I just upgraded from 4GB of DDR3 1333 (PC3-10600) to 8GB of DDR3 1600 (PC3-12800) linked below. After install, I set the BIOS to the factory recommend settings of 7-8-7-24 2N and started up. Everything is working fine, however when I run CPUz, it shows the max memory bandwidth at PC3-10600, and the sticks are running at 667mhz. I am using an EVGA 790i Ultra MoBo (Max RAM Speed DDR3 2000) with a Core @ Quad 2.66Ghz, OC to 3.0 GhZ. Is there something else I need to do to get this running to its max potential? I didn't want to just start trying stuff...as we know where that can lead, so I am asking the experts.
Hi newcomer and welcome to the Tom's hardware forum.
Your RAM don't run at full speed beause your mobo don't support that speed by default. If you want that your RAM run at that speed, you need enter to the BIOS and set all the specifications of your RAM manually. The CL, voltage, tRCD, tRP.... If you want learn more about RAM timings, read THIS is for DDR and DDR2, but is the same for DDR3.
Thanks for the tutorial. It was good info. I already changed the factory settings to the RAM recommended settings of 7-8-7-24 2T @ 1.65V. It seems from the previous post I need to change the memory multiplier as well. I didn't see any mention of this in the tutorial. What does this need to be set at in order to achieve max performance w/o stability issues? Is there something else I need to change?
You are right, but the mobo don't support RAM speed by default, so, this could not work. Also the mobo set the timings automatically and not to the recommended by the manufacturer. So, the best way is set the specifications manually in the BIOS.