Intel Skylake / Kaby Lake

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JoeRambo

Golden Member
Jun 13, 2013
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Still that MT score is nothing to write home about. 6950X can easily do 4.3GHz.

So now we are taking ES CPU on who knows what memory setup as gospel of MT scaling on Skylake-X. It's less than count of cores, once scaled properly it is gonna be just fine.

Again, the important take away is that in CPU-Z ST bench 4.4Ghz Skylake-X equals 5Ghz Skylake-X. That is pretty much upper bound of IPC improvement.

Btw I did not bother to reply to that nice pessimization of performance estimates. 10% better with +-7% error in my book means it could be also >15% faster.
 
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Sweepr

Diamond Member
May 12, 2006
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The prices and other model details announced today, for those that didn't see!



 
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lolfail9001

Golden Member
Sep 9, 2016
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Still that MT score is nothing to write home about. 6950X can easily do 4.3GHz.
You do not know what that one can do because mind you, it is clearly a stock run, as you can tell from looking at couple of things.
I would strongly suggest at people with outdated knowledge refrain from posting about possible conspiracies when it is known that MT ratio is affected by background applications.
And I would strongly suggest certain folks to stop looking at screens with a ton of unknown information and actually use hwbot if they want to paint very dry picture. Because in case of hwbot we can actually know parameters of system.
 

tamz_msc

Diamond Member
Jan 5, 2017
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Btw I did not bother to reply to that nice pessimization of performance estimates. 10% better with +-7% error in my book means it could be also >15% faster.
Science 101: when your data point comparison is of the same OOM as the error, it's pretty much useless.
Again, the important take away is that in CPU-Z ST bench 4.4Ghz Skylake-X equals 5Ghz Skylake-X. That is pretty much upper bound of IPC improvement.
Wrong. 6700K reference score is 474.
 

itsmydamnation

Platinum Member
Feb 6, 2011
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Anyone going to guess the die size based of DDR4 memory interface relative to broadwell-E?
Ok a quick eyeball's says the cores are quite a bit bigger assuming the DDR interfaces are about the same length, there is lots of wasted space on broadwell-E so if i had to guess we are looking at something like 400-450mm sq. If the DDR interfaces are smaller then this will be wrong
 

exquisitechar

Senior member
Apr 18, 2017
666
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I'm impressed by the 8 core model's price. Really competitive with the 1800x, too bad the motherboard cost will be much higher.

Out of my price range, though. Gotta wait for 6 core Coffee Lake...
 

imported_jjj

Senior member
Feb 14, 2009
660
430
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Intel has really felt the AMD competition, who would have thought!

Looking at the line up, the i7-7820X looks to be where intel has really pushed to be as competitive as possible with AMD. 100$ more than the 1800x, but better clocks, better IPC, more PCI lanes etc. Not that bad of a deal.

Only problem is the X299 platform should be quite a bit more expensive..

Don't forget that AMD will likely have 12 cores at 600$ or even less for clocked down SKUs.
 

tamz_msc

Diamond Member
Jan 5, 2017
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You do not know what that one can do because mind you, it is clearly a stock run, as you can tell from looking at couple of things.
The only indication which may suggest that ITBM 3 is working is the reported clock speed.
And I would strongly suggest certain folks to stop looking at screens with a ton of unknown information and actually use hwbot if they want to paint very dry picture. Because in case of hwbot we can actually know parameters of system.
Elmor has a result with the i9 7900X on hwbot and it is a 5.7GHz LN2. The Nearest 6950X I can find is a 5376 MHz LN2 and it does wPrime 1024m in 48.5s compared to 44.3 seconds for the 5700MHz 7900X.
 

lolfail9001

Golden Member
Sep 9, 2016
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The only indication which may suggest that ITBM 3 is working is the reported clock speed.
Turbo boost at all working is the sign that you can't know what clocks MT score was done at. You can only know it was above base clock by unknown number.
Elmor has a result with the i9 7900X on hwbot and it is a 5.7GHz LN2. The Nearest 6950X I can find is a 5376 MHz LN2 and it does wPrime 1024m in 48.5s compared to 44.3 seconds for the 5700MHz 7900X.
Notice how i never said that hwbot results do not paint a very sad picture for Skylake-X. They do paint worse picture than any speculation on Intel's slides or chiphell leaks can muster.
LOL. Gotta love these forums. Actually in that "530" score post I ran Cpu-Z on my 5Ghz 7700K machine (with TON of background apps) and got 530
Download version 1.79 and see for yourself what the reference score for the 6700K is.
Well, looks like someone has done it for me. Much appreciation goes to him.
 

