Strange behavior and BSoDs

[Kyol]

Hey guys and gals, I'm looking for some help with the following issue:

I have recently swaped out 4x1gb stick for 2x2gb + 2x1gb of Corsair Domminator DDR2 1067 5-5-5-15, 2.1v, manually set in the bios and never had these problems with 4x1gb, and it is causing random BSoD's with different codes each time like; SERVICE_EXECEPTION or MEMORY_MANAGEMENT and a few others I have seen, firefox will bring crash reports, especially on youtube and games like hearthstone freeze up.

There is no specific way to allocate the sticks on the mobo according to the manual, and memtest86+ for 10 passes on each stick individually perfecty fine.

I have upp'd the CPU-NB Voltage a tad, but 1.45v is a little scary and the RAM is now at 2.13v and it's not crashed yet, time will tell, but before, reseating the RAM would stop BSoD for a few days. Very odd right!

Google doesn't provide much light, so I'm wondering if anyone has had/seen this before?

I guess the 2gb stick might need more juice, but if they're rated at 2.1v, they should work at that right?

 

Look forward to peoples ideas and opinions, many thanks in advance! :3

[MrKickkiller]

The problem is you have mismatched ram sizes and probably timings.

 

You need another pair of 2gb sticks to make it stable again. Every kit of ram modules contains ram modules that are certified to work with each other. that's why everybody uses 2x... gb kits and 4x ... gb kits in their system builds!

[Kyol]

4x2gb doesn't solve this and infact makes it worse, I have tried.

As specificed my timings are all 5-5-5-15.

[Kyol]

No other ideas people?

[Kyol]

Turns out not enough CPU-NB Voltage, didn't think I'd have to increase it for bigger sticks but it has been stable for about a month now.