Coffeelake thread, benchmarks, reviews, input, everything.

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coercitiv

Diamond Member
Jan 24, 2014
6,403
12,864
136
Fair point, I used Blender because it draws the most power and seems to stress the cores the most, as evidenced by their MCE enabled 8700K @ 4.7GHz being unstable in Blender whilst being stable in everything else.
And I went for CB since it's easier to check performance numbers, see if there's proper correlation between the two claims - power usage remaining largely the same while offering up to 50% increased performance.

I can see why the Blender test is better for power tests, not sure if it's also better to assess performance.
 
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CHADBOGA

Platinum Member
Mar 31, 2009
2,135
832
136
I've decided to keep my 2600K @ 4.5 rig for awhile longer. Combined with sky high DDR4 prices that have almost doubled and benches that show I don't really need to upgrade yet, why bother.... spending $350 on RAM kind of kills any savings that comes from the cheaper mainstream platform. I'll wait for the 8 core variant to be released on the mainstream platform and hopefully by then RAM prices come back to earth. I don't want to upgrade the video card until Volta, anyways. I admit I'm tempted and this is as good a time as any for sandy and ivy bridge users to upgrade, however...
Yep the DDR4 prices are a real downer.

I've got 8gig of ram in my Ivy Bridge system and I'll upgrade that to 16gig soon as that is the maximum that Win 7 Home Premium Edition supports and all I want with this system.

But on my next system, whether I truly need it or not, I would like to have much more ram in my system and because I haven't been following ram prices for quite a while, I got quite the shock when I saw how much DDR4 is going for these days.
 

elhefegaming

Member
Aug 23, 2017
157
70
101
I've decided to keep my 2600K @ 4.5 rig for awhile longer. Combined with sky high DDR4 prices that have almost doubled and benches that show I don't really need to upgrade yet, why bother.... spending $350 on RAM kind of kills any savings that comes from the cheaper mainstream platform. I'll wait for the 8 core variant to be released on the mainstream platform and hopefully by then RAM prices come back to earth. I don't want to upgrade the video card until Volta, anyways. I admit I'm tempted and this is as good a time as any for sandy and ivy bridge users to upgrade, however...

Why would you be spending 350 and not 200 is beyond me.
I get that prices of DDR4 are high, but 200 for 16gb is not SO crazy anyway, no idea what you were planning on buying but just by looking at the price I can say it's not worth it.
 

Jan Olšan

Senior member
Jan 12, 2017
318
409
136
I already posted it in different thread which probably won't be watched by most people, but it seems i3-8350K (and likely i3-8100) are really just Kaby Lake-S dies. The stepping is the same, the components on the bottom side of the substrate look exactly the same.

http://www.portvapes.co.uk/?id=Latest-exam-1Z0-876-Dumps&exid=thread...d-pentium-silver.2521441/page-2#post-39116981

Sucks that people with 100/200 series are not allowed to buy these as cheap quad upgrades for G4560 builds an the like. If it's Kaby silicon, it could have work had Intel wanted it to. We can hope that they drop prices of Kaby Lake i5s to match, but that's probably unlikely.
 

PeterScott

Platinum Member
Jul 7, 2017
2,605
1,540
136
I already posted it in different thread which probably won't be watched by most people, but it seems i3-8350K (and likely i3-8100) are really just Kaby Lake-S dies. The stepping is the same, the components on the bottom side of the substrate look exactly the same.

http://www.portvapes.co.uk/?id=Latest-exam-1Z0-876-Dumps&exid=thread...d-pentium-silver.2521441/page-2#post-39116981

Sucks that people with 100/200 series are not allowed to buy these as cheap quad upgrades for G4560 builds an the like. If it's Kaby silicon, it could have work had Intel wanted it to. We can hope that they drop prices of Kaby Lake i5s to match, but that's probably unlikely.


I expected that. Though this is more a case of having a 4 core that will work in 370 MBs. Working in both is dicey since there are different power pins in the sockets.

There are already 4 cores for the old MBs. When the CL CPU supplies ramp up there should be a some good sales/price drops on KL parts for the old motherboards.
 

