Speculation on Ryzen Overclocking

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french toast

Senior member
Feb 22, 2017
988
825
136
>1GHz OC is not bad. Especially if it's all core. 1700 has 3GHz of base clock, even if at 65W. And lower power chips usually overclock bad due to silicon characteristics: weaker transistors.
I Didn't say it was bad, i actually believe 1700 would beat 7700k in gaming when both overclocked. Although this latency issue might hamper that.
 

krumme

Diamond Member
Oct 9, 2009
5,956
1,595
136
How can i fast evaluate stability on an oc?
Now that i have to go through 8c individual cores
 

antihelten

Golden Member
Feb 2, 2012
1,764
274
126
Ok so we got a bit of clarification on the Turkish OC info. These guys are totally legit.. they are from donanimhaber.com one of the oldest review sites in Turkey. Those who followed the Bulldozer launch will remember they had info which ended up being true back then as well.

donanimhaber.com legit? Is this opposite day?

These are the guys who claimed that Bulldozer would be about 50% faster than Nehalem (and thus faster than Sandy Bridge). They also posted fake benchmarks of Bulldozer from OBR, claiming that they got them from AMD.

donanimhaber are notoriously unreliable, and if they managed to get anything right about Bulldozer it would have been down to pure luck, and the fact that they claimed so many different things that they were bound to get something right.

As such I would take any info from them with a huge grain of salt, since they basically belong to the same tier as WCCFTech and their ilk.
 
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bjt2

Senior member
Sep 11, 2016
784
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Are you sure your papers are not on Pure Power/Precision boost, however? CPC did point out that there do not seem to be any technical docs on XFR, only marketing. And looncraz version of it is extremely compelling. Plus the recap highly suggests their value is that of "Pure Precision Power Boost^TM".

The last paper is on Bristol Ridge, not Zen, but the description of shadow p-states is almost identical to XFR (see below for a link to an article on XFR)

That's your speculation, isn't it?

Shadow p-states is almost like XFR (see below). The only difference is the granularity (25MHz on Ryzen, p-states on Bristol Ridge) and limits: no limits for Zen and max p-state for Bristol Ridge.

Besides, isn't Bristol Ridge die basically identical to Carrizo.

No. There are more enhancement, see here: http://www.bitsandchips.it/52-english-news/8058-xfr-and-its-anchestors
 

lolfail9001

Golden Member
Sep 9, 2016
1,056
353
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As such I would take any info from them with a huge grain of salt, since they basically belong to the same tier as WCCFTech and their ilk.
Well, you have just calmed me down.
The last paper is on Bristol Ridge, not Zen, but the description of shadow p-states is almost identical to XFR (see below for a link to an article on XFR)
I have read that article, and it needs to be established that it does not actually state what XFR is, just what it may be. And i claim that shadow p-states and the rest of stuff actually constitute Precision boost and pure power on marketing slides.
The only difference is the granularity (25MHz on Ryzen, p-states on Bristol Ridge) and limits: no limits for Zen and max p-state for Bristol Ridge.
See, precisely, granularity is not part of XFR, it is part of Precision boost, that is stated even on slide decks themselves. XFR is most likely definition of limits, but we have no evidence there are no limits on Zen either. Just that they probably do not align with stock specification.
No. There are more enhancement,
Actually, checking around the net landed me these results:
1) ACS -> Carrizo
2) AVFS -> Carrizo
3) BTC -> Carrizo
4) Reliability tracker -> Carrizo, but was only activated in Bristol Ridge
5) Digital LDO -> Well, the only mention of it i can find are from this thread in context of your posts and semiaccurate. Welp.
6) Shadow p-states -> Well, Bristol Ridge first but at this point, i would not be surprised if it was in Carrizo too, and is overall a microcode thing, since hardware required to do what it does is all present in Carrizo.
7) STAPM -> present in Carrizo too.

That, and basically a twin look of Bristol Ridge/Carrizo dies kind of reaffirms my belief.
 

hojnikb

Senior member
Sep 18, 2014
562
45
91
The last paper is on Bristol Ridge, not Zen, but the description of shadow p-states is almost identical to XFR (see below for a link to an article on XFR)



Shadow p-states is almost like XFR (see below). The only difference is the granularity (25MHz on Ryzen, p-states on Bristol Ridge) and limits: no limits for Zen and max p-state for Bristol Ridge.



