Memory oddituy

[warnockdavid_92]

When I put any 3 of my 4 memory chips into the first 3 slots on my motherboard the system seems to work correctly. If I add a 4th chip into the 4th slot the system won't boot.

I have 2 CM2X2048-8500C5D 2.1v v1.1. There are two sets of two. After getting these indications. I tested them using memtst86+ 4.20. Each chip was tested in each slot, 12 passes in each of the four slots. No errors were detected.

The only thing non standard is my bios is configured 5-5-5-18 instead of the 5-5-5-15 it says on the chip. This is due to a motherboard limitation.

Any ideas?

 

[skaz]

Hm that does seem odd. Have you tried updating your BIOS?

 

[Hawkeye22]

You didn't list your specs, but I had a similar issue with a gigabyte board and a bios update fixed it.

 

[JDFan]

IIRC some MOBOs have problems running with all four slots filled due to power droop --- might try increasing the voltage just a small amount and see if that helps (could be with the four slots filled there is a bit of voltage loss causing the system to not be stable and sometimes a small increase to the voltage will make it stable.)

 

[warnockdavid_92]

My system specs are in my profile and I'm physically located in Eatonton, GA.
From : David Warnock [ warnockdavid@att.net ]
Sent : 12/23/2011 05:22
Question : When I put any 3 of my 4 memory chips into the first 3 slots on my motherboard the system seems to work correctly. If I add a 4th chip into the 4th slot the system won't boot.

I have 2 CM2X2048-8500C5D 2.1v v1.1. There are two sets of two identical chips. After getting these indications. I tested them using memtst86+ 4.20. Each chip was tested in each slot, 12 passes in each of the four slots. No errors were detected.

The only thing non standard is my bios is configured 5-5-5-18 instead of the 5-5-5-15 it says on the chip. I don't know why, I have it set to auto configure. Could this be part of the problem? Should I manually configure to 5-5-5-15? Is the 2.1v on the chip the voltage it should be set at?

Any ideas?

 

[warnockdavid_92]

Best answer selected by warnockdavid_92.

 

[nikorr]

This topic has been closed by Nikorr.