I have an Asus P6X58d-e motherboard . It has been working for year , bought used . I had major issues with it this week but stripped it ( not the processor / heatsink )) and got it working again ( but only 8gb out of 12gb ) . Now today it went down to 4 and then settled on 2 gb . The problem seems to be with slot A1 , which in all their wisdom the engineers deemed to crucial slot . I have tried all the various different memory configurations with no success . Can anyone shed some wisdom on my dire plight please ?