Intel Skylake / Kaby Lake

[AdamK47]

The 8700k is going to be a killer CPU. I really hope it comes out in September. If all these leaks are true I'm 100% getting one. Will make a very nice upgrade from my 4790k.

213 with single threaded Cinebench 15 is pretty good. That's probably with the single core 4.7GHz turbo boost. My 4.8GHz 7740X gets 210.

 

[mikk]

i7-8700k looks really strong in that CPU-monkey chart. That's a 9% Singlethread increase in Cinebench R15 with only 4.4% higher clock frequency. So either there is a bigger effect from the L3 Cache size than I thought or there is something we are not aware of. Bandwidth is no factor in Cinebench.

It is unconfirmed, but Wikichip has even the lowly 8250U turbo at 3.4 GHz, the same turbo speed as the 7250U that it replaces.
https://en.wikichip.org/wiki/intel/cores/coffee_lake_u

This is KBL-R and not Coffeelake!

 

[Arachnotronic]

i7-8700k looks really strong in that CPU-monkey chart. That's a 9% Singlethread increase in Cinebench R15 with only 4.4% higher clock frequency. So either there is a bigger effect from the L3 Cache size than I thought or there is something we are not aware of. Bandwidth is no factor in Cinebench.




This is KBL-R and not Coffeelake!

Uncore frequency (L3$) is higher too, FWIW.

 

[Ajay]

Uncore frequency (L3$) is higher too, FWIW.

Ah, thanks for that fine tidbit. I was going to ask where you got that, but probably behind a paywall

 

[Arachnotronic]

Ah, thanks for that fine tidbit. I was going to ask where you got that, but probably behind a paywall

Got it from here

http://ranker.sisoftware.net/show_r...d5e2d2e2d6e5dcfa88b585a3c6a39eae88fbc6fe&l=en

Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz (6C 12T 4.4GHz/4.7GHz, 4.1GHz IMC/4.4GHz, 6x 256kB L2, 12MB L3)

Looks like the uncore turbo can go to 4.4GHz, which is a nice improvement from 7700K which goes to 4.2GHz IIRC.

 

[beginner99]

Wow, this is going to make for a killer XPS 13.

I hope so but somewhat suspicious of battery life. If that has a huge impact or means it's running at subpar frequency to conserve the dual-core might actually be the better solution for office and web stuff and the occasional multi-threaded workload.
Cool would be some kind of cooling-dock so it can run at 45w tdp or higher when docked.

 

[IntelUser2000]

I hope so but somewhat suspicious of battery life. If that has a huge impact or means it's running at subpar frequency to conserve the dual-core might actually be the better solution for office and web stuff and the occasional multi-threaded workload.
Cool would be some kind of cooling-dock so it can run at 45w tdp or higher when docked.

It probably has a minimal impact for majority of the workloads. Extra cores usually increase power in all states a bit. I expect 30 min to 1 hour reduction, if that.

Of course load is different. Even then if its at 15W TDP it would be the same.

This situation reminds me of Clarksfield. It was nice seeing Nehalem on Laptops, but it was pushing it on 45nm. If Cannonlake wasn't mostly canned it we would have been seeing decent 4 core 15W chips on Laptops. Now, its up to Icelake.

 

[IntelUser2000]

Skylake-SP core has disabled Loop Stream Detector.

I wonder, if that'll get patched back in Cascade Lake. I can see that resulting in both reduced performance and reduced performance per watt, the latter of which indirectly affect performance. I don't think the gain would be huge, but few % seems to be hard to come by.

 

[Dave3000]

I'm debating with myself whether I should go with a Ryzen 1800x or wait for the 8700k. I right now have an i7-4930k OC 4.4GHz and I'm wondering if the Ryzen 1800x at stock can beat my 4930k OC 4.4 GHz in lightly threaded games. I get 160 in Cinebench R15 single-threaded CPU benchmark which is about 5 points higher than what the 1800x gets at stock according to a review. Also based on what I read about people's experiences overclocking the 1800x, there seems not to be much headroom for overclocking so any overclock I can get from an 1800x won't make a noticeable difference than stock I presume. I don't know if my next upgrade should be 8 cores or a faster 6 core CPU with more and more apps using Vulkan and DX12 APIs. What if future games go straight to using 8 cores, still taking advantage of 6 cores but running even better with 8 cores or will the brute force of a fast 6 core CPU make up for it?

 

[VirtualLarry]

i7-4930K OC to 4.4Ghz? That's... an Ivy Bridge HEDT, 6-core, right?

Not really sure that the 1800X is that much faster. It probably is, for some applications, but ... seems kind of a sidegrade. Unless you want something new to play with.

Get ThreadRipper! (If you want to see a real major improvement in MT performance.)

 

[dooon]

Core i9-7960X(ES) No Solder
http://forum.hwbot.org/showthread.php?t=172028&page=2

^no holes because no solder

 

[TheF34RChannel]

I'm debating with myself whether I should go with a Ryzen 1800x or wait for the 8700k. I right now have an i7-4930k OC 4.4GHz and I'm wondering if the Ryzen 1800x at stock can beat my 4930k OC 4.4 GHz in lightly threaded games. I get 160 in Cinebench R15 single-threaded CPU benchmark which is about 5 points higher than what the 1800x gets at stock according to a review. Also based on what I read about people's experiences overclocking the 1800x, there seems not to be much headroom for overclocking so any overclock I can get from an 1800x won't make a noticeable difference than stock I presume. I don't know if my next upgrade should be 8 cores or a faster 6 core CPU with more and more apps using Vulkan and DX12 APIs. What if future games go straight to using 8 cores, still taking advantage of 6 cores but running even better with 8 cores or will the brute force of a fast 6 core CPU make up for it?

