Wierd memory problem

hi everyone,

specs:

c2d e4400
ga p35 ds3r (supports 1066mhz dual channel memory)
2gb ballistix tracer pc2-8500 1066mhz
enermax 500w

i used to use some kingston 2gb pc2-5300 667mhz value ram that could do almost 900mhz and my cpu was at 3.5ghz. but i got tired of the ram limitation so i bought a new kit of 2gb crucial ballistic tracer pc2-8500 1066mhz. i made sure that those were compatible with my mobo before buying and they are. now since i have them all i get is problems. but it is a wierd problem. at first i tried to use them at their default speed wich is 1066mhz but nope they didnt want to because i got planty of errors in memtest86+ i tried voltage settings between 1.8v to 2.4v and stock timings to very loose timings. nothing works at default speed... So i lowered to like 900mhz default timings and default voltage (2.0v) and memtest didnt detect any errors after few hours of testing. I decided to use them like that for a few days to see. well 24h after that, my pc was acting wierdly. so i ran memtest again and got planty of errors after just a few minutes of testing. even if i loosed the timings or added voltage it didnt work at 900mhz. so what i did is lowered it to 800mhz and left memtest work overnight. the next day memtest reported no errors. so i left it like that and you know what? after about 24h on idle the same problem occured. Then what i did is raising back the memory at like 1000mhz and ran memtest overnight. the next day no errors... well you know what? after 24h on idle the same f*ucking problem occured. It is not because of the heat i have a ocz dual memory fan attached to the mem to cool them and anyways they dont even get hot. IMO it is not faulty memory as it would always repport errors no matter what, not run 10hours memtest straight with no reported errors and then after 24h they run bad?

now im currently using my kingston kit and i am testing the ballistix on my gf's pc.

did you guys ever seen a similar problem?

Memtest86+ is not a great program for checking for stability... My (admittedly ancient) memory is fine at 230MHz in memtest86+, but it's unstable under Windows. I think it has to do with the fluctuating load, where under memtest86+ it's full load all the time, never changing, but in Windows it can be idle and then under great load all of a sudden.

I have found this Windows-based utility to actually be better at finding errors than memtest86+, give it a shot

yea i use both memtest+ and memtest windows. but i think memtest+ is still more accurate. and like i said my pc was left alone in windows on idle for 24h and it would crap.

ok but nvm that. i think i have found the problem. i think it is a compatibility issue because they are running fine on my gf's pc. over 3800% coverage on 2 instance of memtest both testing 700mb each, and still running. i doubt they will crap seems to work pretty good.

on my pc i did the same thing but with kingston kit. seems to be ok here too.

so to conclude alll this i think its a compatibility issue with some components i have in my pc. perhaps the motherboard, but it says on the internet that they are compatible with my mobo. so this is a sad end of storry for me but a happy ending for my girlfriend because she benefits some nice memory... even if she doesnt care and she doesnt overclock.