They are very identical

I did but didn't read any of a1 or a2

A1 and A2 these two not working if i install only ram on the them the pc never boot but if i add one more in b1 or b2 directly gives me 4gb as the 1st ram. If the order not the problem and the...

I already know its channel 3 and 4 but then what

Do you have setting for that to try?

I read it but nothing about changing from single to dual

Could you telm what the right order for my ram from A1,A2,B1,B2
This is my ram serial or model
0A04C350
0F040954
0E040D54
0E040461

Nothing changed for all tries soo far

Then what?

I'm on 1333 right now

I formated my windows and installed new one. Also i did flash for new bios and also did f5 to defult. I cleaned with air the slot carefully. Only thing i didn't do yet is the rtc change. I will try...

There is no setting in my bios for that i searched alot even online

My upgrade from my old graphic card to the new one gives me this headache. Please someone help me. I tried every thing my motherboard is cleaned and my ram all 4 working but only 2 slot read and use...