What ifs are irrelevant, I feel, as you can't plan for those. I'd take the 8700K as you'll get high frequency, high IPC, can run faster memory. It's the best in all things, as opposed but the competition.

Besides, not that many more things are using Vulkan; it'll be a long time until it gets the upper hand - if ever

 

[dullard]

It is unconfirmed, but Wikichip has even the lowly 8250U turbo at 3.4 GHz, the same turbo speed as the 7250U that it replaces.
https://en.wikichip.org/wiki/intel/cores/coffee_lake_u

This is KBL-R and not Coffeelake!

Do you wish to help us sort out which ones are KBL-R and which ones are Coffee Lake? All the websites are listing it at Coffee Lake, but they could all be wrong:
http://www.minimachines.net/actu/i5-8250u-coffee-lake-52883
https://en.wikichip.org/wiki/intel/core_i5/i5-8250u
http://www.startlr.com/intel-core-i5-8250u-coffee-lake-spotted-on-the-new-acer-swift-3/
http://www.bitfeed.co/page/intel-core-i5-8250u-coffee-lake-spotted-on-the-new-acer-swift-3
I'll just call it 8th generation for the time being.

Anyways, back to my point, Anandtech just updated their post as being 3.4 GHz turbo as well (see the HP image in the update):
http://www.anandtech.com/show/11732...15w-u-series-cpus-appear-on-intels-price-list

 

[mikk]

Do you wish to help us sort out which ones are KBL-R and which ones are Coffee Lake? All the websites are listing it at Coffee Lake, but they could all be wrong:

All of these listed are KBL-R, they are all wrong. There is nothing to sort out.

 

[dullard]

All of these listed are KBL-R, they are all wrong. There is nothing to sort out.

I meant in more general terms. How do we tell the difference between the two?

 

[Hail The Brain Slug]

Core i9-7960X(ES) No Solder
http://forum.hwbot.org/showthread.php?t=172028&page=2

AMD doesnt have a hole. They have solder.

That doesnt seem like any from of concrete evidence.

 

[mikk]

I meant in more general terms. How do we tell the difference between the two?

KBL-R is a 4+2 SoC for sub 20W SKUs. This is what Intel calls KBL-R and all of these listed mobile Core 8th Gen are KBL-R based. Coffeelake mobile comes next year.

 

[Arachnotronic]

I meant in more general terms. How do we tell the difference between the two?

Kaby Lake-R SKUs are basically the 4+2 SoC parts that use the same Kaby Lake PCH.

Coffee Lake-S is the 6+2 DT part, Coffee Lake-U is the 4+3e part with the updated Cannon Lake PCH on the package.

 

[Ajay]

Skylake-SP core has disabled Loop Stream Detector.

I wonder, if that'll get patched back in Cascade Lake. I can see that resulting in both reduced performance and reduced performance per watt, the latter of which indirectly affect performance. I don't think the gain would be huge, but few % seems to be hard to come by.

That been around a decade. So it's there in hardware but disabled. Wonder if there was an issue with AVX512 loops??? Seems an odd choice.

 

[jpiniero]

Don't forget about Cannonlake as well.

So you have for U parts:

4+2 Kaby Lake Refresh (I guess it's still just 14+) plus Kaby Lake PCH
4+3e Coffee Lake (14++) plus Cannonlake PCH
2+2 (40 EU) Cannonlake (10) plus Cannonlake PCH

 

[Ajay]

AMD doesnt have a hole. They have solder.

That doesnt seem like any from of concrete evidence.

It would be fairly bizarre for Intel to bifurcate it's Xeon packaging production line to add a module to soldier '-X' CPUs. Not impossible, but bizarre (for, what is likely, a high speed line).

 

[Hail The Brain Slug]

It would be fairly bizarre for Intel to bifurcate it's Xeon packaging production line to add a module to soldier '-X' CPUs. Not impossible, but bizarre (for, what is likely, a high speed line).

Oh, I'm not saying I think they will be soldered. I'm just saying a lack of a hole on the IHS doesn't really seem like solid evidence to me.

 

[Arachnotronic]

It would be fairly bizarre for Intel to bifurcate it's Xeon packaging production line to add a module to soldier '-X' CPUs. Not impossible, but bizarre (for, what is likely, a high speed line).

They won't. All of the Skylake-SP parts will use the TIM, not solder.

 

[Arachnotronic]

I'm debating with myself whether I should go with a Ryzen 1800x or wait for the 8700k. I right now have an i7-4930k OC 4.4GHz and I'm wondering if the Ryzen 1800x at stock can beat my 4930k OC 4.4 GHz in lightly threaded games. I get 160 in Cinebench R15 single-threaded CPU benchmark which is about 5 points higher than what the 1800x gets at stock according to a review. Also based on what I read about people's experiences overclocking the 1800x, there seems not to be much headroom for overclocking so any overclock I can get from an 1800x won't make a noticeable difference than stock I presume. I don't know if my next upgrade should be 8 cores or a faster 6 core CPU with more and more apps using Vulkan and DX12 APIs. What if future games go straight to using 8 cores, still taking advantage of 6 cores but running even better with 8 cores or will the brute force of a fast 6 core CPU make up for it?

Wait for the 8700K. It is a really awesome little chip.

 

[Ajay]

Wait for the 8700K. It is a really awesome little chip.

I agree, especially with the timing being this close. I originally thought that the Z370 being a essentially a Z270 was a negative, but in reality it should mean that the Z370 boards should be pretty solid from the get go (probably only needing patches for microcode updates).