Dual channel not working anymore.

Naomi Karol Anne Dy

Distinguished
Jul 19, 2014
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So, I got this system 6 years ago. By the time that I got it, its already on dual channel mode. Anything is working fine until a month ago my CPU cooler stopped working probably due to its age that the CPU fan connector is faulty. So I got a beefy CPU cooler that supports LGA 775 and a GTX 560 Ti along with it. So, I have to take everything out just to install the cooler. I installed the cooler, put the mobo into the case and installed the GPU. Now, I opened up the PC and it wasn't even posting at all. Also I doubt it was the CPU pin being bent because all I did is clean the thermal paste and put a new one and put the new cooler on. I didn't overtightened the screws as well while I'm installing the cooler. Now, I tried putting 1 ram stick at each slots and the slots B1 and B2 are working but A1 and A2 aren't. So I just went for single channel mode because I don't have the time to figure it out.

The rig :
CPU : Intel Core 2 Quad Q8200 @ 2.33 GHz
RAM : 2x Gskill 4GB DDR2 kit F2-6400CL5D-4GBPQ
MOBO : Asus P5K-E/WIFI-AP
COOLER : (I don't remember the model but its from DEEPCOOL)
GPU : GTX 560 Ti