Multiple BSODs in my "Newly" Upgraded PC

Hi to all of you!
Well I tried to upgrade my Core 2 Duo PC because it was getting unused and also the Old Video Card it had expired so I researched of what compatible components I could adquire and I got a new grapics Card (Geforce GT 610 2Gb) and I added a new 2gb 800mhz RAM to my pc which has a DP35DP motheboard with a Core 2 Duo CPU.
I installed Windows 7 Ultimate x32 to test the new Hardware, at the start it was doing fine, but lately it crashes randomly; most of the time when I:

• Use several applications (Web Browser, any game and Windows Explorer)
• Let it idle for some time
• Play Dota2 or some other Steam game

Most of the time I get:

• IRQL_NOT_LESS_OR_EQUAL
• PFN_LIST_CORRUPT
• MEMORY_MANAGEMENT

I tried windows memcheck and it didn't get any errors, also I tried Driver Verifier and I got 2 drivers conflicting, I thought uninstalling them will try to fix, but not.
I attach all the info the collector has got from my PC.
If there is anything for me to do I would gladly do to help, thank you for your help!

Hiya and welcome to SevenForums!

Code:

BugCheck 4E, {99, ac80f, 2, ac50e}
memory_corruption

Run MemTest86+, It must be MemTest86+. RAM - Test with Memtest86+

Hi! Done it following the instructions, got 8 passes and apparently I got no errors, here is the photo I took! Does it mean it's not the memory? I do not know ty for your help!

Okay 2 things are wrong here. You MUST run MemTest86+.

Second of all using RAM of different models is a very bad idea. You must remove one of the sticks.

Hi again! hehe
Well I retired one of my sticks and everything is working fine!! but I have one question: If I buy the same Kingston memory as shown in the info screen won't I get BSODs in my OS right? If that was the issue it seems :) ty for your help again!!

It will work.

No problem! It's my duty to help!

Hehe, PC has been working fine since then; well I can close the thread because it's solved, and it was my fault for not investigating about RAMs too :/ Thank you very much for your help again!!!!!

No problem! It's my duty to help!