No. There are more enhancement, see here: http://www.bitsandchips.it/52-english-news/8058-xfr-and-its-anchestors


that stuff could already be available on carrizo die, but just disabled for various reasons.
 

unseenmorbidity

Golden Member
Nov 27, 2016
1,395
967
96
How can i fast evaluate stability on an oc?
Now that i have to go through 8c individual cores
2 ways

You can run a stress tests for hours on end.

You run preliminary Stress tests for a few minutes, and if it seems stable, then you can simply go about your daily life. If the PC crashes later, then your change your OC.

PS: Prime95 is garbage.
 
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krumme

Diamond Member
Oct 9, 2009
5,956
1,595
136
2 ways

You can run a stress tests for hours on end.

You run preliminary Stress tests for a few minutes, and if it seems stable, then you can simply go about your daily life. If the PC crashes later, then your change your OC.

PS: Prime95 is garbage.
What would you use for preliminary stresstest?
 

antihelten

Golden Member
Feb 2, 2012
1,764
274
126
Well, you have just calmed me down.

Sorry about the buzzkill, but hey Ryzen still looks nice either way.

Besides, Donaminhaber's claims were completely useless either way, they basically said
"we overclocked an 1800X (we're not going to tell you by how much), we then tested it in a benchmark (we're not going to tell you which one), and it beat a stock 7700K (we're not going to tell you by how much)". It's classic clickbait that maintains plausible deniability, since ultimately they didn't tell us anything useful whatsoever.
 
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bjt2

Senior member
Sep 11, 2016
784
180
86
Well, you have just calmed me down.

I have read that article, and it needs to be established that it does not actually state what XFR is, just what it may be. And i claim that shadow p-states and the rest of stuff actually constitute Precision boost and pure power on marketing slides.

See, precisely, granularity is not part of XFR, it is part of Precision boost, that is stated even on slide decks themselves. XFR is most likely definition of limits, but we have no evidence there are no limits on Zen either. Just that they probably do not align with stock specification.

Actually, checking around the net landed me these results:
1) ACS -> Carrizo
2) AVFS -> Carrizo
3) BTC -> Carrizo
4) Reliability tracker -> Carrizo, but was only activated in Bristol Ridge
5) Digital LDO -> Well, the only mention of it i can find are from this thread in context of your posts and semiaccurate. Welp.
6) Shadow p-states -> Well, Bristol Ridge first but at this point, i would not be surprised if it was in Carrizo too, and is overall a microcode thing, since hardware required to do what it does is all present in Carrizo.
7) STAPM -> present in Carrizo too.

That, and basically a twin look of Bristol Ridge/Carrizo dies kind of reaffirms my belief.

According to the paper, the AVFS in carrizo only acknoledged a certain p-state if there is temperature/tdp/vcore room. On bristol ridge it was modified to calculate the max p-state usable just like XFR. Moreover only in bristol ridge there is sinergy between Boot time calibration and AVFS to calculate the maximum sustainable pstate in each condition depending also on VRMs, MB traces and silicon quality...

Quoting: "A critical path accumulator-based scheme to accurately assess true Si speed capability and address the problem of voltage margin reduction in traditional binning flows was briefly reported in [10]. While this original implementation was aimed at optimizing the per-part voltage required for target P-State frequency, in the BR implementation of AVFS, we use shadow Pstate to increase peak frequency on part-by-part basis directly when headroom is available. The peak Fmax of the product is generally limited by technology (Vmax) or by infrastructure (EDC) limits. In traditional power binning flow, each part frequency capability in the system is not precisely known. As a result, the peak frequency is set conservatively to a worst case value that can be met by target distribution of parts. Instead AVFS allows us to exactly characterize the part-specific Fmax capability, and BTC allows us to characterize the platform-specific power delivery margin. So instead of restricting to worst case power binned Fmax , at boot-time, we combine AVFS and BTC to build a frequency–voltage curve for a given part in a given platform. By solving along this curve, we can find the peak feasible frequency for this part under reliability Vmax constraints. Similarly, by combining the per-part unique leakage and active power fuses with the frequency–voltage curve, we can determine the highest feasible frequency that meets the regulator supply current specifications. We refer to these peak boost frequencies that meet the infrastructure limits (electrical design current and process Vmax ), as shadow P-States. In BR, shadow P-States enable peak boost frequencies, on average, to increase by 100 MHz over conservative traditional binning."

