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Thread: NEW!!! DRAM Calculator for Ryzen™ 1.5.1 (overclocking DRAM on AM4) + MEMbench 0.7 (DRAM bench) Reply to Thread
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  Topic Review (Newest First)
07-22-2019 12:58 PM
chakku
Quote: Originally Posted by 1usmus View Post

I checked the VDDG voltage requirements for the entire frequency spectrum when using a processor with a poor memory controller. 0.9 volts is enough for any scenario.
Good find there, dropped my VDDG to 0.9V and SOC to 1.05V with 1866 on the fabric and still just as stable as before. Also manually set ProcODT to 36.9 ohm over the 60 Auto value which did not change stability at all but may as well keep it like this.
07-22-2019 12:41 PM
HatchetEgg
Quote: Originally Posted by thegr8anand View Post
Anyone with 3200C14 b-die ram got good overclocks with 3900x?

I have 3200MhzCL14 B-die RAM but not a 3900x,


But I can assure you even I am able to get up to 3733MhzCL16 OC, however, it does not perform better than my 3600MhzCL14 OC.
07-22-2019 10:30 AM
thegr8anand Anyone with 3200C14 b-die ram got good overclocks with 3900x?
07-22-2019 02:39 AM
Athyra Also really looking forward to trying out the tool on my 3900x & x570!

The Gygabyte boards seem to have this hideous bug where if the fabric is running at 1800mhz there is a very high idle watts, like 50w, and below is 25w:
https://www.reddit.com/r/Amd/comment...or_at_3600mhz/
What's worse is this seems to also affect performance, if I run fabric+memory at 3733 my cinebench scores actually drop a few hundred points =/

So I'm downclocking my 3600 mem to 3533 (fabric 1766) but i have no clue what timings are best for that, would love to tighten them up with the calc!

Thanks for your hard work! It's really appreciated!
07-21-2019 02:38 PM
SaccoSVD I'm ready to try a new DRAM calc with my 3900X

So far my 64Gb Hynix A die that was working at 3200Mhz with my 1800X won't work with the new CPU in the same board. I'm sure is just a couple details but is hard to tell which one. Also we need to wait a bit for the BIOSes to mature some more.
07-21-2019 12:09 PM
dgoc18 Guys,

I never seen IF clock show up on HWinfo64 before, Look like I set IF correctly it's show up on screen.

See Ryzen Master and HWinfo64 match it.

This ram C-die CJR at 16 19 19 19 36, I can't use currently dram calc 1.5.1 do not work for over 3600.

I borrow main timings from the link at

https://pcpartpicker.com/products/me...t=price&page=1
07-21-2019 10:53 AM
Nighthog
Quote: Originally Posted by larrydavid View Post
You running 4x8GB? What was the key to getting GDM disabled and stable?
Yes 4x8Gb.

I think it was the combination of procODT & setting the CAD Bus Drive Strength correct. Mostly thanks to the CAD Bus Drive Strength.
I needed to have 60Ohm for ClkDrvStrength to stabilize the setting to not return errors. Geardownmode enable only need it [auto/24Ohm]

This is usually motherboard/memory specific so your mileage varies.
07-21-2019 10:39 AM
larrydavid
Quote: Originally Posted by Nighthog View Post
I'll bite with a interim result of stability & AIDA64 as I test various settings here and there. It was a little more trouble getting GeardownMode: "Disabled" working than I thought.
I haven't really begun lowering timings yet as I was nailing away the stability issue for GDM disabled.

I can agree on I found no use in increasing SoC voltage or the derived VDDG from it. Was causing more issues than helping.
You running 4x8GB? What was the key to getting GDM disabled and stable?
07-21-2019 05:53 AM
nolive721 for some reason the 3066Mhz with tight timing didn't show up in my post, trying again
07-21-2019 05:51 AM
nolive721 just starting to play with RAM Ocing so found the software here quite helpful

But it seems I am hitting the wall with the sub timings tweaking I am doing to try to improve the RAM performance being speed or latency

is there something I am doing wrong or is it jst what my CORSAIR C16 3200Mhs kit is capable of? Its Hynix MFR so I know not really the best out there but I was hoping to see some benefit beyond 3066Mhz which doesnt seem materializing
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