since I bought it at 400/800 MHz, but after pushing it to 500/1000 MHz it crashes after a few minutes in Windows.

 

My motherboard is a Gigabyte EP31-DS3L, and it seems to crash with Memtest as well (I can force a crash if I go to "Memory Sizing -> Probe"). In fact it crashes this way even when running at 333/666, but I haven't had an OS crash at 400/800 so far.

 

Both sticks in 1&3 seem to fail, but stick 1 and 3 by themselves work. In 2&4, it fails again. Timings were actually higher than spec (5-7-7-25), and I'm giving it the full 2.1 V.

 

Not sure if it's relevant or not, but although the sticks are recognised by the correct model number, Memtest says it's a 400 MHz stick and CPU-Z says its max bandwidth is PC2-6400 (400 MHz). Should this be happening?

 

Is there more that can be done to isolate the problem, or is it RMA time?

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Not sure if it's relevant or not, but although the sticks are recognised by the correct model number, Memtest says it's a 400 MHz stick and CPU-Z says its max bandwidth is PC2-6400 (400 MHz). Should this be happening?
yes 400Mhz is DDR800 (double data rate)
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  • 2 weeks later...

http://i793.photobucket.com/albums/yy220/stu_images/before.png

http://i793.photobucket.com/albums/yy220/stu_images/before2.png

 

http://i793.photobucket.com/albums/yy220/stu_images/after.png

http://i793.photobucket.com/albums/yy220/stu_images/after2.png

 

Okay, I've attached screenshots for the working state at 400 MHz, and the not-working 500 MHz. In both cases, it says the max bandwidth is 400 MHz, and running it at 500 MHz leaves the system too unstable to use.

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  • Corsair Employee
The max bandwidth has nothing to do with the currently frequency it is just reading the SPD on the module. As for running at 1066MHz you may need to raise the MCH or NB voltage slightly to help the memory controller run at 1066MHz.
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Yes, raised the NB voltage by 0.3 V without success. I'll have a chance to try it in my brother's system later in the week - he's got a very similar system, but with a P45 chipset. Should give me a better idea of what's wrong.
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