F4-3600C18D-32GTRS (i7 8700k) overclocking help sought

[vulcan78]

Hi everyone, I'd like to OC this memory but don't know what kind of baby steps to take first. Simply googling my memory and the query term "overclocking" has resulted in no hits other than Woomack's OC review of the 16GB variant of this memory (I presume, same timings).
https://www.overclockers.com/forums/...600C18D-16GTRS

Anyhow, it's stable under XMP, timings are a bit higher than I'd like, any recommendations as to where to start to try to OC these bad boys a little?

F4-3600C18D-32GTRS

Trident Z Royal
DDR4-3600MHz CL18-22-22-42 1.35V
32GB (2x16GB)

I love the way they look but I primarily got them after much research and coming to the conclusion that pushing for 4000Mhz+ with my motherboard is extremely difficult as it has single phase DRAM VRM (Gigabyte Z370 Aorus Gaming 7). The web is littered with posts of people complaining about not being able to attain 4000 MHz+ even at 1.45v+ with this particular board. So knowing that, and seeing a few comparison videos showing the gains to be had simply going from 16 to 32GB of memory with the same freq and timings I decided to upgrade from my previous memory: F4-3200C16D-16GTZR (3200MHz CL16-18-18-38 1.35V) based on a 3200 MHz CL16 vs 3600 MHz CL18 video.

I figured there was some performance to be gained here and this would be about as good as it gets without spending a few hundred dollars more upgrading the motherboard to something with better DRAM VRM.

16GB vs 32GB
https://youtu.be/0ql5b39A9DY

3200 MHz CL16 vs 3600 MHz CL18
https://youtu.be/EnRVEgCZJ7c

I just ran Firestrike and although I wasn't expecting a gain in per-se in the Physics test I was surprised to see the CL18 3600 MHz memory run just slightly slower here, although the difference is too close and could be attributed to how variable this benchmark can be (I can run the same benchmark back to back with same temps and have Physics score vary by 50-100 points or more).

https://www.3dmark.com/compare/fs/21916785/fs/21849156

I know that this is not the benchmark to gauge memory performance, it's just that the last time I tried upgrading the former memory (without success, it wasn't stable ultimately) from 3200 to 3466 MHz I did actually pick up a few hundred points in Firestrike Physics test.

I intend to run Cinebinch R15 and Aida64 later.

I can't find anything pertaining to overclocking this memory, I would be extremely grateful for any help with this.

Thanks in advance!


I forgot to add that this memory is on the G.Skill's updated QVL for this motherboard.

[GSKILL TECH]

To overclock DRAM Frequency, it will be necessary to increase DRAM Voltage or timings. Since you want to keep timings low, it is suggested to raise DRAM Voltage to see what can be supported. Make sure to monitor temps so the system can handle it safely.

Let us know how it goes

[emissary42]

From my experience with the some Gigabyte Z370 models hitting DDR4-4000 with 2x16GB might be asking too much, even with full manual settings. I'd probably go with a finetuned 3733/3866 instead, which should give a nice bump in bandwidth and latency over your F4-3200C16D-16GTZR.

How did the Aida64 memory performance look?

If something seems off, please post a screenshot with Aida64 Memory Benchmark and ASRock Timing Configurator ( http://asrock.pc.cdn.bitgravity.com/...or(v4.0.4).zip ).