Hello, first post on the board and I'm already asking for help..
Let me preface this with the facts that I do know how to build a PC, and that I know requirements on cooling, power supply, etc. I'm still stumped right now.
I have been building a machine for the last couple of months. Mini-ITX format, AMD based:
MSI A88XI-AC (which is an RMAd board)
AMD A10-7850K (now cooled by a Corsair H105)
AMD Radeon R9 16GB 2400 MHz (running at AMP 2400)
Samsung Pro 128GB SSD
WD 1TB Black Series HDD
Silverstone ST45SF-G 450W PSU
Running Win 8.1 Pro
All installed in an NCase M1, with a CyberPower UPS providing clean power.
I previously had these components installed in a Silverstone ML07 case, and air-cooled the CPU with an undersized Noctua, a Zalman, then moved the whole system to the NCase and tried a Cooler Master Seidon 120M. Before the Corsair unit, the CPU would regularly heat close to 50C in the BIOS(!). But considering the immense cooling power the H105 provides, and the fact that I know I installed it correctly (good contact with CPU, no bends in tubes, pulling air in through the radiator), it's simply not possible for the CPU to overheat, especially because I don't hear the fans kicking up significantly due to increased heat. I manually pushed the fans to 100% capacity, and I noticed a huge bump in db, so that ain't it.
Now, the problem that I am having is that the machine will just quit in the middle of operation. I tried two games (Witcher 2, The Heist) and it just stops 5-10 minutes after starting the application (no BSOD though). It did work fine with Valley Benchmark running for over 5 minutes. Prime95 has produced some critical mistakes, though I have not tried it with the Corsair installed. The reason I have not is this: I tried to download the newest Catalyst Suite, and the second the download completed it just went dark, and I got this feedback: "The file is possibly corrupt. The file header checksum does not match the computed checksum."
Considering the limited amount of components that are part of this machine, the solution should be simple, but I'm not sure which the most reasonable. I'm leaning toward getting an Asrock FM2+ Mini-ITX and see if that produces different results (the MSI has been surprisingly frustrating), or having the RAM (which comes with lifetime warranty) RMAd.
Thoughts? Any feedback would be appreciated!