PBO + PPT/TDC/EDC question..

Braidster

Braidster

Braidster

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Quick question as I'm about to dive into tuning this 5900x fully, but how do the two different PBO sections differ and which should be used to tweak in an Asus bios? The setting in Extreme Tweaker or the one in advanced options?

Also when messing around seeing how things work I used some starting point PPT etc numbers (270/140/170) and was hitting them 75/97/100 respectively, so with the EDC in particular should I keep raising it until I'm under 100%? Also the PPT should I lower the value to get it closer to 100%?
 
The 2 most important settings are curve optimizer which will adjust the voltage curve so you can get higher clocks at a certain voltage by adding a negative offset and boost override which will add MHz to the CPUs max boost by up to 200mhz silicon dependant.
 
As I type this I have gotten the rest of my ram installed finally for the full 64gb. I no longer can boot into windows at anything higher then 3600/1800 with my docp ram settings (14-16-16-36). Not sure yet if I wanna start playing with the timings to see if I can get any higher. As the actual cpu part is daunting enough already.
Currently running 300ppt/160tdc/130edc and am roughly hitting 60%/90%/104% perspectival. I found I hit the highest all core clocks with the edc around 130 any higher/lower my sustained clock speed would drop.
Again with Curve optimizer I haven't decided if I'm gonna dive right in and tweak as much as I can. Currently started at negative 5 on all core, and have started to progress downwards in increments of 5 until I fail. Once I reach that I might just back them all off a bit and leave as is. I did see in another vid on this that the secondary cores can take more undervolting then the first set so I'm going to probably just drop those down a bit further.
Once that is done I'll prolly add a little boost and call it a day. As of now on a Cinebench multi test i'm hitting 82-83deg.
 
pc-guy said:
https://www.reddit.com/r/Amd/comments/khtx1o/guide_zen_3_overclocking_using_curve_optimizer/

https://www.reddit.com/r/Amd/comments/krjnc4/advanced_guide_curve_optimizer_stability_test_and/

https://www.reddit.com/r/Amd/comments/kfpele/5800x_adjusting_ppttdcedc_limits_on_pbo_got_me/

these are useful information. a lot to absorb.
Click to expand...

Thank you very much, and yes very overwhelming to say the least. What's been hardest for me is that pretty much every guide is different, and figuring out the best of all methods has been daunting.
 
Braidster said:
As I type this I have gotten the rest of my ram installed finally for the full 64gb. I no longer can boot into windows at anything higher then 3600/1800 with my docp ram settings (14-16-16-36). Not sure yet if I wanna start playing with the timings to see if I can get any higher. As the actual cpu part is daunting enough already.
Currently running 300ppt/160tdc/130edc and am roughly hitting 60%/90%/104% perspectival. I found I hit the highest all core clocks with the edc around 130 any higher/lower my sustained clock speed would drop.
Again with Curve optimizer I haven't decided if I'm gonna dive right in and tweak as much as I can. Currently started at negative 5 on all core, and have started to progress downwards in increments of 5 until I fail. Once I reach that I might just back them all off a bit and leave as is. I did see in another vid on this that the secondary cores can take more undervolting then the first set so I'm going to probably just drop those down a bit further.
Once that is done I'll prolly add a little boost and call it a day. As of now on a Cinebench multi test i'm hitting 82-83deg.
Click to expand...
run wiht 32GB and get your CPU OC sorted first. running 64GB dual ranked ram (becomes quad rank) will require addition tweak in the IO die part of the CPU as the mem controller is on chip so to get that working you may need more voltages on mem as well as IO die and the CPU core. potentially you wont be able to run >3600MHz or at C14 speeds (C14 is quite tight timing for 3600MHz already).
 
pc-guy said:
run wiht 32GB and get your CPU OC sorted first. running 64GB dual ranked ram (becomes quad rank) will require addition tweak in the IO die part of the CPU as the mem controller is on chip so to get that working you may need more voltages on mem as well as IO die and the CPU core. potentially you wont be able to run >3600MHz or at C14 speeds (C14 is quite tight timing for 3600MHz already).
Click to expand...
I ran the system with 32gb's of the new ram for about a week and couldn't break 3666/1833. That seemed perfectly stable but wouldn't even boot anything higher, all with xmp settings of course. The 64gb's has passed TM5 Atilla with no errors so I'm pretty content with that. A slight possibility I may see how high I can tune at ca16, but again this is already more work then I want to dedicate as it.
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I have two separate kits of 4x16gb ram so just using 32gb's for 1-2% performance gain isn't in the cards. My older G.Skill Royal actually ran 2 sticks of 32gb's at 3800/1900 no problem, but I believe it's due to it being ca16, and not ca14 like the newer Corsair.

This has been stressing me tfo and last night after a bunch of failures adding offset/boost to my negative curve I just scrapped anything I had done, and went back to a 46.5ghz All Core. Going to give this another week to play with and if I don't like where I'm getting I'll just settle with an all core and call it a day.

Appreciate the input.
 
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