D9GTR and this motherboard don't work well together, my G.Skill D9GTR kit runs 1100MHz 32M stable with reasonable voltage on 790i...can't even get Windows to load on the RE with that kit at 1000MHz 8-7-6. i would suggest you spend less time asking for help here and more time testing the system because you would perhaps be the first to get 1000MHz 8-7-6 with D9GTR to run anything. also, getting them 100% stable at 1000MHz isn't going to be easy on any motherboard. on top of that OCCT failing is usually a sign of something else, it has never been even a reasonable test for memory for me. stick with dual 32M SPi for stability testing then work your way up to Prime Blend once you get that stable.