14nm 6th Time Over: Intel Readies 10-core "Comet Lake" Die to Preempt "Zen 2" AM4

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Zucker2k

Golden Member
Feb 15, 2006
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It's not about power draw. The assumption is that mobo manufacturers (all of them) are setting the PL2 to 210w just because they want Intel's CPU's to look better (someone actually said this in this thread). I know you are headfast stuck to 119w being the default for the 9900k. So that means motherboard manufacturers are not setting the board to default with the PL2 at 210w but are in fact setting the PL2 to 210w right off the bat. If that's the case boards where you can manually make the change and therefore can see what the PL2 is set to. I wonder how they react to other CPU's like the 8700k. It's not going to use as much power as the 9900k, but is it still going to be at 210w? Because if it's not 210w it would imply that they are picking up the default from the CPU. Which would mean that 210w isn't motherboard manufacturers illegally overclocking your CPU by default as has been suggested, but the actual default settings of the CPU by Intel.

A note for a diagram stating general ratio for the platform while noting that it may be changed to more efficient options by hardware. Does not make a set in stone standard on what the default is.

Do you see 210W on the ARK website? That 210W was a recommendation from Intel for the 9900k review. I believe Intel came up with that figure to prevent wild disparaties between the various reviews. 210W is basically unlimited ACT. It goes without saying, that reviewers will also need the cooling to match.

Edit: Unlimited ACT = Enhanced Multithreading, which is enabled by default on most Z390 mobos
 
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Topweasel

Diamond Member
Oct 19, 2000
5,436
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Do you see 210W on the ARK website? That 210W was a recommendation from Intel for the 9900k review. I believe Intel came up with that figure to prevent wild disparaties between the reviews. 210W is basically unlimited ACT. It goes without saying, that reviewers will also need the cooling to match.

Technically nothing but 95w cooling design requirement and 130w OEM cooler recommendation exists on ARK. There is a side note in the data that says that PL2 generally is set to PL1*1.25. But also that very same note says that that calculation might not be most efficient and hardware maybe set for a different defualt. People are assuming that meant motherboard manufacturers and OEM's manually setting a higher total themselves even though Anandtech review states that the 210w was from Intel and not the motherboard supplier for the test. 119w is based on Intel's rule of thumb not a hardfast spec of the CPU or the platform.

But lets not pretend even if the default is supposed to be 119w, that Intel did it to even out reviewers experiences. They did it for one reason and it should be pretty clear what that reason is when reading the 95w analysis that Anandtech just did.
 
Mar 10, 2006
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Why is this discussion about an upcoming CPU being overrun by TDP talk? Can we talk about Comet Lake-S?
 

jpiniero

Lifer
Oct 1, 2010
14,835
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The assumption is that mobo manufacturers (all of them) are setting the PL2 to 210w just because they want Intel's CPU's to look better

I'm not disagreeing with you at all.

Why is this discussion about an upcoming CPU being overrun by TDP talk? Can we talk about Comet Lake-S?

I'm sure it's going to draw decently more than the 9900K is.
 

Topweasel

Diamond Member
Oct 19, 2000
5,436
1,655
136
Why is this discussion about an upcoming CPU being overrun by TDP talk? Can we talk about Comet Lake-S?
I think the the reason if the rumor is true it's a Coffeelake-R with two extra cores, which was a Coffeelake with 2 extra cores, which was a Kaby Lake with 2 extra cores. It's obvious that Intel can't maintain its clock lead if they keep this up. 9900K really shows how thinly stretched they are because to maintain their performance and clock lead the chip needs to use 77% more than it is spec'd to. 2 more cores is going to make this even worse.
 
Mar 10, 2006
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I think the the reason if the rumor is true it's a Coffeelake-R with two extra cores, which was a Coffeelake with 2 extra cores, which was a Kaby Lake with 2 extra cores. It's obvious that Intel can't maintain its clock lead if they keep this up. 9900K really shows how thinly stretched they are because to maintain their performance and clock lead the chip needs to use 77% more than it is spec'd to. 2 more cores is going to make this even worse.

