Bsod and instability after increasing memory

Hello all and apologies for a fairly long post, but I am at my wits end here but hopefully you will find my case interesting

I have a Clevo D900C that has been perfectly stable for about two years now.

However in this period it has only been running one gig of ram since whenever I try to upgrade I get strange behavior ranging from Bsod and various other strange behaviours. I have tried this with two different 2 gig sticks, 1 kingston, and 1 pql that was delivered with the machine but then mixed with a 1 gb transcend stick which is the only one that has been stable. Infact in order to get the machine installed properly when I first got it I hade to remove the 2gig stick and run it only with 1gig.

Specs(with 2 gigs):
Intel Q6600
Socket 775 LGA
Chipset P965/G965
Nvidia Quadro FX 1600M
2 gig Pql memory.
Also attached report from cpu-z

All sticks checked with memtest86 and come out as clear, also both slots and combinations of sticks.

The symptoms:
Only Kingston 2g stick: BSOD usually within 10 minutes of booting the computer.
Last causes listed in windebug:

Pool_corruption
ntkrpamp.exe
win32k.sys

Only pql 2g stick:
No bsod but various strange problems with using the computer:
The downloaded imap4 headers in thunderbird gets deleted and need to be downloaded.
Not able to run firefox, after a while it works again.
problems unzipping files, unzipping fails
problems extracting files to install graphics driver, after about 10 tries it succeeds.
Problems installing/updating graphics driver failing when installing the nvidia control application.
Solved by putting the 1 gig stick back and extracting the files to a different directory, I can then install normally. When extracting to the same direcotry as used with the two gig stick the install fails.

After putting the 2 gig pql back in I once again get 7-zip Crc error when extracting the files in the nvidia installer.

I am sure there are tons more problems I have yet to find out about.

So the question then: Does anyone have any tips as to how I can install more memory into this machine and have it work as expected?

Thank you very much for any and all help!

Thor

 

Hello and thank you for your repply!

Yes I am not suprised its a little high as this is a laptop with a desktop processor in it. Anyway there are three fans one sits right on top of the processor, one on top of the memory and one I assume sits on top of another unit which I have not looked inside. The fans are cleaned and seem responsive to changes in load(increase their rpms), the temperature here is quite low(norwegian winter. Can the fan control be adjusted somewhere?
With the one gig I have to say I have used this computer in very varied environments some quite hot and put it through more computing hell than I thought possible with just 1 gig without issues..

I have not made any other changes to the system than increasing the memory and until doing so it has been fairly rock solid with the one gig stick. All drivers are updated all clear in the device manager. I have updated the graphics driver as mentioned.

The memory I am currently using and that was delivered with the machine is:
Manufacturer : PQI CORP.
Part Number : Unspecified
Serial Number : Unspecified
Type : DDR2-SDRAM PC2-6400 (399 MHz) - [DDR2-800]
Format : SO-DIMM (67,6 x 3)
Antivir personal antivirus software, was also installed when just running the 1g stick.

However when running the crucial memory scan (http://www.crucial.com/systemscanner/index.aspx) the recomendation it comes up with is to run ddr2 pc2-5300 memory. Could this have something to do with it?

Should I put the kingston back in and see if it bsod in safe mode as well?

With the pql stick the system stays up, but applications are crashing frequently.
If I have more bsods I will be sure to make a note of what the blue screen says too.

Thank you for your help!
Thor

 

Correction, all drivers are cleared, but have only updated the graphics driver, and installed driver for Rme fireface soundcard, the rest are as was delivered with the computer.

 

Hi again.

Ok so the latest news is as follows.

The kingston now fails the memtest86 so I have taken that out of the race, I might have thought I was testing that one when I infact testing the PQI.

The 1gb transcend ran several passes with no error with memtest86, as did the 2gb PQI stick. However when running memtest86 with both sticks installed and only then there are some errors at around 1413 mb which must mean that the error occurs in the 2gb stick?

Can I then conclude that the 2 gb PQI stick is also broken?
Are there some more tests that I can/should run?

Software issues with the 2 gb PQI:
Open office no longer runs.
Google chrome no longer runs
Firefox crashes.
Downloads are corrupted.
Software installs fail.
However I did edit video for several hours with no problems using Sony Vegas.

Thank you very much for your help so far. I guess sometimes one just has to take time out to find out about these things.

Thor