Help with PC memory error.

[theHAYwired1]

So I installed a new cpu cooler today and now my pc is not booting and the motherboard
diagnostics LED's are saying memory error. I have tried 3 different RAM sticks in all the RAM slots
but no luck.

System Specs:
i7 870
Biostar T5XE
4gb Kingston Ram
128gb SSD
1.5Tb + 500Gb HDD
Club 3D HD6870

I tried two other 2Gb RAM modules on their own as well but no luck.

My pc would also never be able to use both 2Gb module or a combination of the 4gb and 2gb modules, it would recognize both but would say whatever was in the A1 RAM slot would be useable.

Edit: Rebuilt the pc and now everything works fine but it still only able to use one memory module.

 

[Pada]

Could you tell us what kind of RAM configurations you've tried?
eg. 4GB DDR3 1333MHz CL9 1.5V in Slot A1 + 2GB DDR3 1333MHz CL9 1.5V in Slot B1

Make sure that you don't have a grounding issue where the heatsink is touching the case at the back.

 

[theHAYwired1]

I have tried:
Kingston ValueRAM 4Gb DDR3 1333MHz CL9 1.5V in A1 + Kingston ValueRAM 2GB DDR3 1333MHz CL9 1.5V in B1
Kingston ValueRAM 4Gb DDR3 1333MHz CL9 1.5V in A1 + Kingmax 2GB DDR3 1333MHz CL9 1.5V in B1
Kingston ValueRAM 2GB DDR3 1333MHz CL9 1.5V in A1 + Kingmax 2GB DDR3 1333MHz CL9 1.5V in B1

I have also tried them in A2 and B2 but then i cant boot.