They can just bump up the TDP/PL2 further, especially since Comet Lake-S will probably not be compatible with Z370/Z390 boards. It's really not a big deal.
 

Topweasel

Diamond Member
Oct 19, 2000
5,436
1,655
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They can just bump up the TDP/PL2 further, especially since Comet Lake-S will probably not be compatible with Z370/Z390 boards. It's really not a big deal.

And so be it. Mine and most peoples complaints here isn't about power usuage. I mean even for AMD supporter, you get to 12 cores and you are talking about 180w. A 32c "enthusiast CPU" what was it 250w. The 9900k running at 4.7 or 4.6 or whatever value it is because Intel now hides it, at 160w is probably worth the cost of doing business for the people who don't care (most). The problem is the transparency on CPU power usage, basically a useless and untruthful TDP rating, and confusion on required cooling for the unsuspecting enthusiast. This will get worse with this chip if it exists. 10c, same process, if they can maintain anything near 4.5GHz All core turbo, it's going to suck up 200w on some peoples chips. But my guess is they will think that they are covering up their manufacturing issue and meeting some OEM requirement by calling it a what a 100W TDP CPU?
 

LTC8K6

Lifer
Mar 10, 2004
28,520
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Let's put this "130W TDP" cooler thing to rest:

When required to operate with a Tcase of 65C the 2015D cooler has a max TDP of 95W. It would only be able to reach a max TDP of 130W if it were allowed to function with a higher Tcase of 72-73C.

Tcase max in the Intel doc is derived from a thermocouple mounted in a shallow groove on the top dead center of a Thermal Test Vehicle.

Tcase is apparently not a measurement we actually use in our computers, it is only a factory measurement.
The Tcase used by us is apparently a calculation set in the BIOS, based on the factory testing.

Tcase max also appears to be a max temp measured during testing at the factory at the base clock, rather than a number that won't be exceeded in the real world?
The more I read, the more slightly different info I seem to run across, and the more I doubt...
 
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epsilon84

Golden Member
Aug 29, 2010
1,142
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And so be it. Mine and most peoples complaints here isn't about power usuage. I mean even for AMD supporter, you get to 12 cores and you are talking about 180w. A 32c "enthusiast CPU" what was it 250w. The 9900k running at 4.7 or 4.6 or whatever value it is because Intel now hides it, at 160w is probably worth the cost of doing business for the people who don't care (most). The problem is the transparency on CPU power usage, basically a useless and untruthful TDP rating, and confusion on required cooling for the unsuspecting enthusiast. This will get worse with this chip if it exists. 10c, same process, if they can maintain anything near 4.5GHz All core turbo, it's going to suck up 200w on some peoples chips. But my guess is they will think that they are covering up their manufacturing issue and meeting some OEM requirement by calling it a what a 100W TDP CPU?

It all depends on the clocks and voltages used. You can probably even get a '95W' 10C Comet Lake if you reduce voltages and set the ACT at 4.0GHz. That is actually the optimal efficiency range for 14nm, at the low 4GHz range. 4.5GHz+ is all about outright performance, not power efficiency. There is a reason the 12C TRs are 180W and that is because they are clocked at 4.0GHz, the upper limit of efficient perfomance/watt for AMDs 12nm process.

FWIW even a 4.0GHz Comet Lake would still outperform a 9900K @ 4.7GHz in MT thoughput - 10 x 4.0 = 40 vs 8 x 4.7 = 37.6 and that is assuming no IPC uplift. I think Intel would probably set the ACT higher than that, but I doubt we'll be seeing sustained 4.7GHz all core boost clocks.
 
