Ram slot not working(help)

[nick2012]

hey guys i am having 880gm usb3l
today i removed my silver aroow reapplied TIM and not even touched my rams 4gb*2 gskill ripjaws
and when i started my comp it started beeping
tried switching 3 different rams

 

[nick2012]

bump

 

[suteck]

What is the beep code you are getting? Did you remember to plug one of the fans into the cpu fan header? Pull all the ram and see if you get the same beeps? When you removed the heatsink you might have dislodged the cpu in it's socket, you might want to remove and reinstall the cpu.