Moreover according to the paper, reliability tracker (calculation of the max sustainable Vcore) is absent in Carrizo.
 

bjt2

Senior member
Sep 11, 2016
784
180
86

that stuff could already be available on carrizo die, but just disabled for various reasons.

I posted an extract of the paper: on Bristol Ridge AVFS was enhanced. And other stuff is changet too...
 

lolfail9001

Golden Member
Sep 9, 2016
1,056
353
96
Sorry about the buzzkill, but hey Ryzen still looks nice either way.
Nah, i was worrying for a second i would lose the overclocking bet, nothing more.
I posted an extract of the paper: on Bristol Ridge AVFS was enhanced. And other stuff is changet too...
Die looks exact same either way (well, color scheme is different). If changes were there, they were on microcode level.
 

lolfail9001

Golden Member
Sep 9, 2016
1,056
353
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So it seems that at least MSI is confident that 1800X can indeed clock to 4.4Ghz
If you check Z270 XPOWER manual, you will see that it goes to 5Ghz for 6700k and 5.2Ghz for 7700k. If anything, it suggests that only 2% to 7% of 1800Xs will get to 4.4Ghz.

EDIT: And X99A lists it up to 4.6Ghz on 6950X. Yeah, that highest setting is de facto: "Only if you have water cooling and do not care about stability".
 
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unseenmorbidity

Golden Member
Nov 27, 2016
1,395
967
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Are these numbers legit, or is there a hidden asterik that says this is only an illustrated example?

If you check Z270 XPOWER manual, you will see that it goes to 5Ghz for 6700k and 5.2Ghz for 7700k. If anything, it suggests that only 2% to 7% of 1800Xs will get to 4.4Ghz.

Interesting. It's at least nice to know that 4.4GHz is possible.

I was expecting less OC than Broadwell-e, so this is a good result.
 
Feb 19, 2017
40
63
51
Sorry about th
donanimhaber.com legit? Is this opposite day?

These are the guys who claimed that Bulldozer would be about 50% faster than Nehalem (and thus faster than Sandy Bridge). They also posted fake benchmarks of Bulldozer from OBR, claiming that they got them from AMD.

donanimhaber are notoriously unreliable, and if they managed to get anything right about Bulldozer it would have been down to pure luck, and the fact that they claimed so many different things that they were bound to get something right.

As such I would take any info from them with a huge grain of salt, since they basically belong to the same tier as WCCFTech and their ilk.

e buzzkill, but hey Ryzen still looks nice either way.

Besides, Donaminhaber's claims were completely useless either way, they basically said
"we overclocked an 1800X (we're not going to tell you by how much), we then tested it in a benchmark (we're not going to tell you which one), and it beat a stock 7700K (we're not going to tell you by how much)". It's classic clickbait that maintains plausible deniability, since ultimately they didn't tell us anything useful whatsoever.

Hey. You said they were wrong but FX-8150 is actually performing as 1,5*i7 950 in a lot of case as a whole package. By the way this is not their claim. They say that "Internal AMD tests claims this".

So they won't lie to people. They got the chip in their hand. Why the hell they shall lie? I am a member of donanimhaber forums and this guys has a lot of exclusive news. I remember that they published the World's first review for one of the older Athlon's. Maybe you do not want to believe but they are totally not lying.
 

lolfail9001

Golden Member
Sep 9, 2016
1,056
353
96
I am a member of donanimhaber forums
I dare claim you are a little bias.
Maybe you do not want to believe but they are totally not lying.
"we overclocked an 1800X (we're not going to tell you by how much), we then tested it in a benchmark (we're not going to tell you which one), and it beat a stock 7700K (we're not going to tell you by how much)"
They did not lie, because they did not tell anything if we are sticking to facts.
 
Feb 19, 2017
40
63
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I dare claim you are a little bias.


They did not lie, because they did not tell anything if we are sticking to facts.

Naah... I do not think so. Just knowing these guys. They are not just random guys. If they did not tell anything I do not think WCCF will copy my translation and publish as news
 

IEC

Elite Member
Super Moderator
Jun 10, 2004
14,373
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Edit: Seeing claims it is 10 phase VRM. Also 1x8pin and 1x4pin CPU as well as 6pin PCI-e on bottom of board. Interesting...
 
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