I have G.SKILL TridentZ Series 32GB (4 x 8GB) memory
rated for 3733MHz with timings of 17-17-17-37 at 1.35V. It's running on an ASRock Taichi Z390 board with an Intel 9700k overclocked to 5.1GHz.
I've been running it for a few weeks and it's stable under Prime95/Blend mode for hours.
In preparation to see if I could OC the memory higher, I thought I'd thoroughly test it out and then establish a few performance benchmarks, then tweak some secondary timings to see if I could improve things. So, as part of testing it, I put memtest86+ on a DVD, booted from that DVD and ran memtest86+ for awhile. In fairly short order, sometimes on the first pass, sometimes not until the third pass, I'd get a few memory errors like this:
Not that it particularly matters, but the errors are nearly always on Test #7.
If I drop the memory speed down to 3333MHz, there are no errors on memtest86+ when run for hours. I tried removing the processor OC so it was running only at the stock speed and the memory still won't run at the rated 3733MHz without memteset86+ errors. The errors are not always the same memory address. Sometimes nothing shows up until the third pass, sometimes it shows up quickly on the first pass. I've tried increasing the DRAM Voltage from the XMP value of 1.35 up to 1.39. No change.
I tried raising the timings from 17-17-17-37 to 18-18-18-38 and it won't POST. At 18-18-18-37 it will POST (which seemed strange to me), but still exhibits similar errors under memtest86+.
So, I'm trying to figure out what next step make sense?
- Return the DRAM immediately and buy something different?
- Contact G.Skill with documentation of the issues to see what they say
- Seek advice on appropriate timing/voltage adjustments that might get rid of the errors
- Upgrade to new BIOS for my Z390 motherboard that just came out today and start a bunch of the testing over with the new BIOS
- Something else you might recommend
FYI, the QVL for these particular memory sticks on G.SKill's site lists this specific motherboard so someone believes they are compatible.
I've read everything I can get my hands on about memory overclocking, but this is my first attempt. I was planning on just starting with the XMP setting and once that proved stable, then fiddle some more after that, but I'm finding that even the XMP setting isn't stable.
Thoughts on what I should do next?
Here are my detailed timings: