Intel Comet Lake Thread

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Ajay

Diamond Member
Jan 8, 2001
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So a Noctua d15 @stock/default settings would be a no go? lol Im not sure what i want to do for my second pc. Do i just get a 9900k and call it a day(since i have a z390 board sitting around). Do I get a z490 and instead get a 10700k? This would be an easier choice it Intel had something to actually wow us in a good way.
I thought the 10700K was going to be cheaper than the 9900K? If so, I'd wait. Look at reviews for 280mm AIOs (gamers nexxus maybe). Like DX said, 360s are not much better, if at all.
 

coercitiv

Diamond Member
Jan 24, 2014
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Do i just get a 9900k and call it a day(since i have a z390 board sitting around).
No, Comet Lake has some thermal optimizations the 9900K lacks. You will get better thermals.

Do I get a z490 and instead get a 10700k?
Nope, you don't get away easy. The 10900K dies are the best as highlighted by MSI sample testing. If you want top performance from Intel, you will pay top dollar. :smilingimp:

PS: I'm kidding, buy whatever you like unless chasing extreme overclocks.
 

Falkentyne

Junior Member
May 3, 2010
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So a Noctua d15 @stock/default settings would be a no go? lol Im not sure what i want to do for my second pc. Do i just get a 9900k and call it a day(since i have a z390 board sitting around). Do I get a z490 and instead get a 10700k? This would be an easier choice it Intel had something to actually wow us in a good way.
A NH-D15 will be just fine on a 10900k as long as you aren't trying to run prime95 on the chip. If you aren't stress testing it should be just fine. Realbench 2.56 may be a problem as I had problems with it at >5 ghz on my 9900k. Thermalright TFX gets better temps than Kryonaut, but it's unknown how well it will endure pumpout on hot chips (Kryonaut tends to get pear shaped at >85C).
 

phillyman36

Golden Member
Jun 28, 2004
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A NH-D15 will be just fine on a 10900k as long as you aren't trying to run prime95 on the chip. If you aren't stress testing it should be just fine. Realbench 2.56 may be a problem as I had problems with it at >5 ghz on my 9900k. Thermalright TFX gets better temps than Kryonaut, but it's unknown how well it will endure pumpout on hot chips (Kryonaut tends to get pear shaped at >85C).
No stress testing or benching for me. Just gaming and maybe some video encoding if my 3900x is busy at the time.
 

Markfw

CPU Moderator, VC&G Moderator, Elite Member
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May 16, 2002
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A NH-D15 will be just fine on a 10900k as long as you aren't trying to run prime95 on the chip. If you aren't stress testing it should be just fine. Realbench 2.56 may be a problem as I had problems with it at >5 ghz on my 9900k. Thermalright TFX gets better temps than Kryonaut, but it's unknown how well it will endure pumpout on hot chips (Kryonaut tends to get pear shaped at >85C).
So what you are saying, is that the people that might want an 8 core or 10 core Intel chip to do serious work and load all the cores for long periods of time, can't use any air cooler, and must seek custom water solutions ? Why buy it ?

This assumes that 280 and 360 AIO's are not as good at the NH-D15, which is what I have been told.
 

Ajay

Diamond Member
Jan 8, 2001
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So what you are saying, is that the people that might want an 8 core or 10 core Intel chip to do serious work and load all the cores for long periods of time, can't use any air cooler, and must seek custom water solutions ? Why buy it ?

This assumes that 280 and 360 AIO's are not as good at the NH-D15, which is what I have been told.
There are AIOs that are better than the D15. Its just that some are not - which is pretty pathetic. The fun in buying a 10900K would be the fact that it really needs a custom loop :D. Other than that, IDK.
 
