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ASUS P5N32E-SLI 680i and 2 x TWIN2X2048-6400C4DHX


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When I fire up my pc with 4GB, every first attempt ends in a bluescreen while loading windows or it hangs while booting.

Then it starts up again and it asks how to start Vista. Sometimes when I say to start teh normal way it goes just into the desktop and BSOD's then.

When I put in 2GB I don't have any problem in either of the memory slots.

What could cause this trouble and how can I fix it?


Two weeks ago I changed the motherboard and installed the new one I received (exact the same).

The problem still exists and there is no reason for I can see. I tested every memorybar in the different slots and then there is no problem so I really don't have a clue.


The memory is not overclocked, the CPU is overclocked to 3 GHz and memory and FSB are set to manual (so it's turning at 800 Mhz)

The juice for the memory is put to 2.000 and the OS is VISTA Ultimate 64Bit.

The motherboard has the 1103 Bios

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I have installed the patch for VISTA 64 so I think it's the right one.

I'm testing the memory now (2GB at once) with memtest86+.

When I tested it with the 4GB errors occured after 30minutes so now I'm testing them separately in all the memorybanks.

I had 2 faults in test 5 after 9Hr running it with the first 2GB in DIMM 1 and 3.

Now I'm testing them in DIMM 2 and 4.

After I'm home I continue testing with the other 2GB.

I have checked memtest when I came home and I had lots of faults in test 5 on the other two memorybanks.

Does this means that my processor is broken or ....?


I will keep you posted.

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I have changed it back to stock speed. It turned for a moment on 4GB. With a new restart it didn't even load windows. It freezed in the posting.






Now I'm back turning on 2GB

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  • Corsair Employees

For testing do not overclock the CPU. Make sure you have the latest Bios revision and try the following settings:


Sli ready: Disabled(This setting has nothing to do with your graphics configuration)


Memory Voltage: 2.0v

1.2V HT: 1.25v

NB Core Voltage: 1.4v

SB Core Voltage: 1.55v

CPU VTT Voltage: 1.25v


TCL: 4


TRP: 4

TRAS: 12

Command Per Clock: 2

TRC: 24

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I have done like you said and it works fine withe 3GB Ram.

(There is an new BIOS but it's still beta so I didn't use it)

If I put in the 4th one it starts booting and gets in a loop of constant rebooting. It never goes out of the posting.

With 3GB I turned a whole night (+- 9Hr) memtest86+ and I had no errors.

I will test once again the other memorybar to ensure I don't have a bad part.


I seems to me that it's always with the same bar that the problems occure.

After testing it has become clear that there's a memorybar broken down.

If I put that one in my computer it doesn't want to start up, so I think that the problem is located.

I will change the bar in the store where I bought them.


Thx a lot.


I will keep you posted.

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  • Corsair Employees
Please test the modules one at a time with http://www.memtest.org at the tested settings and if you do find its failing then I would get that set with the failing module in it replaced, please use the RMA request found in TSXpress or follow the link in my signature “I think I have a bad part!” and we will be happy to replace them or it!
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