Precision Boost Overdrive How Much Over Max Boost You Have

opethdisciple · 31 Jul 2019 at 12:13

Lolik said:
3700x pbo +100MHz with noctua d15s ( btw it is 4.4 on the box)

Q. Why limit it to +100? It goes up to +200 doesn't it?

My logic is +200 and the CPU will boost to what ever it can up to +200. No?

I've left everything on auto regardless.. but this was before I got my 3700x.

Woodsta888 · 31 Jul 2019 at 12:15

beany_bot said:
On exotic cooling?

Post #58...on air

Lolik · 31 Jul 2019 at 12:25

opethdisciple said:
Q. Why limit it to +100? It goes up to +200 doesn't it?

My logic is +200 and the CPU will boost to what ever it can up to +200. No?

I've left everything on auto regardless.. but this was before I got my 3700x.

Theoretically it would boost higher under better cooling condition. Pbo is basically just increasing breathing space for it to boost higher (like sliders in afterburner).

R3v4n · 31 Jul 2019 at 13:17

Oh so can you increase PBO in Ryzen master itself?

I did a manual OC changed all the 3800 to 4400 and it insta crashed on prime 95. So I'm guessing that's not the way to do it since then I just put it on PBO and leave everything on auto.

ShortWarning · 31 Jul 2019 at 13:23

Just looking through some of the posts here.

I haven't checked my bios so I'm not sure what the options are but are you just setting PBO +100/200 to get those boost overclocks. Is it as simple as that?

juno_first · 31 Jul 2019 at 13:29

3600X here on an Asus x570 TUF.
No matter what I do in the bios it won't boost past 4367mhz which I've only seen once.
Usually all core settle at 4265mhz in cinebench or a game, even single core cinebench but then drop to 3.8-4.1 after.
Is it true that an all core overclock is not really doing the speed & is micro throttling beyond the scope of monitoring software?

gerardfraser · 31 Jul 2019 at 13:44

Woodsta888 said:
Regularly see 4.525 and 4.550 on my 3800X, obviously in very short bursts.

beany_bot said:
Really?? That's awfully high. Higher infact than AMDs stated "MAX". That no one really actually gets.

Well I would not be satisifed if I was either one of you guys.Both your CPU are underperforming but there will be a fix from AMD someday.
Mine 3600X does 4525Mhz like in the videos posted.I am satisfied.Forgot smiley face

Ryzen 7 3800X -4500 Max Boost on the box + up to 200Mhz=4700Mhz
Ryzen 7 3700X -4400 Max Boost on the box + up to 200Mhz=4600Mhz
Ryzen 7 3600X -4400 Max Boost on the box + up to 200Mhz=4600Mhz

Woodsta888 · 31 Jul 2019 at 13:51

I haven't added any boost overclock yet - but I think I'll have a go. Is that literally all you did was enable the over ride and add the numbers? Why only 125Mhz and not 200Mhz? Or was 200Mhz not stable?

opethdisciple · 31 Jul 2019 at 14:03

Woodsta888 said:
I haven't added any boost overclock yet - but I think I'll have a go. Is that literally all you did was enable the over ride and add the numbers? Why only 125Mhz and not 200Mhz? Or was 200Mhz not stable?

This is a question I still need answered. Why not just add +200?

Lolik · 31 Jul 2019 at 14:03

juno_first said:
3600X here on an Asus x570 TUF.
No matter what I do in the bios it won't boost past 4367mhz which I've only seen once.
Usually all core settle at 4265mhz in cinebench or a game, even single core cinebench but then drop to 3.8-4.1 after.
Is it true that an all core overclock is not really doing the speed & is micro throttling beyond the scope of monitoring software?

If it howers above 4.1 in allcore tasks (cinebench etc) - it is pbo at work , by the looks of it (mine increases from 4.0 -4.1 to 4.175-4.3 GHz ), still for those tasks multiplier oc (ccx or allcore) will defo do better (with unsafe voltage most likely). During typical whole day use in real life would show: 4 cores done 4.425; 2 - 4.45; 1-4.5; 1 - 4.4 as max hit speed. Personally after first few days playing, benching and testing my Division 2 bench would show few % better results with pbo vs 4375 MHz allcore oc, so that when i told myself : "Get your sweaty palms of that marvelous thing"

.
p.s: Ram ocking is safer and more time consuming anyways

.

Lolik · 31 Jul 2019 at 14:08

opethdisciple said:
This is a question I still need answered. Why not just add +200?

If (big IF as too lazy to check) cpu can hold it for longer periods +50 should be better than +100 for 1ms.

beany_bot · 31 Jul 2019 at 14:21

gerardfraser said:
Well I would not be satisifed if I was either one of you guys.Both your CPU are underperforming but there will be a fix from AMD someday.
Mine 3600X does 4525Mhz like in the videos posted.I am satisfied.Forgot smiley face

Ryzen 7 3800X -4500 Max Boost on the box + up to 200Mhz=4700Mhz
Ryzen 7 3700X -4400 Max Boost on the box + up to 200Mhz=4600Mhz
Ryzen 7 3600X -4400 Max Boost on the box + up to 200Mhz=4600Mhz

Nah, don't you worry I'm very satisfied. I know my CPU is performing fine and inline with 99% of people's 3700ks.