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DrMrLordX

Lifer
Apr 27, 2000
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So a Noctua d15 @stock/default settings would be a no go?
Welllll it'll probably throttle. Launch motherboards may want as much as 250W for this chip in sustained heavy workloads. I would wait for reviews to be sure. You can go into the UEFI and set it to enforce the TDP, which for the 10900k is 125W. An NH-D15 can handle that. The most I ever personally put on an NH-D15 was ~210W which was how much power my overclocked 1800x allegedly pulled. And I did that with a custom fan config that was so loud that it would drive most people insane. For the 10900k, it would still not be enough.

lol Im not sure what i want to do for my second pc. Do i just get a 9900k and call it a day(since i have a z390 board sitting around). Do I get a z490 and instead get a 10700k? This would be an easier choice it Intel had something to actually wow us in a good way.
I would wait for someone like der8auer to do a delid on these things to see what's under the surface. The 10c dice are a new die, while the 8c and 6c dice look like the old 8c Coffee Lake die all over again. Not sure that the 10700k will get you anything that a 9900k won't except a higher TDP (so you can set it to strict 125W in UEFI and get higher clocks than what you would get with a 9900k set to 95W TDP).
 
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Accord99

Platinum Member
Jul 2, 2001
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So a Noctua d15 @stock/default settings would be a no go? lol Im not sure what i want to do for my second pc. Do i just get a 9900k and call it a day(since i have a z390 board sitting around). Do I get a z490 and instead get a 10700k? This would be an easier choice it Intel had something to actually wow us in a good way.
I don't necessarily think that twitter post provides a true picture of the 10900K's temperature in real-world usage. It looks like the system is running both CPU and GPU intensive applications at the same time. If they used a case for the test system, the 2080 Super is dumping more than 250W of heat into the case, which will affect the coolant temperature and reduce the cooling capability of the AIO.
 

repoman27

Member
Dec 17, 2018
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I would wait for someone like der8auer to do a delid on these things to see what's under the surface. The 10c dice are a new die, while the 8c and 6c dice look like the old 8c Coffee Lake die all over again. Not sure that the 10700k will get you anything that a 9900k won't except a higher TDP (so you can set it to strict 125W in UEFI and get higher clocks than what you would get with a 9900k set to 95W TDP).
Or you could go by the ordering and spec information listed on ARK. Just as the leaks had indicated, the entire Comet Lake-S product stack is based on two dies: the 10-core stepping Q0 and the 6-core stepping G1. They are not using any previous generation Coffee Lake dies or the recently released CML-H 8+2 R1 stepping at this time.

Core i5-10600KF and above are Q0 stepping and likely thinned die with solder TIM.

Core i5-10600 and below are G1 stepping and probably conventional die with paste TIM (which is fine seeing as they are all locked SKUs with 6 or fewer cores anyway).

Core i5-10400 and Core i5-10400F are the only SKUs that currently list spec numbers for both Q0 and G1 steppings.

What I'm still a little unclear on is why early benchmarks appear to show so many Comet Lake HP die steppings. The old Tweakers roadmap leak and more recent production dashboard leak led me to believe that Comet Lake-S would be a Q1'20 launch and Comet Lake-H would follow in Q2'20. It also looked like CML-H would be based on the same (or at least very similar) 10+2 HP die as CML-S. Once it became clear that CML-H would launch before the S Series, and that it would use a new R1 stepping of the previous R0 Coffee Lake Refresh 8+2 die, I figured this was entirely due to Intel needing to defend a critical market segment against the onslaught of AMD's Renoir.

However, despite ARK only listing Q0 and G1 steppings for production CML-S SKUs, benchmarks show entries for "Family 6 Model 165" steppings 0, 1, 3, 4, and 5. So were the delays actually caused by Intel needing to do multiple respins of the CML-S dies way late in the cycle in order to fix hardware bugs? Was the R1 stepping a plan B when they realized the 10+2 HP die had problems and they'd have nothing new ready in time to counter the Renoir launch?
 
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jpiniero

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Oct 1, 2010
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The new steppings could be due to new security flaw fixes.

