Hi guys,

Just rejoined AMD club after more than a decade lol.

Since I'm on stock cooler, not messing with the cpu freqs, just adjusted the curve optimizer per core. Waiting for my waterblock to arrive hehe

IF wise, I can go only up to 1866Mhz. Tried every VSOC and both VDDG possible ranges and still cant post at 1900Mhz. Prolly have to wait on any new bios updates for my B550i AX.

RAM wise, I'm using 2x16GB of Corsair LPX rev 3.44. Thaiphoon indicated Micron Rev B 16Gb chips and there's no starting point available in the DRAM Calc for the target freq (3733Mhz since my IF can only max at 1866Mhz).

So while keeping the VDIMM at 1.35v, VSOC at 1.1v, both VDDG at 0.95v and VDDP at 0.9v, I did the old skool way. Tighten the each timings to get the lowest possible POST, MemTest86 1pass to find errors, if get errors than back up one bit, then rinse and repeat for each.

This is what I get, tested via the bootable Memtest86 standard 4 passes.



I guess this good enough? Wondering if I can do something with the resistance stuff (ProcODT & DriveStrengths) to get better primaries, 18-21-17-33 looks weird, but hey it works

This post has been edited by x800: Jan 31 2021, 08:16 AM

Yup its SR (16Gb dies for a 2x16kit).

I can't post at 1900Mhz FCLK, but 1933Mhz posts fine with 25mv higher VSOC and VDDG (at 1.125v and 0.975v respectively).

1966Mhz or 2000Mhz also wont post with whatever VSOC and VDDG I give.

I'll prolly redo the RAM timings all over again for 3866 to match 1933 FCLK this coming week.

Edit: 1933fclk gave WHEA errors in Hwinfo, with whatever voltages. Gonna stop at 1866fclk now

This post has been edited by x800: Jan 31 2021, 03:46 PM

Nice....I'm still stuck with the 1900IF black hole...And my RAMs cannot do CL16 unless I set 1.4v in BIOS

But the thing is with my board, even with setting XMP 1.35v in BIOS, the VDIMM reading in BIOS and HWINFO shows about 0.3-0.6v offset..1.38v idle and 1.41v load.

Ryzen Master and ZenTimings still show 1.35v tho...I don't know which voltage reading to trust so I just set it at 1.35v theres no voltage pins on the board for me to measure myself

This post has been edited by x800: Mar 7 2021, 08:38 AM

Opps sorry typo on my part there, the offset is 0.03 to 0.06, not 0.3 to 0.6

Yeah I'll just live with rams and board, and do what I can to tweak it as much as I can.

BTW did you tweak ur CO in your hyperpi runs there?

What did you set your PBO limits (PPT, TDC, EDC) to? If its stock 5600x limits (i.e. 76w 60a 90a) then it makes sense for the effective clock to be limited to those values

But if you already set PBO limits to motherboard, idk...maybe someone else can help?

I'll test the 200mhz settings for a while to check if mine also give the same behavior, brb

Edit: ok no point in testing, since I remember I already did this before. with pbo limits set to motherboard, the mhz offset will help single single thread, but wont help much in multithread since its already the silicon limit. during CB MC runs is still around 4675mhz for me, but SC does boost to 4850mhz

This post has been edited by x800: Mar 7 2021, 10:13 AM

AFAIK the only way to check in BIOS is only if you set the PBO Limits to "Manual" and change them.

In windows, either use RM to check like you did, or use HWINFO divide the watts/amps with respective percentages:


BTW on my board, setting PBO Limits to "Disable" is setting it to default 5600x limits i.e. 76w 60a 90a. Screenie of my UEFI setting and the respective RM screenie during CB MC run:


Perhaps ASUS implements the PBO Limits "Disable" differently...sorry I cant help...

This post has been edited by x800: Mar 7 2021, 08:36 PM

For my daily settings i cap at stock PBO Limits, as the 20% increase in power consumption and temps are not worth the 10% increase in performance. Furthermore, that 10% performance increase is also only reflected in benches and not my actual gaming experience since I'm gaming at 3440x1440 and GPU makes a bigger difference. I tweak everything focusing on power efficiency for daily profile, even my GPU is undervolted..


Nonetheless, when I'm doing bench runs, I unleash everything with manual OC

I agree. I'm also worried if any of my components get higher than 60c.

I observe no matter how much cooling potential is available, the die temp of these zen chips will still spike quite high if I unleash it, prolly coz of the small physical size of the die itself and heat transfer from the die to ihs to coldplate not efficient enough. Thinking to direct die but I doubt it'll make much difference. Also prolly coz I use a cheapo block lol

Haven't run any superpi/hyperpi for more than a decade.



What actually affects it the most anyway? cpu/IF/mem/everything?

Edit: found a really old post of mine...last time i did superpi runs was with an athlon64 3000+ venice with DDR1...that time 1M superpi took 30seconds...now 10seconds..i expected much more improvements (prolly should be around 5secs?) for 15 years of tech advancements....

This post has been edited by x800: Mar 8 2021, 09:31 PM

ahh ok that last part makes sense. This os is a clean install when I migrated from devilscanyon 2 months ago. thanks!

Idk how true this is, but i read some reddit and other forum posts out there saying that 1.35v++ is ok if only a few cores being boosted in short bursts, but its getting unsafe if that 1.35v++ is during sustained allcore boosts.

The cpu will definitely reduce its boosts a bit when it reaches that set temperature, but if u feel that it doesnt affect your specific game performance then why not.

This post has been edited by x800: Mar 11 2021, 06:45 PM

Finally able to snatch the Firestrike top spot for 2080ti+5600x after tweaking the PBO CO, PBO Offset and Vcore Offset wheee~

Leaderboard

2nd guy had more Graphics score as me, but the PBO tweak made me pull ahead in the Physics and Combined score and sums up in Overall score

Comparison of individual results

ah_khoo is right, no need manual OC anymore


Edit: corrected links and added context

This post has been edited by x800: Mar 12 2021, 07:30 PM

I envy ppl who won the silicon lottery...

Never won any silicon lottery in my life, all my past and current cpus are just average bin. Dont have the privilege of some countries where you can return/exchange a cpu because its not a good bin.

Nonetheless I just work with what I have lol.

Anyone have a spare renoir or micron rev E lying around? hands itchy already nothing more I can play around with on my 5600x

Thanks for the info, I'll keep this in mind

Just wanted to play around with the hardware, its as fun as playing games on the hardware (at least for me)..and I dont play games much these days anyway

That said, I might as well wait for desktop cezanne, hopefully still monolithic die

This post has been edited by x800: Mar 29 2021, 10:39 AM