P55-GD85 - not all ram available at boot / need to reboot. [Solved]

C

Coyote

New member
CORPORAL
Joined
Jun 11, 2010
Messages
11
I've 4 sticks Corsair XMS3 - 2 GB @ 1600 Mhz installed on my P55-GD85 board with the XMP mode enabled.

When I boot the PC, only 2 sticks are recognized (4087MB) at the end of the process (even if the boot sequence is notifying 8173MB ram) and I need to restart the PC to obtain the 8173MB really available. Seems that during 1rst boot, not enough power is provided to awake the 4 sticks (and I've a good Seasonic 80+ 750W PSU...) and when restarting the PC a few seconds later, all memory is always available.

I tried reseating them, it not changed anything....
I've run the Windows 7 memory verificator, no problem...
I 've run MEMTEST when the all ram was available, no problem...

What do you advise? Increasing the memory voltage slightly? Disblabling "quick boot" option? Something else?

Thanks in advance for your help and advises.

 
Sort by date Sort by votes
Reseating CPU and heatsink for a ram problem
Click to expand...

Yes.  The memory controller is inside the processor.  Inadequate contact between CPU Socket pins and the processor's contact pads can cause memory problems.  It is a very common issue. 

That's annoying...
Click to expand...

Well, then you will have to do it annoyed.
 
Upvote 0 Downvote
In the case of some sticks never recognized...OK...I can understant that some bended pins/false contact maybe the problem at CPU level...but here, ram is recognized at each reboot...so, it does not seems a constant default as the ones generated by bad CPU placement/contacts, or am i wrong? :nooo:
 
Upvote 0 Downvote
so, it does not seems a constant default as the ones generated by bad CPU placement/contacts, or am i wrong?
Click to expand...

Let me put it this way:  Do you want to make double-sure about this now and simply do it or do you want to skip this step without testing (and perhaps find out after hours of troubleshooting that in the end there was a contact problem after all)?  Give it a shot and see what happens.  Then we can consider other things from there.
 
Upvote 0 Downvote
I reseated CPU and Corsair H50 watercooling + cleared CMOS....nothing changed.

Still unable to have all RAM available at 1rst boot. I've to restart systematically.

If the PC is "cold" (in the morning), I need sometimes to restart twice or more to have all the RAM available. On the oppposite, if the PC is "warm" (has been used for a while) I've more chances to have all the memory available at 1rst boot. But generally, I need to boot and restart once (after a few seconds) to have it all available. Curious...

Now I will try to intervert the sticks and to connect my PC directly to the sector without passing through the Back-UPS device...

 
Upvote 0 Downvote
Tried reseating all my memory sticks, one after the other, in the right DIMMs (beginning with the nr 1) and rebooting each time in between...RAM was increansingly recognised...but once the PC was stopped...same thing when booting it after a while...only 4087MB available and need to reboot to have the 8183MB available.

Tried to reconnect the power pins to the MB...same, not better.

Tried to plug the PC directly to the sector without passing through the BackUPS device...not better.

Seems related to temperature of system/components...when booting in the morning, I need several reboots to have the memory fully available. If the system has been working a lil, one reboot is enough. When the system has been working for long, memory is fully available at each boot  :think:

Will now try to reseat the sticks in another order...another idea Doctor ?
 
Upvote 0 Downvote
OK...I reseated my 4 sticks following several order combinations. Some combos did not allowed to recognize more that 2GB at boot...some other 4GB. Finally I found a combo doing all my memory immediately available at boot. For the last 2 days, each time I boot (with the PC being cold, tempered or hot...), I've now directly the 8GB memory available :biggthumbsup:

I will check if this is stable in the next days/weeks and keep you informed.

Who can explain the reasons of such RAM sticks/DIMMS behaviour? :think:.
 
Upvote 0 Downvote
Jack, do you know how to tag now my post as "RESOLVED"?

Since I changed the order of my 4 sticks, it seems that I've found the right sequence and I have now all my RAM available at each boot... :agrees:

Still do not understand WHY are the RAM sticks acting like that, but OK, as long as it works...

THANKS again for your help and patient involvement in helping noobs as me to fight against the machines :worship:

Coyote
 
Upvote 0 Downvote
OK Mike, you can change the title of the thread...the problem has definitively been solved by changing the order of the RAM sticks.
Ram is fully available now, since more than 2 weeks, without any failing boot or reboot.

Thanks you for the assistance/guidance.
 
Upvote 0 Downvote
Back
Top