I recently bought 2 4GB sticks of RAM that someone recommended on here, the brand is G.SKILL and I got them from newegg. The thing is, since installing them I have had 2 kernel panics (gray screen of death) that I wasn't having with my 4GB before. The thing is, I have run Apple Hardware Test and with 8GB I get this error: 4MEM/62/40000000 0x84de1318 So I take out both sticks and stick them in the reverse slots, and I get: 4MEM/65/40000000 0x84e0d318 So I am thinking it must be one of the sticks of ram. So I take them both out and put 1 in the bottom slot, no issues. Stick the other one in, again no issues. So I put one into the top slot to see if maybe a slot has a problem and I once again have no issues when running the extended tests. So, I decide that maybe I just need to retry putting the ram in again and I get this error, slightly different this time. 4MEM/66/40000000 0x84e11318 I really don't know what is going on here, nothing is plugged into the computer, and the RAM modules seem to be fine on their own. I guess for now I am going to stick the Apple RAM back in and see if it throws a similar error. Has anyone else had any issues like this or any advice?