TheLycan

Member
Mar 8, 2017
34
11
36
Anyone know how RAM speed matters in games, with 8600k or 8700k? I am looking for games with 3000mhz RAM vs 3600 or more. So far for kabylake i found that mostly matters for minimum fps around 5%
 

beginner99

Diamond Member
Jun 2, 2009
5,223
1,598
136
Anyone know how RAM speed matters in games, with 8600k or 8700k? I am looking for games with 3000mhz RAM vs 3600 or more. So far for kabylake i found that mostly matters for minimum fps around 5%

It matters but with quickly diminishing returns. 3200 mhz sub cl16 seems to be the sweetspot. Above prices start to get even more ridiculous.
 

epsilon84

Golden Member
Aug 29, 2010
1,142
927
136
Anyone know how RAM speed matters in games, with 8600k or 8700k? I am looking for games with 3000mhz RAM vs 3600 or more. So far for kabylake i found that mostly matters for minimum fps around 5%

What GPU will you be running? You'll see greater differences with a high end GPU.

https://www.techspot.com/amp/article/1171-ddr4-4000-mhz-performance/page3.html

This is on the Skylake 6700K though. You would think with an extra 2 cores to feed higher memory bandwith will see bigger benefits but that's just me thinking theoretics - without actual testing we can't know for sure.
 

TheLycan

Member
Mar 8, 2017
34
11
36
So it seems it matters:
https://www.purepc.pl/procesory/tes..._i5_8600k_rzeznik_zwany_coffee_lake?page=0,45

But that's just a pin point data, i would need to get more.
For example, i am consider it to buy Corsair 3000 Mhz CL16 or put 15% more money for the G skill Trident Z at 3600 Mhz CL17 or +21% over the corsair for G Skill flare at 3200 CL14.
All is 16 GB.

I am leaning for Trident but the question is what is better choice for an 8600K that should arrive today and i plan to keep it at 4.5 Ghz?
Video card I have 970 but planning to upgrade, so i think an 1080ti will be put in the mix.

Thanks.
 

AtenRa

Lifer
Feb 2, 2009
14,003
3,361
136
So it seems it matters:
https://www.purepc.pl/procesory/tes..._i5_8600k_rzeznik_zwany_coffee_lake?page=0,45

But that's just a pin point data, i would need to get more.
For example, i am consider it to buy Corsair 3000 Mhz CL16 or put 15% more money for the G skill Trident Z at 3600 Mhz CL17 or +21% over the corsair for G Skill flare at 3200 CL14.
All is 16 GB.

I am leaning for Trident but the question is what is better choice for an 8600K that should arrive today and i plan to keep it at 4.5 Ghz?
Video card I have 970 but planning to upgrade, so i think an 1080ti will be put in the mix.

Thanks.

If you were only willing to OC up to 4.5GHz, why chose the 6C 6T 8600K at $260 + Cooler and not get the 6C 12T 8700 ($315) with 4.6GHz ST and 4.3GHz all-core turbo ??
 

epsilon84

Golden Member
Aug 29, 2010
1,142
927
136
If you were only willing to OC up to 4.5GHz, why chose the 6C 6T 8600K at $260 + Cooler and not get the 6C 12T 8700 ($315) with 4.6GHz ST and 4.3GHz all-core turbo ??

Thats a good point, the 8700 turbos quite high and makes a mildly overclocked 8600K redundant
 

amenx

Diamond Member
Dec 17, 2004
4,012
2,284
136
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epsilon84

Golden Member
Aug 29, 2010
1,142
927
136
Because 8700 is with 20% more expensive, and what is the point to pay more if im getting same performance with 8600k?

You didn't factor in the cost of a decent HSF to oc the 8600K. Once you do, they are almost the same price and you get a 6C/12T CPU rather than 6C/6T
 

coercitiv

Diamond Member
Jan 24, 2014
6,403
12,864
136
Because 8700 is with 20% more expensive, and what is the point to pay more if im getting same performance with 8600k?
It's not about the choice of 8600k in a vacuum: your were also considering spending more money to go from 3200 C16 to 3600 C17. You would gain more by staying with 3200 C16 and spending the extra money towards the 8700.

AtenRa made the calculation by also factoring in the included heatsink for 8700, so keep that in mind as well.
 
