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post #12001 of 12039 (permalink) Old 07-28-2020, 04:04 AM
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Do you think we have any chances that modders will unlock PCIe 4.0 lines from CPU on C7H in future?

AMD Ryzen 9 3900X @ CCX OC | Crosshair VII Hero, bios: 3103 | 2x16GB Crucial Ballistix Sport LT 3200CL16 Micron E-die @ 3733MHz 16-19-16-16-32-56 trfc 545 | RX 5700 XT @ 2038MHz on 1056mV with 15Gbps gddr6 | Samsung 970 Pro | Noctua D15 | XPG Core Reactor 750W
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post #12002 of 12039 (permalink) Old 07-28-2020, 04:38 AM
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Quote: Originally Posted by Pietro View Post
Do you think we have any chances that modders will unlock PCIe 4.0 lines from CPU on C7H in future?
ASUS has already unlocked it on at least one B450 board and I'm sure I've read of others doing this on their B450 Pro or whatever they called the boards which filled the gap until B550 came along.

Board designers knew PCIE 4.0 was coming on Zen 2, that would go in this (and other) boards. Some have kept back to the bios that last had it as it works fine.

Current Bios - 3103

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post #12003 of 12039 (permalink) Old 07-28-2020, 09:49 AM
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I've been experimenting with settings based on my profile on the previous page....

I've been playing with Boost settings and found they don't have much effect on my overall performance. Scalar and the 0-200MHz settings made barely any perceptible difference on single or multi thread loads.

I used RM to see boost speed. EDC is at 20 (though I think 21 might be my sweet spot). With or without PE3 RM reported the cores boosting up to 4.5GHz, though I could see sometimes the cpu would switch threads with speed staying at 4.5. Seem to get better SC results when the task stays mostly on one core, rather than switching, even if on same CCX.

I've found that the CPU 'effective' speed (HWInfo) can be misleading (a little) in that (even at defaults) it can show stretching of about 200MHz which I'm not sure is happening as this reading is a kind of average.

It seems my CPU needs more juice than the average 3900x, though I do still have lots of experiments to do, including the SoC and VDDG voltages. I still can't boot with either of my XMP profiles as I could before so need to do some work there - I've booted with my memory at 4600MTs before, but since ver 3xxx bios i've not been able to do that, though that might be because I've got 4 dimms now.

So loads to still experiment with, but I am thinking of selling it and going back to my 1700x which can run memory faster than this at 1:1. I'll pick up a zen 3 when the silicon is more mature than my 3900x which came straight from the factory close to launch.

Happy for any suggestions and/or corrections!

Edit: Just thinking about my 1700x - it also runs at 4.2GHz which is fastest speed I see most of the time on my 3900x !

Current Bios - 3103

Also have Ryzen 5 3500U with Vega 8 GPU | Lenovo IdeaPad C340-14API | 8GB DDR4 2666 @ 2400 (for some reason) | Samsung 981 256GB NVME
About me: I am dyslexic and DO occasionally miss things!
There are 10 types of people, those who understand binary, and those that don't. F people in 10 don't understand hexadecimal
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ASUS Blueray
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RM 1000X
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Fractal Design S36 AIO
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Last edited by crakej; 07-28-2020 at 09:53 AM.
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post #12004 of 12039 (permalink) Old 07-30-2020, 05:35 AM
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So the new 3600C15 I bought turned out to be better than the old, but not capable of 14-14-14-14. The new 4400C19 can do 14-13-13-13. Though there are some saying that the memory controller rounds up the odd values to even values. I know it will change tCL, but that's a verifiable change. Anyone know anything for certain?
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post #12005 of 12039 (permalink) Old 07-30-2020, 10:02 AM
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I have been playing around a tiny bit with my 3900x, been running default/auto speed and voltages since I installed it with pbo disabled. I’ve never got around to trying the edc bug ( I’m an amateur at this please bear with me) but last week I set the voltage to 1.25 @ 4.3ghz on all cores. No issues or anything I guess I just want to know if Ryzen Master is the only way to do a per ccx oc? I had nothing but issues with RM last year on my old AMD setup and swore I would never touch that software again. Any specific mobos that will let me change this right in the bios without using RM?


