BSOD playing any game, dxgmms1.sys - RAM problem?

Hi, I have been receiving these BSOD's for a long time and this is mostly when I playing a game, it sometimes takes an hour or 2, sometimes a few mins into a game. dxgmms1.sys is the main one that I'm receiving, I am also getting different ones but this is the most occurring.

I had a temporary solution to it which was overclocking the CPU. I overclocked it by using the CPU level up feature in my mobo BIOS, I was choosing the i965. However when I did this I realized my RAM capacity went down to 4GB from 6GB, so I was losing one whole stick of RAM.

My first thought was faulty RAM so a few days ago I ran a Memtest and got a few errors after 8 passes, these were mainly errors in test 5 and 8. After doing a little research I found out that sometimes its not always the RAM which is faulty when these errors occur so I decided to update most of the outdated drivers including the NIC. I had also updated the graphics card drivers as well as reinstalling them. I had also run prime95 and after about 2 mins an error came up and stopped one of the workers. I have also looked at the temps while doing this and they seem fine.

I have attached the most recent BSOD after playing BF3 multipayer for an hour. So is the problem just in the RAM or is there a defective driver or maybe there's a fault with other hardware?

SPECS
Motherboard: Asus Rampage II Extreme
CPU: Intel i7 920
RAM: 6GB OCZ Gold Triple Channel
GPU: Radeon HD 5770 1GB

(CPU was overclocked for a short while about a year ago but due to high temps I had to bring it down to default settings, and all the settings are default at this moment)

Thank you for the reply Arc, I have attached the new .zip

1. The antivirus I use is the free version of Avast.
2. I got the graphics card about 2 years ago, this was when I build my PC.
3. Yes it only occurs while playing games, but not always and sometimes takes a few hours.
4. Same as the graphics card, about 2 years ago.
5. I did update a few, but I will try to find out any others that I haven't updated.

I will let you know how it goes once I reinstall the graphics driver and update other drivers. Thanks again

Sorry for the late reply, I have reinstalled my graphics driver using your method and also ran Furmark for a few hours and I didn't get any errors or blue screens. I have also updated my network driver. I have also played Battlefield 3 for a few hours today and have had no crashes so far, but I did do a prime95 blend test and an error occurred after about 7 mins.

I'm not sure if the driver update has fixed the crashes because prime95 came up with an error but had no crashes when playing BF3 and running Furmark. :S

I have attached the MSINFO32 file also the results file of the prime95 test, I also ran "sfc /scannow" and have attached the results of that too.

I just received another BSOD, this time it was 0x7E and atikmdag.sys, also this happened when I was NOT playing a game.

I have attached the mini dump.

Hi, I have attached the MSINFO32 file again and my event logs. I think I did install Catalyst control center, it was included with the driver itself.

Ok I disabled avast and ran the tool, I have attached the files. I hope it works this time. :)