my computer occasionally freeze, won't boot

future81

Reputable
Feb 20, 2015
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my computer occasionally freeze, won't boot
I can't specify problem source - and i have no beeps ever when system won't boot even if i removed ram to test it
my system specifications is
Ecs A780GM-A board with Amd 780GM NB chipset built in HD3200 GPU
I also use HD3600 GPU
Ram is DDR2 667 1GB, I've 2 sticks but most of time i remove one of them thinking its the instability reason

Processor is Phenom II X3 710 at 2.6GHZ speed

I need Either permanently fix the problem without changing hardware or determine which part causing the problem so i don't buy new board and ram and then discover the problem still existed

for the external GPU I've tested system without it and got freezes and no boot-up issues sometimes too so it can't be problem source

My doubts were all around MB and Ram Because processor is supporting DDR3 and i'm using only DDR2 Ram but now I'm not sure if it may be the processor or PSU the source of problem

IF its CPU i could use totally different setup in new PC so I cant just buy MB That support that processor to discover its problem source

The PSU is 350W and i can't know if its source problem or not

last 2 days it was stable after manually set HT to 2GHZ not auto and i started thinking i got rid of the problem but it returned today and nothing was useful to make it boot - removing ram clear CMos removing External Gpu then out of sudden it boots again and running which made me doubt alot about PSU or processor

please help me know source of the problem