Intel Skylake / Kaby Lake

[AtenRa]

Has this been posted here before ??

http://www.tomshardware.com/news/intel-coffee-lake-retail-pricing,35266.html

 

[SAAA]

Yes and it still baffles me how they can state 11% single thread gain for 8700K vs 7700K with a clock speed advantage and then 17-16% for i3s with a speed deficit. The i5s too are weird when you normalize clock/clock. On average the highest end CPU has the smallest gain...

Moving onto the why that gain happens, does L3 affect any benchmark that much? Also with different results because i3s with 50% more L3 gain much more than i7s with 50% too. Then you have some early leaks from other sites... I'm pretty sure there will be some kind of IPC increase, maybe a token 5%, that's still needed after 2 years of skylake rehashes.

 

[frozentundra123456]

Yes and it still baffles me how they can state 11% single thread gain for 8700K vs 7700K with a clock speed advantage and then 17-16% for i3s with a speed deficit. The i5s too are weird when you normalize clock/clock. On average the highest end CPU has the smallest gain...

Moving onto the why that gain happens, does L3 affect any benchmark that much? Also with different results because i3s with 50% more L3 gain much more than i7s with 50% too. Then you have some early leaks from other sites... I'm pretty sure there will be some kind of IPC increase, maybe a token 5%, that's still needed after 2 years of skylake rehashes.

Well,

Yes and it still baffles me how they can state 11% single thread gain for 8700K vs 7700K with a clock speed advantage and then 17-16% for i3s with a speed deficit. The i5s too are weird when you normalize clock/clock. On average the highest end CPU has the smallest gain...

Moving onto the why that gain happens, does L3 affect any benchmark that much? Also with different results because i3s with 50% more L3 gain much more than i7s with 50% too. Then you have some early leaks from other sites... I'm pretty sure there will be some kind of IPC increase, maybe a token 5%, that's still needed after 2 years of skylake rehashes.

The CL i3 does not have hyperthreading, and maybe hyperthreading has negative scaling on ST performance in this particular benchmark? Or maybe it is related to the cache. They both have a 50% increase, but maybe the improvement is more significant at smaller levels. Overall though, obviously the line-up is much improved at every point for MT performance. The improvement in ST is surprising in some cases though. Obviously, we have to take these benchmarks with a large grain of salt until we see a much wider range of benches from independent sources.

 

[LTC8K6]

If the 8 series i3's had a little turbo boost, it would explain the ST gains...

 

[pantsaregood]

Came to say 11% increase on single-threaded performance on the i7-8700K compared to the i7-7700K isn't going to happen, but it actually looks feasible if we assume linear scaling across the board.

The i7-8700K will turbo 4.44% higher than the i7-7700K, and its IMC can officially run RAM at an 11.08% higher clock speed. If we assume RAM bottlenecks performance enough to scale linearly, then theoretically single-thread performance on the i7-8700K could outperform the i7-7700K by around 16%. The increased L3 cache should affect performance insignificantly but measurably, given that the additional 2 MB L3 on the i7-7700K does little to benefit single-thread performance over the i5-7600K.

So, that leaves us with an idealized case of ~16% gain in single-thread performance in bandwidth intensive loads, but only a 4.44% increase in performance when not bandwidth-limited. None of this requires an IPC increase in any capacity, so unless the i7-8700K can overclock further than the i7-7700K, they're going to cap out at around the same single-thread performance.

 

[LTC8K6]

The i5 and i3 do not have a memory speed advantage though, and they are still shown with large gains.

 

[LTC8K6]

I also don't think the 8700K will turbo any higher than the 7700K.

 

[Arachnotronic]

I also don't think the 8700K will turbo any higher than the 7700K.

1 core turbo is 4.7GHz, and 2 core turbo is 4.6GHz.

 

[Bouowmx]

Spoiler: Tom's Hardware chart

Has this been posted here before ??

http://www.tomshardware.com/news/intel-coffee-lake-retail-pricing,35266.html

The exact chart has not been posted but the info is all known already.

 

[Ajay]

Now....waiting....for....reviews....

Since the 8700K hasn't even been officially launched, I guess i'll be waiting a while
Intel, you tease!

 

[LTC8K6]

The exact chart has not been posted but the info is all known already.

As usual with any leak, we do have to caution that the information may not represent final, or even actual, specifications or pricing.

