06-04-2018 08:46 PM
07-17-2019 08:31 AM
Alcolawl wrote:
I've successfully overclocked my 3466CL16 kit to 3600 CL16 on the latest BIOS. Pretty tight timings too. Several other users have been able to reach 3733 MHz as well according a community overclocking sheet.
Yeah, this BIOS has been a pain in the ass. I've had instances where previously perfectly stable settings would suddenly just not boot. Here's what I've had to do to get memory settings to stick:
- Load Optimized Defaults
- Save and Reset
- Set Memory to 2933 MHz
- Set Memory Voltage to your desired voltage.
- Save and Reset
- Boot Back into the BIOS
- Set desired memory speed
- Save and reset
I was able to get my memory to stick at 3600 MHz @ 1.44V this way.
07-17-2019 09:49 AM
07-17-2019 11:48 AM
07-17-2019 12:45 PM
07-18-2019 07:42 PM
Alcolawl wrote:
I've successfully overclocked my 3466CL16 kit to 3600 CL16 on the latest BIOS. Pretty tight timings too. Several other users have been able to reach 3733 MHz as well according a community overclocking sheet.
Yeah, this BIOS has been a pain in the ass. I've had instances where previously perfectly stable settings would suddenly just not boot. Here's what I've had to do to get memory settings to stick:
- Load Optimized Defaults
- Save and Reset
- Set Memory to 2933 MHz
- Set Memory Voltage to your desired voltage.
- Save and Reset
- Boot Back into the BIOS
- Set desired memory speed
- Save and reset
I was able to get my memory to stick at 3600 MHz @ 1.44V this way.
07-18-2019 08:20 PM
Rbryan04 wrote:
actually been quite lucky with bios 5007 in terms of ram compatibility
recently upgraded from 2700x to 3900x and havent had issue so far
im using 4 ram sticks hynix cjr, from 2 kits of trident z rgb 3600 cl 18
booted with DOCP no problem tho i ddnt test stability i did play bfv with it no prob
used ryzen calculator 3200 16-18-19 (safe preset) @ 1.35v n stable aida 1hr/prime/bfv/divsion 2 /premiere
decided to try 3466 cas 16 (safe preset) but stepped 1.35->1.36v(noticed on older bios that high mhz docp need and extra 0.05v to be stable) soc @ 1.05v setting is stable on my test ,games and premiere
bugs i saw with bios is PBO not working as manual where tdc 114->95 and edc 168-140 (lower power limit) which dropped some cpu perf on new bioses (this number might be for ryzen 3000, but im sure these numbers where changed when i was still on 2700x. pretty sure there are post about lowered multicore perf somwhere. it did break aura sink after ram tweak had to install old version
anyway only way to change this is to use performance enhancer level 1 or 2
level 1 removes limit on ppt and tdc which also increases temp by ~10 deg c (high 70 to low 80)
level 2 removes all limit and adds another 10deg on temp (90+ deg) yep ive hit 93 deg dont even wanna know vrm temp
at stock with nhu12a temp are around 30-40+ deg idle 70-73 on games, 75 on prime small fft
temps are same as 2700x with higher pbo setting
07-19-2019 01:49 AM
07-19-2019 06:22 AM
JobCampbell wrote:
Hi! Also owner of this board and a 3900X, plus 4x 8GB Corsair Vengeance DDR4 3200 CL14.
Just to confirm what I've read from some other people, RAM don't boot with DOCP, but I can manually set its XMP values and it'll boot just fine. I even pushed them to 3600MHz 16-18-18-36 1T (still 1.35V) no problem whatsoever, stable after 6h of Prime95. As for the CPU, after some testing I found out that setting a vcore negative offset is the best I can do to it. Sustained clocks will be higher after 6h of Prime with -0.125V (best balance I've found).
Now I have everything at default except RAM at 3600MHz CL16 and negative vcore offset of -0.125V.
For actual work, like x264 encoding (what I want this machine for primarily), all cores stay at around 4275Mhz on their own as an average, during 4-5h encoding queues on an average load of 70-80%, with vcore ranging 1.25 - 1.275V and temps never going above 57ºC (Corsair H115i Platinum).
I don't know about synthetic benchmarks, I know that for my actual work, this is rock solid and gives amazing performance at stock. These Ryzen chips don't have that much overclock room (if any), because they do it by default. Undervolting to lower temps, even more, is what worked best for me, as stated above.
By the way, in my actual workload this thing is like a 450% faster than my previous 1700 @ 4GHz. Also I borrowed a 9900K some time ago, and this 3900X is still like 60% faster (again, on my workload, which is what I care about in this machine tbh).
Cheers!
07-22-2019 03:42 AM
schmak wrote:
Just an FYI they have found that undervolting Zen2 may give you lower temps and higher sustained clocks, but lower performance. You can check yourself by running a cinebench with stock voltage and then with your negative offset, you should get a lower score. It has to do with how it manages the voltage. It's fine if what your main problem is temp and not performance, but keeping it at the higher voltage won't hurt the chip, it takes care of itself well.
https://ns.reddit.com/r/Amd/comments/cbls9g/the_final_word_on_idle_voltages_for_3rd_gen_ryzen/
https://ns.reddit.com/r/Amd/comments/cdkbkk/psa_undervolting_does_not_retain_performance_with/
For Zen and Zen + undervolting is fine.
07-23-2019 04:10 AM