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Topweasel

Diamond Member
Oct 19, 2000
5,436
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It all depends on the clocks and voltages used. You can probably even get a '95W' 10C Comet Lake if you reduce voltages and set the ACT at 4.0GHz. That is actually the optimal efficiency range for 14nm, at the low 4GHz range. 4.5GHz+ is all about outright performance, not power efficiency. There is a reason the 12C TRs are 180W and that is because they are clocked at 4.0GHz, the upper limit of efficient perfomance/watt for AMDs 12nm process.

FWIW even a 4.0GHz Comet Lake would still outperform a 9900K @ 4.7GHz in MT thoughput - 10 x 4.0 = 40 vs 8 x 4.7 = 37.6 and that is assuming no IPC uplift. I think Intel would probably set the ACT higher than that, but I doubt we'll be seeing sustained 4.7GHz all core boost clocks.

Yeah but Intel can't let new gen be bested by old gen in any benchmark. That's not a joke. That and the potential of MT benches staying skewed towards AMD is why they went with the super high PL2. Which brings us back to IPC uplift. Don't expect anything. Icelake would be the IPC uplift. This is just Kabylake Refreshrefreshrefresh with yet another 2 cores. Intel to prevent it from looking worse than the 9900k. Needs SC speed faster than 5GHz and needs to maintain a heavy all core turbo. Maybe not even 4.5GHz like I suggested. But probably higher than 4GHz.
 

jpiniero

Lifer
Oct 1, 2010
14,835
5,454
136
But my guess is they will think that they are covering up their manufacturing issue and meeting some OEM requirement by calling it a what a 100W TDP CPU?

I guess the whole point that you seem to be missing is that the board can configure the 9900K to use more than 95W/119W without it technically being overclocking. And so if an OEM wanted to use the 9900K they would have the capability to adjust PL2/time to what their cooling can handle.

Would not be surprised if Intel just completely unrestricts K parts at stock settings and it's just the silicon lottery as to how high each core goes; assuming you can cool it of course.
 

Topweasel

Diamond Member
Oct 19, 2000
5,436
1,655
136
I guess the whole point that you seem to be missing is that the board can configure the 9900K to use more than 95W/119W without it technically being overclocking. And so if an OEM wanted to use the 9900K they would have the capability to adjust PL2/time to what their cooling can handle.

Would not be surprised if Intel just completely unrestricts K parts at stock settings and it's just the silicon lottery as to how high each core goes; assuming you can cool it of course.

No that is exactly what I am counting on and it's why I am disappointed. In the end I do have a desire for an enthusiast to also be learned Enthusiast. But that isn't true. What this does is make a 9900k OEM machine practically be a completely different processor performance wise. And people grabbing retail CPU's will have little cooling information to go on and if not careful they will be perpetually toasty. All so they could retain the power ceiling OEM's desire and hide the fact that the process isn't really advancing even though they try calling it 14nm++++++++++.
 

LTC8K6

Lifer
Mar 10, 2004
28,520
1,575
126
No that is exactly what I am counting on and it's why I am disappointed. In the end I do have a desire for an enthusiast to also be learned Enthusiast. But that isn't true. What this does is make a 9900k OEM machine practically be a completely different processor performance wise. And people grabbing retail CPU's will have little cooling information to go on and if not careful they will be perpetually toasty. All so they could retain the power ceiling OEM's desire and hide the fact that the process isn't really advancing even though they try calling it 14nm++++++++++.
Intel calls it 14nm++.

There is only 14nm, 14nm+, and 14nm++.

Three gens only.
 

coercitiv

Diamond Member
Jan 24, 2014
6,395
12,828
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Tcase max also appears to be a max temp measured during testing at the factory at the base clock, rather than a number that won't be exceeded in the real world?
The more I read, the more slightly different info I seem to run across, and the more I doubt...
Tcase is the temperature the heatsink is exposed to and directly dictates the amount of heat the cooler can dissipate. If Intel says the 9900K must have a Tcase of 65C with the reference cooler (2015D) then the TDP of the cooler for that corresponding Tcase is 95W. This is a scientifically certainty, there is no marketing way around it.

