- 4 months ago
Spent more time than I want to admit trying to tune a fairly cheap kit of Ram(F4-3600C18D-16GTZRX - Hynix CJR) on a Zen+ platform.
My standard rules that had worked well enough in the past just weren't making any real head room. I had no issues increasing the speed, but couldn't significantly tighten timings for the life of me(and speed increases above 3600 were essentially pointless).
After a long break from tuning I decided to search for and try out a little software package I had heard good things about, 1usmus's Ryzen DRAM Calculator. With the information from this program and a little tinkering I tweaked not just the primary timings but everything connected with the ram(procODT, RTT, CAD_BUS, etc), and quickly managed to drop my tRC from the XMP setting of 64 to a much more respectable 48 with no stability issues. For those interested in the primary timing changes: 18-22-22-42(XMP) dropped to 16-19-19-32(current)[initially I couldn't even get 16-20-20-36 stable] .
And of course after screwing with settings I had to run every benchmark known to man just to make sure some level of gains were actually being made. Slight to significant gains here and there as I had hoped, but one stood out, userbenchmark. While it generally isn't anyones gold standard of benching, it can bring some component specific insight at times. And in this instance I found myself with the strongest benchmark score on record for this specific memory kit(out of nearly 6K benchmarks), and a score 30% higher than the average score of the top benching Kit(#softBrag).
So if your running a ryzen system, I highly recommend either checking out the program and/or reading some of the articles 1usmus has posted. Truly great resources!