Using the 8 core die in Comet-H was I think more due to wanting to save wafers, especially after deciding to not do any 10 core mobile parts.
 

mopardude87

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Oct 22, 2018
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Welllll it'll probably throttle. Launch motherboards may want as much as 250W for this chip in sustained heavy workloads. I would wait for reviews to be sure. You can go into the UEFI and set it to enforce the TDP, which for the 10900k is 125W. An NH-D15 can handle that. The most I ever personally put on an NH-D15 was ~210W which was how much power my overclocked 1800x allegedly pulled. And I did that with a custom fan config that was so loud that it would drive most people insane. For the 10900k, it would still not be enough.
I think that is wild how it won't work LOL. Maxing out my 3900x and my toaster of a room i only hit 84cel fully unleashing this 3900x on the stock cooler using stock default profile and LLC at High. Tomorrow i get myself a Dark Rock Pro 4. :)
 
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repoman27

Member
Dec 17, 2018
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The new steppings could be due to new security flaw fixes.

Using the 8 core die in Comet-H was I think more due to wanting to save wafers, especially after deciding to not do any 10 core mobile parts.
Security flaws being a specific class of hardware bug, and that would make sense.

What makes you so sure Intel decided not to do any 10C H-Series parts? I mean, they still could quite easily. All they need to do is bin out enough low-leakage Q0 dies and put them in a BGA package.
 

jpiniero

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Oct 1, 2010
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What makes you so sure Intel decided not to do any 10C H-Series parts? I mean, they still could quite easily. All they need to do is bin out enough low-leakage Q0 dies and put them in a BGA package.
They could do one later I guess, it just seems really unlikely.
 

repoman27

Member
Dec 17, 2018
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As I was going through the Comet Lake S-Specs on ARK, I also noticed that the Comet Lake-U v1 SKUs now list variants based on the K1 stepping. That would be the 6+2 LP v2 die with LPDDR4X support, however, there are no new SKUs listed that can actually support LPDDR4X. I wonder if/when those will ever see the light of day?
 

jpiniero

Diamond Member
Oct 1, 2010
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As I was going through the Comet Lake S-Specs on ARK, I also noticed that the Comet Lake-U v1 SKUs now list variants based on the K1 stepping. That would be the 6+2 LP v2 die with LPDDR4X support, however, there are no new SKUs listed that can actually support LPDDR4X. I wonder if/when those will ever see the light of day?
There are new U SKUs coming out tommorow. The main new feature is vPro but perhaps you will also see official LPDDR4X support.

 

Rigg

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May 6, 2020
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@Rigg
Not the best leaked review, but there are some around making it look okay-ish. If it streets for less than the 3600 I can see people wanting it. But $180 or more? It's an uphill battle. We'll see more reviews ~2 weeks from now.

$195 is gross. I know the F vairiant will be $20 ish cheaper but still. I think they just don't care at this point.
 
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DrMrLordX

Lifer
Apr 27, 2000
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Pre-order pricing can be skewed sometimes. If it stays that way though, yeah, $195 is getting a bit rich.
 
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DrMrLordX

Lifer
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Usually your board has PL1, PL2, and PL3 power limits you can tweak in the UEFI. It's going to vary from board to board. There may be a separate setting to enforce a particular cTDP.
 

coercitiv

Diamond Member
Jan 24, 2014
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Does it let you adjust tau values as well?
Yes, it did that since years ago (PL1, PL2, Tau on systems which allowed it - some notebooks didn't)

The differemce is the XTU changes are temporary and applied at every Windows start-up (I doubt this changes on the new gen).
 

phillyman36

Golden Member
Jun 28, 2004
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I said screw it and got a i7 10700k and a Maximus z490 Hero. Come September ill sell the 3900x and get Amd 4000.
 

Ajay

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Jan 8, 2001
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I said screw it and got a i7 10700k and a Maximus z490 Hero. Come September ill sell the 3900x and get Amd 4000.
Please let us know how it goes (assuming a someone starts a Comet Lake build thread). Good luck!
 

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