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post #12006 of 12039 (permalink) Old 07-30-2020, 11:05 AM
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Quote: Originally Posted by BIRDMANv84 View Post
I have been playing around a tiny bit with my 3900x, been running default/auto speed and voltages since I installed it with pbo disabled. I’ve never got around to trying the edc bug ( I’m an amateur at this please bear with me) but last week I set the voltage to 1.25 @ 4.3ghz on all cores. No issues or anything I guess I just want to know if Ryzen Master is the only way to do a per ccx oc? I had nothing but issues with RM last year on my old AMD setup and swore I would never touch that software again. Any specific mobos that will let me change this right in the bios without using RM?


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Yeah, the latest BIOS (3103) has it.

AMD Ryzen 3900X  |  Fractal Design S36 360 AIO w/3 Corsair SP120L and 3 Noctua NF-F12 3000 fans  |  Asus Crosshair VII WiFi X470  |  G.SKILL TridentZ 3600CL15 2x8GB @ 3800MHz 14-15-14-14-30  |  EVGA 1070 Ti SC GAMING ACX 3.0 Black w/NZXT Kraken G12 Cooler  |  Samsung 970 EVO M.2 NVMe 500GB - Boot Drive  |  Samsung 850 EVO SSD 1TB - Game Drive  |  Seagate 1TB HDD - Media Drive  |  EVGA 650 G3 PSU | Thermaltake Core P3 Case 
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post #12007 of 12039 (permalink) Old 07-30-2020, 12:45 PM
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Sweet dude thank you, I’ll give it a download tonight


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post #12008 of 12039 (permalink) Old 07-30-2020, 02:27 PM
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Step 1-5 / Getting to know your Boosting Ryzen

@BIRDMANv84 as the remake of 1usmus iOC guide was never written
Use this little post and the linked one , as help for your work

Between PBO with AutoOC and per CCX fixed OC the tutorial nearly is identical, except that you skip 4-5 steps on per CCX OC
You've likely also noticed this voltage post

Preparation Work:
- grab the windows per CCX OC tool from the first linked post
- get y-cruncher, OCCT, Cinebench R15/R20
- find your sheet creation program of choice, google/ms sheet works well
- fix your vSOC, cLDO_VDDP, VDDG CCD & IOD (use double stepping from VDDP->VDDG to account for per CCX OC on the CCD side of things)
- grab ryzen master, skip HWInfo for now
- activate inside the BIOS CPPC and CPPC preferred cores - use windows 1909 or higher, and grab the 1usmus power profile from TechPowerUP

Step 1:
- Enable pbo , 0mhz uplift, 1x scalar ~ double the rated PPT 115W = 230PPT , 200 TDC, 210 EDC
- Run Y-Cruncher with all tests enabled for 3 cycles, Cinebench both and OCCT Medium Dataset AVX2 / note down the current applied voltage on this test on a google sheet. Split it into cores, split these cores into your CCX, and split that again into 1 or two CCDs
- ^ do the same on y-cruncher but enforce it to only use 1 core ~ follow the x370 taichi post on how to do so

Step 2:
- Disable PBO fully, keep up 1usmus powerplan, keep the custom voltage except for auto vCore
- let Ryzen Master open and open Computer Management -> Performance -> Monitoring Tools -> Performance Monitor.
on the green little + sign -> Processor Information -> % Processor Performance -> add each of the threads like i have
Spoiler!
if you have no background tools (HWInfo will mess sleeping up, figured it out too late)
you should see which cores are actually golden, while each of them should sleep if the wake up time is not that often
You can verify that with Ryzen Master
- This should deliver you on stock an ACPI value of each cores and soo show which one on which CCX can keep the boost up
Ryzen master and HWInfo both use a different method to figure out real golden cores, while CPPC Preferred Cores will transmit the FIT Module data to windows and not let it overwrite by Ryzen Master or HWInfo
- Step 2 consists of the same Y-Cruncher suite where you have 2min each test to note down the allowed boosting voltage. Watch your cores and watch which one boosts and how much voltage it takes. Note this down again next to your PBO voltages
Note down your Peak ACPI value from the Performance Monitor like shown, note down which is the golden core which are the remain 2nd and 3rd place ones

