Ram missing P6T Deluxe - Pt2

Anaksanamune

Anaksanamune

Anaksanamune

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Joined
29 Nov 2009
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16
I made this thread before, and had a few suggestions..but back to the start. I really need help with my RAM and no longer know what to do.

I have a P6TD - Deluxe,
i7 920 @ stock speed,
and 6GB OCZ Platinum 18866 Cl9.

The RAM only shows 4GB after a cold boot (ie the system has been off overnight). If it only sees 4GB I can reboot it, it will see all 6GB.

After several posts from various sites, and large amounts of memory testing software (all showing no problems) I was convinced that the motherboard was to blame. I sent it back (to overclockers) who tested it and found no problems, with no progress I asked around and discovered one of my friends has a triple channel setup. I borrowed his ram and tested it in my system for 4 days (Kingston HyperX T1 2000MHz) there were no problems and it ran perfectly, so I thought that the RAM must have been the fault.
I sent the RAM back to the online store who replaced it - not overclockers. (They said they tested it and found it faulty - however I do not know what tests they do).
I got new RAM from them yesterday - the same stuff (Platinum 1866 CL9) plugged it in and everything worked fine.
Today I turn on my system and I only see 4GB.
I really have no idea what to do next.

Suggestions?
Has anyone else had this problem.
 
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What speed are you trying to run the memory at? it sounds like you've simply got another triple channel kit with a weak stick - they don't seem to be tested very thoroughly from my experience.

The fact that your friends Kingston worked perfectly points to the memory still, or perhaps the OCZ is setting different timings which is causing the issue.
 
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Yesturday when I first put them in they ran fine on 9-9-9-28 @ 1866Mhz - What they are rated for. Today they are just messed up - running the same speed I bsoded twice and one stick did not appear when I first booted.
Now I have dropped down to 1066 and it seems stable, but the dissapearing stick was my whole original problem.
 
You could just run it at 1600mhz and tighten the timings? there's actually no worthwhile advantage to running such fast memory with the i7 being triple channel (it only officially supports 1066Mhz max).

If not can you not do a swap with your friend? or return it for the same type of Kingston memory he has?
 
A friend of mine has a very similar problem. Often he will only have 4GB (as opposed to 6GB) of RAM on boot until he restarts. After a restart the RAM will sometimes re-appear but this is not always the case.

The RAM sticks have all been tried individually & in pretty much every bootable combination. Sometimes all will show but sometimes one of the RAM sticks does not show. CPU-Z ALWAYS detects the ram modules correctly.

Does anyone have any ideas as to what could be ther problem? I'm not sure if it is the RAM itself or simply an incompatability.

Thanks,

Sticklyman
 
Thanks for the link mmj

It really strange now though.
Day1: found 6gb @ 1866 works perfectly.
Day2: completely unstable, only found 4gb, needed drop speed down to 1066 for that to be ok
Day3: found 6gb @ 1066, bumped speed back to 1866, seems fine so far.
 
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