tamz_msc

Diamond Member
Jan 5, 2017
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Notice how i never said that hwbot results do not paint a very sad picture for Skylake-X. They do paint worse picture than any speculation on Intel's slides or chiphell leaks can muster.
Is that an admission that Elmor's result shows that not much progress has been made in MT performance?
Turbo boost at all working is the sign that you can't know what clocks MT score was done at. You can only know it was above base clock by unknown number.
ITBM 3 is different. It assigns threads to a single core that is allowed to boost beyond the regular turbo speed in light workloads.
 

lolfail9001

Golden Member
Sep 9, 2016
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Is that an admission that Elmor's result shows that not much progress has been made in MT performance?
Yes, backed with data i can be certain about. Unlike chiphell CPU-Zs.
ITBM 3 is different. It assigns threads to a single core that is allowed to boost beyond the regular turbo speed in light workloads.
Thread assignment is a part of it but it is the irrelevant one. The relevant part is boosting one (two now) cores higher than ST turbo bin allows. And of course only working with power management (including turbo boost) enabled.
So from the die shots, what does the SKL-X die size look like? Around 3x compared to the KBL-X die?
At least 3. That's pretty large die tbh.
 

imported_jjj

Senior member
Feb 14, 2009
660
430
136
So from the die shots, what does the SKL-X die size look like? Around 3x compared to the KBL-X die?

My guess for the large die is at 341mm2 for now, with a range of 320-350mm2 but it's tricky to make a guess based on the die shot.
No idea about the 12 cores die, guess one can try to measure from that vid but yet to do so myself.

TBH i was thinking that it just blows that we don't have a 64 cores A75 at 3.6GHz (EDIT or a bit less for a sane TDP) as an alternative to Skylake X and Threadripper. Wouldn't be that big of a chip and a VM on each 8 cores cluster would be way fun.
 

beginner99

Diamond Member
Jun 2, 2009
5,223
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6-core cheaper than expected, 8-core pretty much where it had to be expected but then again step price hike to the 10-core.

Nothing earth shattering. Still need to wait for benches and probably coffeelake and threadripper. 6-core i7-7800X still $140 more than ryzen 1600x plus $50-$100 more for the board. The i7-7800X also clearly are the worst bin of CPUs. For the i7-7820X on one hand it looks better due to higher clocks but then a Ryzen 1700 can be had for $315 and will OC to 3.8 Ghz in most cases. So you pay 48% less for max 20% less performance. And with board adn RAM costs price only gets higher for Skylake. We for sure also need dual-channel benches with skylake-x. I bet for gaming just getting 2x8Gb is good enough.

Since Ryzen clock speed seems to be limited by the process itself, the more cores it has the better in comparison to intel. 12core ryzen vs i7-7820X will be interesting.

The TIM thing is kind of a downer. For sure will push me towards ryzen.
 

tamz_msc

Diamond Member
Jan 5, 2017
3,865
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My guess for the large die is at 341mm2 for now, with a range of 320-350mm2 but it's tricky to make a guess based on the die shot.
No idea about the 12 cores die, guess one can try to measure from that vid but yet to do so myself.

TBH i was thinking that it just blows that we don't have a 64 cores A75 at 3.6GHz (EDIT or a bit less for a sane TDP) as an alternative to Skylake X and Threadripper. Wouldn't be that big of a chip and a VM on each 8 cores cluster would be way fun.
der8auer showed the delid with a 6-C SKL-X, which means the LCC die. The HCC die would be even bigger, so there is a possibility that it *might* be soldered.
 
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lolfail9001

Golden Member
Sep 9, 2016
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Reports that Skylake-X will be TIM-based are starting to arrive. There goes all that OC "headroom." Wonder how the folks planning to buy based on supposed 4.5 GHz OC are feeling right now.
Paying 5% more to SiLo for delidding it? Making up the issues out of no issues, you know.
 

blue11

Member
May 11, 2017
151
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Paying 5% more to SiLo for delidding it? Making up the issues out of no issues, you know.
Or you know, people like their processors to be under warranty, especially their $2000 processors. AMD is going to be launching "ThreadRipper" 16C SKUs; they're going to be priced at the $1k point; and they're going to be soldered with full warranty.
 
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