attach the opposite end you would intend to attach first, then latch the other end over, might take a little bit of force but wont hurt anything, then turn the cam, and it should be ok, seems like the AM3 heatsink retention is a little more taught than the am2/am2+
Thanks, I will try that. Does it make a difference if I rotate it by 180° ?
I think I mixed up what appears to be called the pre-applied thermal interface material and the thermal paste. I do need to put some thermal paste, right ?