 

[LTC8K6]

Also the slide that Anandtech confirmed as genuine via two sources, really does not seem to show 4.7 as the single core turbo speed for the 8700K.

According to two separate external sources with knowledge of the matter, the slide is up-to-date and genuine.

http://www.anandtech.com/show/11729...n-desktop-details-core-i78700k-to-core-i38100

 

[Sweepr]

Then perhaps you would like to explain why there's a Core i7-8700K running with 4.7 GHz Turbo inside a Dell PC according to SiSoftware.

 

[Ranulf]

I hope those prices aren't final. $60 premium for the 8700K is a bit much.

 

[Dayman1225]

http://www.anandtech.com/show/11748...-stratix-10-fpga-live-blog-845am-pt-345pm-utc

Live blog about Intels EMIB going on rn, might interest some of you

 

[JoeRambo]

Then perhaps you would like to explain why there's a Core i7-8700K running with 4.7 GHz Turbo inside a Dell PC according to SiSoftware.

12MB L3 is probably bogus as well if we are to believe some earlier claims from some guys in this thread 4.7Ghz ST turbo and 12MB of L3 driven by 4.4Ghz uncore combined with fast memory are going to surprise some guys that's for sure.

 

[eddman]

This is getting confusing.

S, SP (65-95W): Coffee Lake
S, LP (35W): ? (CFL?)
H, SP (45W): ? (I suppose intel would go for 6 cores here, so CFL?)
U, SP (28W): ? (Perhaps quad-core CFL's better transistor performance would make it more suitable here?)
U, LP (15W): Kaby Lake Refresh (but there were rumors of U CNL parts too. Maybe those will be dual-core?)
Y (4.5W): Cannon Lake

 

[Qwertilot]

Very confusing

The S, LP is presumably going to be called T?! Interesting to see if they do stick with 6 cores in that power bracket or not. Maybe if they do they'll push it back 'up' to 45w where iirc it was a generation or two back?

 

[MarkPost]

Then perhaps you would like to explain why there's a Core i7-8700K running with 4.7 GHz Turbo inside a Dell PC according to SiSoftware.

and here 4.6

 

[nvgpu]

https://www.intel.com/content/dam/w...t-briefs/dual-band-wireless-ac-9560-brief.pdf

The Intel Wireless-AC 9560 adapter is a CRF (companion RF module) supporting
the 1st generation integrated Intel wireless 802.11ac solution comprised of CNVi
and a CRF. The solution provides Bluetooth 5 and 2x2 802.11ac Wi-Fi including
wave 2 features such as 160MHz channels delivering up to 1.73Gbps
and downlink MU-MIMO.

CRF: Companion RF module in M.2 form factor supporting integrated solution.
CNVi; Refers to the integrated wireless IP portion residing in the SOC/PCH.

 

[WingZero30]

HCC Skylake-X cpus listed on OCUK by Gibbo!!!

forums.overclockers.co.uk/threads/intel-bring-the-big-guns.18790643/

 

[Bouowmx]

https://www.intel.com/content/dam/w...t-briefs/dual-band-wireless-ac-9560-brief.pdf

So integrated Wi-Fi works like: appropriate technologies are put in the PCH or SoC, and then motherboard manufacturers get the physical companion module?

 

[coffeeblues]

One user's results of pushing Skylake-X memory performance -

Reddit thread: https://www.reddit.com/r/intel/comments/6v9v0n/to_test_just_how_much_memory_latency_affects/
Screenshots: https://imgur.com/a/XU6na

 

[TheGiant]

One user's results of pushing Skylake-X memory performance -

Reddit thread: https://www.reddit.com/r/intel/comments/6v9v0n/to_test_just_how_much_memory_latency_affects/
Screenshots: https://imgur.com/a/XU6na

If intel gets the mesh up with 8-10C to 4GHz, the SKL-X successor can be a gaming champ

Nice times coming

 

[TahoeDust]

One user's results of pushing Skylake-X memory performance -

Reddit thread: https://www.reddit.com/r/intel/comments/6v9v0n/to_test_just_how_much_memory_latency_affects/
Screenshots: https://imgur.com/a/XU6na

This is a great illustration of exactly what I have been seeing. My 7820x with 3600 CL16 T1 300 tRFC ram and the mesh at 3.2GHz will absolutely keep up with the 7700k in gaming.

Good stuff.