Step 3:
Everything except for Cinebench can be forced with the CMD launch method to one core.
- Run Both Cinebench's on stock and doublecheck your ★★★ and ★★ cores. Ryzen Matisse will optimally let one 2 or 3 CCX to sleep and keep only one active, inside this one the 1 or 2 remain cores should keep up 300-500Mhz while two will shuffle and share the load of Cinebench Single core. Note this voltage down and note down which of these cores do switch load ! Doublecheck if they appear to be the noted two ★★★ or ★★★ + ★★ inside the same CCX

Step 4:
- Switch to OCCT medium Dataset AVX2 and start using the windows CCX OC tool
- My recommendation is to start at 4300 for 4 CCX units, and 4100 for 2 CCX units
- My recommendation also is to use a fixed stepping and work with one CCD
~ this is an abstract pattern i figured out on Matisse.
Between two CCX inside one CCD exists a fixed offset of 75-100Mhz. Using 25, 50Mhz or 125Mhz difference results in instant crashes. Figure this difference out and push that one CCD first up till at least one of both CCX start to crash. Could be 4500Mhz or 4600Mhz, then start to push one to 4450 and the other to 4650 and similar

- Figure this pattern out and when you think you reached peak stability, double check with y-cruncher all core load 1 cycle if your cores crash. Doublecheck at the end the same thing with Cinebench R20 as AVX + AVX2 are wonderful stability killers

Step 5:
- Save and keep this voltage documentation safe ! It's unique to your CPU
- Use for this testing a maximum voltage of 1.2875v VID, and adjust loadline.
- If possible adjust VDDG CCD higher but keep my voltage scaling patterns from the main post, else you crash everything
- After your debug list is done, you should notice how your silicon behaves and what the absolute lowest peak voltage is that you can run. Up to silicon luck this value will be higher (without PBO on single golden cores, as only avg all core voltage is influenced by PBO) This will be your maximum vCore you can use including vdroop.

Step 6-9 will cover how to optimise PBO with Auto OC & default boosting
But anything till step 5, the whole voltage pattern of your CPU on each of this loads and the written down "highest voltage drop on a harsh test" is key in finetuning PBO PPT, TDC, EDC.
Keep in mind, after you move away from per CCX to Enchanced PBO:
- Once enabling PBO, the allcore load (about 80-100mV bump) will be higher and the cpu has to throttle down.
- if you abuse or not abuse the EDC Bug (it's pretty much the same work just with a different range) you will have to tame the excessive pushed allcore voltage with TDC & EDC - both on 100% full throttle on these harsh tests till you meet the identical allcore voltage at XYZ frequency

But again, Step 6-9 for finetuning PBO are another huge topic
Get to know your CPU and later we can talk
Some like constant frequency, just finetuning PBO with higher boost limits is at the absolute end still the better way to go
Working against the FIT module and 4th gen boosting system, is sub optimal ~ although easier

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post #12009 of 12039 (permalink) Old 07-31-2020, 07:23 AM
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Thank you Veii, I will definitely take this into consideration, first time messing with this processor and I’ve just been gathering as much info as I can.


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post #12010 of 12039 (permalink) Old 08-02-2020, 04:48 AM
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@crakej You got this 3103 figured out yet ?? Still playaing Wow Classic so not been messing around much. Took me ******* ages to figure out *** is up with 3800/1900 had to get my volts down on SOC VDDG CCD & IOD.
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