4.6ghz stock is not a realistic goal. Basically noo is getting that so don't be daft.

gerardfraser · 31 Jul 2019 at 14:28

Woodsta888 said:
I haven't added any boost overclock yet - but I think I'll have a go. Is that literally all you did was enable the over ride and add the numbers? Why only 125Mhz and not 200Mhz? Or was 200Mhz not stable?

opethdisciple said:
This is a question I still need answered. Why not just add +200?

Well my Motherboard I can select up to 500Mhz and several modes of automatic overclocking by AMD algorithms which do everything 100% stable.

EG: This screenshot is with
Enhanced Mode 4 in BIOS
AGESA AMD ComboPI1.0.0.3
AMD Ryzen™ Power Saver Plan
5 CCX Boosted to 4400Mhz
1 CCX Boosted to 4450Mhz and all cores boosted above max boost written on the box of 4400Mhz.This applies to Light loads/90% games/Cinebench single test with boost to 4525Mhz

Results

BIOS selections modes

beany_bot said:
Nah, don't you worry I'm very satisfied. I know my CPU is performing fine and inline with 99% of people's 3700ks.

4.6ghz stock is not a realistic goal. Basically noo is getting that so don't be daft.

Interesting you can be satisfied all you want.

Phil Smith · 31 Jul 2019 at 16:08

My Rzen 3600 is boosting to 4374 on single core operations. It will only clock at 4049 when all cores are under heavy load. Am I right in thinking then that PBO works best for individual cores but not as well as a manual overclock for all core performance?

opethdisciple · 31 Jul 2019 at 16:24

So the PBO + xMHz is actually the increment PBO will go up? Or the max ceiling?

Still don't fully understand why +50MHz is better than +200MHz.

juno_first · 31 Jul 2019 at 17:11

Reg overclocking memory.
Is it true the infinity fabric, memory controller & memory frequency (pre doubled) all have to match 1:1:1.
As in 3600 memory = 1800Mhz on all.
If the memory goes over 3600 then a performance hit is incurred unless perhaps the infinity fabric frequency is matched elsewhere?

opethdisciple · 31 Jul 2019 at 17:18

juno_first said:
Reg overclocking memory.
Is it true the infinity fabric, memory controller & memory frequency (pre doubled) all have to match 1:1:1.
As in 3600 memory = 1800Mhz on all.
If the memory goes over 3600 then a performance hit is incurred unless perhaps the infinity fabric frequency is matched elsewhere?

As far as I understand the maximum 1:1 ration of memory to IF is up to 3733MHz (may be 3800MHz). However after this value the IF switches to a 1:2 divider so you can configure your ram higher but your IF is halved.

gerardfraser · 31 Jul 2019 at 17:21

You can set it to whatever you want really,as far as I understand. It is a form of overclocking which can disable/bypass limits and can void warranty like anything else .

Precision Boost Overdrive/Precision Boost 2/Max CPU Boost Override allows an AMD Ryzen processor algorithm to increase clock speeds and voltages when the CPU has electrical, thermal, and/or utilization headroom to spare and can/will boost to maximum overclock for the CPU. In other words: if the processor’s analysis of its own environment indicates that it can safely go faster, it can/will ,also there is always safeguards in place.
Each CPU of 3xxx has a hard limit but Actual BIOS revisions/Chipset Drivers and AMD /Microsoft power plans have an influence on how much voltage and clock boost there can/will be for the CPU.

With 3600X both hit a limit of Max boost of 4525Mhz and not full 4600Mhz which is 4400Mhz on the box + 125Mhz,maybe if a had a better Motherboard/cooling my max could be higher up to 4600Mhz. Hope this help ,I could have copied the AMD stuff but I just wrote what I thought how it works.

gerardfraser · 31 Jul 2019 at 17:28

opethdisciple said:
As far as I understand the maximum 1:1 ration of memory to IF is up to 3733MHz (may be 3800MHz). However after this value the IF switches to a 1:2 divider so you can configure your ram higher but your IF is halved.

Depends on CPU up to 1900Mhz(3800Mhz)
After that point Memory clock / Infinity Fabric /Memory Controller will work 1:1:2
EG:
2100(4200Mhz) memory Clock
1900(3800Mhz)Infinity Fabric
1049(2100Mhz)Memory Controller

DragonQ · 31 Jul 2019 at 17:29

opethdisciple said:
As far as I understand the maximum 1:1 ration of memory to IF is up to 3733MHz (may be 3800MHz). However after this value the IF switches to a 1:2 divider so you can configure your ram higher but your IF is halved.

If you leave IF clock on Auto, it will switch to 1:2 at anything over 1866 MHz (3733 MT/s). Quite a few people seem to be able to set it manually to 1900 MHz though and retain the 1:1 ratio.