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Odd problem


Yellowhammer

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I have an odd problem I need help with.

 

I have three sticks (3 x 2GB) of CMX6GX3M3A1600C9 in a Gigabyte GA-X58A-UD3R, with Core i7 920 processor.

 

When I first boot my machine in the morning, only two sticks (4GB) are found. Upon rebooting the computer, all three sticks (6GB) are found. It seems that one stick isn't working on a cold boot, but once the computer is warmed up it works every on boot.

 

I've tried re-seating the memory, and the problem persists. It only happens on the first boot of the day, which makes this very hard to troubleshoot. Any suggestions?

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No I haven't. I searched the forum before posting, and somehow missed that sticky. Thanks for the help..
LOL...I do it every day. It's that " can't see the forest for the trees" thing.

 

 

This is going to be a pain to troubleshoot, since it only happens once per day.

 

Good luck to you. In the cases where it's not simply a defective part, something on that page helps most people.

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Update:

 

I booted this afternoon, and only 4GB was showing. I played around with QPI, IOH, and DIMM voltages, booting about 8 times with various settings. On the 9th try, I set my memory at 1333 and all 6GB booted. I'll leave it set like that for a while, and see what happens.

 

More later.

 

PS- Question: Given the above circumstances, is there any reason to remove my CPU to check for bent pins?

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Update...

The settings that worked yesterday didn't work today. I put everything back to my original settings and booted 6 times until all my sticks started working.

 

It really seems like the memory stick has to warm up before it works. The problem moves with the stick. I'll try to move them around some this weekend.

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Update. I've pulled the CPU and examined the pins closely for 20 minutes. Everything looks in order. When re-installed the CPU and booted, all 6GB were there. But the next day I only had 4GB.

 

I've found that a quick way to get all sticks working is to change the ram speed multiplier. It doesn't really matter which way I change it. For example, yesterday I reduced it from 1600 to 1066 to get channel A working. Then today I increased it from 1066 to 1600 to get channel A working.

 

This is an odd problem. I'm still playing with voltages, but a little afraid to get aggressive with this. I don't want to fry anything. I'm still learning.

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I'm stuck in a rut. To get all 3 sticks working, I boot once, change the memory multiplier to some random value, and reboot. This has worked consistently. Any suggests as to what would cause this?

 

Voltages don't seem to make a difference. CPU pins seem to be OK. I've loosened the heatsink.

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I have the exact same hardware (but an i7 930 CPU) and the exact same problem.

 

However, I looked up the mobo on the Corsair RAM configurator, and it lists only these kits as compatible:

 

http://www.corsair.com/configurator/product_results.aspx?id=1362102

 

TR3X6G1333C9, TR3X6G1600C8D, TR3X6G1866C9DF.

 

I actually have access to the first kit in the list, so I will swap the kits tonight and post back on what kind of luck I have.

 

Btw, what BIOS version are you running? I'm running F5.

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3/27 9AM - Boot 4GB, change Ram to 1066 (was 1333), reboot with 6GB

3/28 9AM - Boot 4GB, change Ram to 1600 (was 1333), reboot with 6GB

3/29 6PM - Boot 4GB, change Ram to 1333 (was 1600), reboot with 6GB

3/30 5AM - Boot 4GB, change Ram to 1600 (was 1333), reboot with 6GB

 

 

Bad mobo?

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One interesting this that I noticed is that when using Windows 7 64-bit was that even when I booted into Windows after posting with only 4GB, the System Properties read: 6.0 GB (4.0 GB useable). So even Windows knows that 6GB is physically installed.

 

I haven't had the chance to try the other RAM kit yet. Will post back as soon as I have been able to.

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waqqas, can you swap your chips around to see if the problem is isolated to a specific slot or stick? If you go into bios, you can see which channels are working. My problem seems to be mobo channel A.

 

Oddly enough, I couldn't get the problem to repeat yesterday. 6GB was showing every time. I even ran MemTest overnight--not a single error. I know it was material because the last tests I saw were being run on the last 2GB.

 

Despite that, I swapped out the kit with the TR3X6G1333C9. I will shutdown my machine at night and do a cold boot in the morning and report the results.

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3/27 9AM - Boot 4GB, change Ram to 1066 (was 1333), reboot with 6GB

3/28 9AM - Boot 4GB, change Ram to 1600 (was 1333), reboot with 6GB

3/29 6PM - Boot 4GB, change Ram to 1333 (was 1600), reboot with 6GB

3/30 5AM - Boot 4GB, change Ram to 1600 (was 1333), reboot with 6GB

3/30 4PM - Boot 4GB, computer ran idle for 10 minutes, reboot with 6GB

3/30 8PM - Boot 6GB

3/31 5AM - Boot 6GB

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3/27 9AM - Boot 4GB, change Ram to 1066 (was 1333), reboot with 6GB

3/28 9AM - Boot 4GB, change Ram to 1600 (was 1333), reboot with 6GB

3/29 6PM - Boot 4GB, change Ram to 1333 (was 1600), reboot with 6GB

3/30 5AM - Boot 4GB, change Ram to 1600 (was 1333), reboot with 6GB

3/30 4PM - Boot 4GB, computer ran idle for 10 minutes, reboot with 6GB

3/30 8PM - Boot 6GB

3/31 5AM - Boot 6GB

 

Btw, according to Gigabyte's website, BIOS update F5 was for "Enhanced Memory Compatibility." I think that warrants a try on your part :) Those last 2 boots are encouraging, though.

 

If you can live with these symptoms for now, I suggest holding out until Rev 1.1 starts shipping and THEN requesting an RMA.

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3/27 9AM - Boot 4GB, change Ram to 1066 (was 1333), reboot with 6GB

3/28 9AM - Boot 4GB, change Ram to 1600 (was 1333), reboot with 6GB

3/29 6PM - Boot 4GB, change Ram to 1333 (was 1600), reboot with 6GB

3/30 5AM - Boot 4GB, change Ram to 1600 (was 1333), reboot with 6GB

3/30 4PM - Boot 4GB, computer ran idle for 10 minutes, reboot with 6GB

3/30 8PM - Boot 6GB

3/31 5AM - Boot 6GB

3/31 5PM - Boot 4GB, computer ran idle for 1 minute, reboot with 6GB

3/31 7PM - Update bios, Boot 6GB at 1066, change bios settings, reboot with 6GB

4/1 5AM - Channel C failure , change Ram to 1333 (was 1600), reboot with 6GB

4/1 7PM - Channel C failure , change Ram to 1600, change ram timing from auto to 99924T2, reboot with 6GB

4/2 9AM - Channel C failure , change Ram to 1333, increase QPI to 1.315V, reboot with 6GB

4/3 7AM - Channel C failure , change Ram to 1600, reboot with 6GB

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