Rust shuts down my pc after installing a second video card

*First of all here are my specs: *
Processor AMD A6-3670 APU with Radeon™ HD Graphics
Manufacturer AMD
Speed 2.7 GHz
Number of Cores 4
Video Card AMD Radeon R7 200 Series
Manufacturer ATI
Chipset AMD Radeon R7 200 Series
Dedicated Memory 2.1 GB
Total Memory 3.7 GB
Memory 4.1 GB
Operating System Microsoft Windows 7 Ultimate Edition Service Pack 1 (build 7601), 64-bit
Service Pack 1
Size 64 Bit
Edition Ultimate

I recently added a second 4 gig ram card to my pc and now every time that i attempt to open rust my pc shuts down and immediatly starts back up after about 15 minutes of play time. There is no error message my computer just restarts. I dont even get the black screen that tells me my computer didnt shut down properly. Please help! I really want to get back to rust!

Does it only happen when starting Rust or other games too?

EAC publicly said yesterday they are responsible for a bug that shuts down your PC after you quit Rust. I would try to find out more about that.

I have discovered that the stick of ram that i was sent was defective. It does not only crash rust, rust simply crashes faster making me think it would be the only game to crash. Terribly sorry about posting this here.