Intel datasheet is describing a 95W TDP 9900K processor beyond any doubt. Every detail, from cooling to power limits, is clearly aligned with this goal. The engineers did their proper job as usual, whatever happened afterwards was upper management / marketing related.
 

PotatoWithEarsOnSide

Senior member
Feb 23, 2017
664
701
106
It should do.
At 95w it is doing 4.2GHz on all 8 cores, versus 4.1GHz on all 8 cores of the 2700x. We already know that Intel has an IPC advantage of maybe 8%. Overall, that's a near 10% advantage.
However, it's not the advantage that you'd be wanting for its price tag. That's where 24/7 overclocking comes to the fore for the 9900k, assuming you can cool it.
The 9900k has a 10% performance advantage at 10% lower power than the 2700x; the 2700x pretty much goes 24/7 at 105w versus 95w for the 9900k.
This lead evaporates with Zen 2, assuming the leaks turn out to be true; 13-28% IPC uplift, and 40-50% more power efficient. At that point only clockspeed will determine whether the next gen Ryzen CPU has equivalent or better overall performance than the 9900k; the 9900k being overclocked to its max.
 

epsilon84

Golden Member
Aug 29, 2010
1,142
927
136
It should do.
At 95w it is doing 4.2GHz on all 8 cores, versus 4.1GHz on all 8 cores of the 2700x. We already know that Intel has an IPC advantage of maybe 8%. Overall, that's a near 10% advantage.
However, it's not the advantage that you'd be wanting for its price tag. That's where 24/7 overclocking comes to the fore for the 9900k, assuming you can cool it.
The 9900k has a 10% performance advantage at 10% lower power than the 2700x; the 2700x pretty much goes 24/7 at 105w versus 95w for the 9900k.
This lead evaporates with Zen 2, assuming the leaks turn out to be true; 13-28% IPC uplift, and 40-50% more power efficient. At that point only clockspeed will determine whether the next gen Ryzen CPU has equivalent or better overall performance than the 9900k; the 9900k being overclocked to its max.

The 2700X actually doesn't hold 105W 24/7 - in fact it can draw in excess of 140W, as shown by GN: https://www.gamersnexus.net/hwrevie...w-game-streaming-cpu-benchmarks-memory/page-3

If we are to hold Intel to a certain standard, particularly after the 9900K situation, then we shouldnt allow AMD a free pass on 'misleading TDPs' as well. The 2700X power draw also freely exceeds its official TDP rating. Are mobo makers at fault for that as well? Why aren't there calls for the 2700X to be limited to 105W max power draw in reviews? In reality a '140W' 2700X is 10% slower than a '95W' 9900K.

It would actually be interesting to see how a 2700X performs when hard limited to 105W compared to a 95W configured 9900K. What kind of clockspeed can it sustain at 105W? 3.7GHz? Maybe 3.8GHz? Are AMD chips even configurable in this manner?

This also throws off your efficiency calculations / predictions for Zen 2. Even if it was 50% more efficient than Zen+ as per the upper ranges of your estimate, that would only bring it in line with an 'in spec' 9900K @ 95W.

The 9900K is actually a very efficient CPU when 'properly' configured. To stay on topic with the OP, I do believe Comet Lake also has the same potential for efficiency as long as TDP / PL2 guidelines are adhered to. If not, we will have the same situation with the 9900K, only this time with an extra 2 cores. Yikes.
 
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Thunder 57

Platinum Member
Aug 19, 2007
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The 2700X actually doesn't hold 105W 24/7 - in fact it can draw in excess of 140W, as shown by GN: https://www.gamersnexus.net/hwrevie...w-game-streaming-cpu-benchmarks-memory/page-3

Well, I guess it depends on testing methodology as well as who you believe. Anand has the 2700X just over 106, and Toms has it a hair lower.




Interestingly, in the 9900k review on Anandtech the power draw for the 2700X was listed higher around 117, but Tom's 9900k stayed the same for the 2700X. I guess they did not retest since their methodology looks the same.



