I built my rig last July, EVGA 790i Ultra (132-CK-NF79-A1), Intel Q9450 1333 2.66, GTX 285 SSC edition, OCZ Tech 1010w (S/N: S7231050948), Windows Vista Ultimate 64bit SP2, and I've attempted to used 2 different types of ram with this build. When I origionally built it, I was still using 2x BFG 7600 GTs, so I didnt really do any OCing seeing as how I didnt have the GPUs to make it worth it. The first set is mushkin 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model 996601 which I didnt bother trying to set to 1600 untill I got a new Graphics card. When I bought my GTX 285, I decided to try and set my memory to 1600 about 2 months later, but couldnt get them to run stable. My comp would constantly restart mid boot at 1600, or lock up once it finished loading vista at 1333. After abit more research I found out that none of Mushkin's ram was supported by any of the 790 series boards. So I then ordered 4 sticks of OCZ NVIDIA SLI-Ready Edition 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1800 (PC3 14400) Dual Channel Kit Desktop Memory Model OCZ3N1800SR4GK. Same deal with this ram, 4 sticks clocked at 1333 or 1600 my comp would lock up as soon as I would log into my user. I tried many different voltage settings, adjusting the timings, setting everything to auto, I tried using just 2 sticks and always the same results. All of this testing was done with both OCZ and EVGA tech support. EVGA finally said that it was possible my motherboard had a bad memory controller so they allowed me to send it back and they sent me a new one. I get the new board, and I still have the same issues with both the Mushkin and the OCZ sticks, EVGA later said that they did a number of test on my motherboard I sent back to them and the board turned up flawless. They said they were able to OC 2 different processors and 6 different types of ram with no problems. They told me that its possible that I am just unlucky with the ram I had or that it was possible that I should talk to Intel about a possible processor problem. After returning the OCZ sticks for a refund, I ordered 8g of Patriot Viper 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model PVS34G1600LLKN, which came highly recommended by reviewers and EVGA.
All of the ram I have used has been tested and no problems turned up. If I end up having the exact same issue with these Vipers, does anyone know if its possible that this could all be caused by a problem that my processor might have? Any available help would be much appreciated, thank you.