RAM suddenly went to single channel, only half my ram is being read?

[trueheartlessone]

My computer has 8gb of RAM installed. Everything was working normallly until one day the computer crashed and black screened. The computer wouldnt boot to anything, so i took the battery out to reset the bios, and after a lot of trying, it booted back up. Now when I go on the computer though, it says i only have 4 GB on RAM? I went onto CPU-Z and it tells me that it is recognizing both of my RAM sticks. When i go to slot 3, it shows nothing, so i know its reading my two individual RAM sticks, but the 'channel' is in Single now? Here are the screenshots needed to help me reset this if anyone knows how >.> http://imgur.com/a/IaunB And here is Windows telling me I only have 4 GB http://imgur.com/x1cXrRv

 

[ahnilated]

Run memtest86 on it! Let us know if it errors after 1 hr of running.

 

[trueheartlessone]

Here are my results

 

[trueheartlessone]

http://imgur.com/d0qFmip

 

[trueheartlessone]

Fixed my problem.
Moved my ram sticks to the slow closest to the processor, and also to the correspoding color.
i had them in the one farthest from the processor and the corresponding color.