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Gikaseixas

Platinum Member
Jul 1, 2004
2,836
218
106
Guru3d had a response to the Adored vid and why the differences in benches. Involving quite obvious factors that seem to have completely escaped Adored's attention.

https://forums.guru3d.com/threads/review-intel-core-i7-8700k-processor.417223/page-12#post-5480890
From your own link:
ASUS for example has a feature that 'optimizes' performance and enables it by default. Great stuff for the novice user, but not representable for stock reference proc results as they set the turbo bin to 4.7 GHz on all cores for the 8700k. The problem is that most reviewers do not even look at such settings to disable them (which I did for the reference proc review). Basically my 8700k results are spot on as to what the 8700k really is
 

coercitiv

Diamond Member
Jan 24, 2014
6,403
12,864
136
ASUS for example has a feature that 'optimizes' performance and enables it by default. Great stuff for the novice user, but not representable for stock reference proc results as they set the turbo bin to 4.7 GHz on all cores for the 8700k. The problem is that most reviewers do not even look at such settings to disable them (which I did for the reference proc review).
This is the part where Adored was right, but there's also a part where he took assumptions for granted: the part about chip quality and how 8400 will behave in the cheaper boards from Q1 2018. There were rumors among reviewers that initial ES chips were cherry picked and retail chips have lower quality than those used in reviews. Turns out some of them are indeed worse, but some are also better than ES chips - showing we're just dealing with expected variance.

Adored says he does not believe 8400 can sustain 3.8Ghz under 6 core loads, at least not the retail chips and not on cheaper 300 series boards (enforced 65W TDP and lower max current than Z boards). Problem is there's a very clear difference between being able to sustain these clocks in heavy duty loads like CineBench / Blender / Prime etc and keeping them up in usual consumer loads such as games, browsers, archiving programs etc.

I can understand why we should criticize the way some vendors chose to enable automatic overclocking on Intel chips, it's both unhealthy and dishonest, but I fail to see why some are taking this so far as to criticize Intel for allowing higher turbo bins than the chips might be able to sustain under very heavy loads. It's free performance for both users who choose to keep their chips at stock TDP (and benefit from those clocks in light loads) and users who configure their platforms for higher TDP to keep clocks up. Intel just offered consumers a form of limited overclocking on locked chips and somehow that's a bad thing... even though we received the fully unlocked chips from AMD with open arms.

I blame some of this on reviewers too: some of them simply turned a blind eye to how the platforms behaved in terms of power & performance, and only reacted when other more scrupulous members of the press began proper investigations on the matter. Kudos to Gigabyte too for adhering to proper stock configurations and indirectly helping make this issue obvious to everybody.
 

Gikaseixas

Platinum Member
Jul 1, 2004
2,836
218
106
I blame some of this on reviewers too: some of them simply turned a blind eye to how the platforms behaved in terms of power & performance, and only reacted when other more scrupulous members of the press began proper investigations on the matter. Kudos to Gigabyte too for adhering to proper stock configurations and indirectly helping make this issue obvious to everybody.

We don't know if that's true either, as the reviewers could very well overlooked that aspect (it is easy to miss)
The thing is that Intel should have send clear instructions to everyone as they were aware of the feature. The delta from one reviewer to another somewhat confused a lot of people and that's why he got all the attention.

With that said, this does not change the fact that Coffeelake is a great chip by Intel and the best we have for gaming. I blame mostly Intel and to some extent some reviewers.
 

LTC8K6

Lifer
Mar 10, 2004
28,520
1,575
126
We don't know if that's true either, as the reviewers could very well overlooked that aspect (it is easy to miss)
The thing is that Intel should have send clear instructions to everyone as they were aware of the feature. The delta from one reviewer to another somewhat confused a lot of people and that's why he got all the attention.

With that said, this does not change the fact that Coffeelake is a great chip by Intel and the best we have for gaming. I blame mostly Intel and to some extent some reviewers.
MCE has been around since 2012 and Z77 chipsets. Why would reviewers be unaware of it?

P8Z77 / 3700K review:
One aspect to note is that, by default, ASUS has the 'MultiCore Enhancement' set to enabled. This feature overrides Intel's Turbo Boost technology - which sets the specific frequency on each core - and rather than run the stepped-up MHz on a per-core basis, all cores are run at the maximum (single-core) Turbo Boost frequency. For a Core i7-3700K this means the chip running at 3.9GHz when under load. MultiCore Enhancement is a performance-boosting feature which is appreciated, but the problem here is that ASUS doesn't draw specific attention to it; the user won't know it's running unless they go into the BIOS. We switched it off during benchmarking, keeping parity with other boards in the upcoming line-up.

http://hexus.net/tech/reviews/mainboard/41181-asus-p8z77-v-deluxe/?page=2
 
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