BSOD - frequent, started just few days ago

Update:

first of all I have 1 stick RAM only: 2GB ddr2 800

my MB is:Newegg.com - ECS A780GM-M3 AM2+/AM3 AMD 780G Micro ATX AMD Motherboard

Its manual says I should be able to switch the RAM stik in either one of the 2 available slots, however it doesn t work like that.

When I unplug the stick from the actal slot and i place it into the otherone, the MB will not even POST.
If I just remove the RAM completely, MB will POST and will report beep codes for missing RAM.

So I did put the stick back and the original slot and the MB will POST normally. Almost normally, because however at the first 2 attempts to POST and get into OS, the MB was stuck at the very first part of the video info on screen, unable to even get into BIOS settings.

After 2 attempts MB started POST correctly and was able to get into BIOS correctly. The issue didn t repeat anymore. After that always loaded Windows correctly. Howevercrashes now seems to be way more frequent.

I already ordered another stick or RAM. My path at the moment is testing a new stick of RAM first (cheap enough) and then if still is having issues I will replace the MB. I start to believe is the MB, however an extra stick of RAM is never a good idea to have :)

I actually do not believe there is any PSU implication in all of this, mostly because as i said, manual says I could set the ram in either one of the 2 slots, but is not happening, leaving me to think the MB controller is at fault.

Sounds like either the Motherboard, CPU, or RAM. Your troubleshooting steps are sound, so see if the new RAM resolves it. If not, make sure all your power connections are set up correctly to the motherboard including the fans. I had a NB fan and CPU fan power junction swapped once and it caused some very strange behavior and my system would not get past POST.