I've dabbled with overclocking memory before, but I just picked up a new G. Skill kit, and I want to make the most of my IMC. I have a few questions, but first heres the specs:
16gb (2x8gb) G. Skill 2933 Mhz, 12-14-14-35 @ 1.65v
Msi z97 Gaming 5
4790k @ 4.6/4.1ghz
I have the overclock at the same voltages as normal (should be stable), but to be sure am testing ram with the ring bus and core speed at -100mhz just to be sure. Preliminary testing of the ram seems to show that 2933 @ 12 CL is a no boot, no matter how loose the other timings are. 2800 is also unstable at 12 CL. I can boot 2666 @ 11 CL, so I think that's the best option for this kit.
G. Skill sells a 2666 kit that's 11-13-13-35 @ 1.65v, which also has double sided DIMM's (8gb DIMMS).
This seems like a good stating point. It works. Now I want to tighten the timings.
1. When tightening primary timings, does tightening tRCD make it harder to tighten tRP and vice versa? If so which should I prioritize?
2. Is it okay to have tRP be lower than tRCD? I've never seen a kit with timings like that. (I can run 11-13-12, but not 11-12-13)
3. Can memory timings be too loose? For instance is there any reason why I can't run 11-15-15-40 to check if CL 11 at a certain speed is even possible?
4. While it isn't a primary timing, should I prefer T1 command rate and looser timings vs tight timings at T2 command rate, if so to what extent?
These are questions I have been unable to answer by googling and reading guides, and while I could test performance for these myself, I wanted to know if anyone happened to know the answer to any of these questions I have been having. Please feel free to jump into the discussion even if you only have one point to add!