 
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scannall

Golden Member
Jan 1, 2012
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The 2700X actually doesn't hold 105W 24/7 - in fact it can draw in excess of 140W, as shown by GN: https://www.gamersnexus.net/hwrevie...w-game-streaming-cpu-benchmarks-memory/page-3

If we are to hold Intel to a certain standard, particularly after the 9900K situation, then we shouldnt allow AMD a free pass on 'misleading TDPs' as well. The 2700X power draw also freely exceeds its official TDP rating. Are mobo makers at fault for that as well? Why aren't there calls for the 2700X to be limited to 105W max power draw in reviews? In reality a '140W' 2700X is 10% slower than a '95W' 9900K.
Those power draw numbers look like PB0 is enabled. (The warranty killing built in overclock). On my 2600X, it holds to a strict 95 watts period, since I haven't enabled that feature. I may at some point, just for humor. But since I'm getting 4.2 across all cores I don't really see the point. That will likely drop in the summer as it will be quite a bit warmer in this room though.
 

epsilon84

Golden Member
Aug 29, 2010
1,142
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Those power draw numbers look like PB0 is enabled. (The warranty killing built in overclock). On my 2600X, it holds to a strict 95 watts period, since I haven't enabled that feature. I may at some point, just for humor. But since I'm getting 4.2 across all cores I don't really see the point. That will likely drop in the summer as it will be quite a bit warmer in this room though.

Those are stock numbers. There are overclocked 4.2GHz @ 1.4V numbers also for the 2700X at 192W.

'The Stilt' also got 140W in his own personal review of the 2700X - his findings are in the 'strictly technical Ryzen' thread, around page 75 IIRC.
 

epsilon84

Golden Member
Aug 29, 2010
1,142
927
136
Well, I guess it depends on testing methodology as well as who you believe. Anand has the 2700X just over 106, and Toms has it a hair lower.




Interestingly, in the 9900k review on Anandtech the power draw for the 2700X was listed higher around 117, but Tom's 9900k stayed the same for the 2700X. I guess they did not retest since their methodology looks the same.




It's not about 'who I believe' but the fact that there are numerous results that show the 2700X exceeding 105W. The Stilt also got 140W from his review.

Another one: https://www.guru3d.com/articles-pages/amd-ryzen-7-2700x-review,7.html

199W system power draw in CB when idle is measured at 51W. That leaves 148W delta. From experience only the CPU and RAM is actively engaged during a CB run, and the vast majority of that 148W difference will obviously be from the CPU.

Also https://techreport.com/review/33531/amd-ryzen-7-2700x-and-ryzen-5-2600x-cpus-reviewed/8 showing 195W system power draw in Blender, a full 50W more than the 8700K system.

There are plenty more reviews showing similar findings, which is why I find the lack of scrutiny regarding the 2700X power draw surprising. At the very least with the varied power figures across different reviews it warrants further investigation just like the 9900K did.
 

Abwx

Lifer
Apr 2, 2011
11,167
3,862
136
The 2700X actually doesn't hold 105W 24/7 - in fact it can draw in excess of 140W, as shown by GN: https://www.gamersnexus.net/hwrevie...w-game-streaming-cpu-benchmarks-memory/page-3

Of course you forgot to point that it s 143W measured at the 12V ATX rail, before VRMs and routing losses, even at 88% efficency this wouldnt be more than 125W while the 165-185W consumed by the 9900K are measured in the CPU package sensors, if measured at the 12V rail they would amount to 185-210W, roughly...

Anyway quite a methodology of yours here, out of curiosity i checked the power for Cinebench at Computerbase for the 2700X, they measured 147W delta at the main, so how could GN measure as much at the 12V rail with the same software....?

https://www.computerbase.de/2018-06...ition-cpu-test/2/#abschnitt_leistungsaufnahme

I once asked you to point other reviews that would confirm GN numbers, of course no answer, instead yo keep using this case wich is apparently flawed and not even reproducible, if it is could you point another review that say so..?..
 
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