Coffeelake thread, benchmarks, reviews, input, everything.

Page 30 - Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech.

TahoeDust

Senior member
Nov 29, 2011
557
404
136
The reviewer over at [H] has a 8600k running 5.1GHz on air 2.5Hrs into prime 95 with a core max of 83c. These things may end up being pretty ridiculous chips for ~$250.
 
  • Like
Reactions: Zucker2k

Hayateazekura

Junior Member
Sep 25, 2017
17
14
41
I think that the i5-8400 solution will get a lot more price-competitive once the "H" and "B" boards come out for it. But by that time, we might not be far from Zen+ or Zen 2, or Zen 12nm, or whatever you want to call it. If they can pull off 4.5Ghz, or possibly 5Ghz (OK, a dream, but they got this far already with Zen), then AMD will be sitting pretty again, and all of those people that opted for Zen the first time around, will just have to upgrade their CPUs, not their whole platform.

It's entirely possible, that when Intel comes out with the 8-core consumer chips, that they might require the purchase of a Z390 board, thus preventing any future-proofing of the Z370 platform. I mean, it's pretty much up in the air at this point, but just pointing out, that this is Intel we're talking about, they already pulled that once, with Z370 / CFL, being not forward/backward compatible with other 1151 CPUs.
Intel has always supported 2 generations on a motherboard. It has been like that for the last 10 years. You need to move on from this. No amount of complaining is going to change that. The next batch of cpus will.be supported on this platform

Whats more interesting is the 10th generation. I expect Intel to go all out and make it some special 10th aniversary of the core series. Bring quad ram to the mainstream maybe even something like 30 PCIE lanes gen 4 or 5. Essentially bring X99 series to the mainstream. Making the Xeon WS the new HEDT platform with 8 or 6 ram channel or something. I dont know
 
  • Like
Reactions: Zucker2k

moonbogg

Lifer
Jan 8, 2011
10,571
2,926
136
CoffeeLake makes that whole X299 with 7740X combo look like an absolute troll move by Intel. Wow. Can't even replace the chip with one as good as 8700K. What a train wreck for 7740x and 7800x buyers. OUCH. Train wreck for me too since I just bought a 6800K. Although I'm glad I didn't wait cause i'd still be waiting until 2018 anyways, lol.
 
  • Like
Reactions: Arachnotronic

MTDEW

Diamond Member
Oct 31, 1999
4,284
37
91
It's entirely possible, that when Intel comes out with the 8-core consumer chips, that they might require the purchase of a Z390 board, thus preventing any future-proofing of the Z370 platform. I mean, it's pretty much up in the air at this point, but just pointing out, that this is Intel we're talking about, they already pulled that once, with Z370 / CFL, being not forward/backward compatible with other 1151 CPUs.
I think this guy is right on the money!
https://youtu.be/JFbUeFU-oOY?t=1946 (timestamp is at around 32:26 if the timestamped link doesn't work)
Summorized: Intel bumped up the release of coffee lake, but the new chipset wasn't ready yet so they just modified the Z270 chipset to work with Coffee Lake and called it the Z370....Next year we will see the new Z390 chipset that was originally supposed to be for Coffee Lake.
 
  • Like
Reactions: TheF34RChannel

MTDEW

Diamond Member
Oct 31, 1999
4,284
37
91
Intel Core i7-8700 and 8700K both do 4.3 GHz using all cores. This architecture (Skylake and derivatives), Multi-core enhancement can only be used on K processors.
I've been looking for information about this all over but couldn't find anything concrete. Do you have a source?
According to a Gigabyte rep in the replies to the Gamers Nexus video, multi core enhancement does work on non-k cpus and the 8700 non-k will run at 4.6ghz with multicore enhancement enabled.
https://www.youtube.com/watch?v=0juO5KuwBX4&lc=z23dwndzmkybtbspu04t1aokgzdmk4tys1b0ka0deu0gbk0h00410.1507359476815671
Sorry, i have no clue how to link to the exact reply for a youtube video, but its there.
I would love to know if this is 100% correct also.

question: so i7 8700 non-k when enabling xmp and the multi core enhancement does that lock all 6 to the 4.6 boost?
Gigabyte USA replied: Yes, it would lock the CPU at 4.6... However not all boards will enable it with XMP. Our boards for instance do not change Turbo based on XMP. You have to manually set it to on.
 
  • Like
Reactions: Bouowmx and Crono

StinkyPinky

Diamond Member
Jul 6, 2002
6,731
723
126
Still, 8700 could be a decent buy since you still get 4.6 on all cores and probably don't need to spend as much on cooling (maybe even stock cooler will work).
 

MTDEW

Diamond Member
Oct 31, 1999
4,284
37
91
Multicore enhancement working on the 8700 is a big deal. 6c/12t @ 4.6GHz for $300 is killer bang for the buck.
Yeah, i would go for that since I'm not an extreme overclocker and 4.6ghz is more than enough.

Im probably one of the few who own a 7700k / delidded that does 5ghz but I run it at 4.5ghz to keep the voltage/temps down, so a non-k all core turbo 8700 would be the perfect kind of CPU for me. ;)
 
  • Like
Reactions: Crono

coercitiv

Diamond Member
Jan 24, 2014
5,386
9,013
136
Still, 8700 could be a decent buy since you still get 4.6 on all cores and probably don't need to spend as much on cooling (maybe even stock cooler will work).
A stock cooler meant for 65W TDP to work with an OC CPU that will draw more than 100W under heavy load? Not quite my cup of tea.
 

limsandy83

Member
Apr 10, 2016
26
2
41
Sorry if I'm off-topic, but my aftermarket heatsink from Sandy Bridge CPU can be used for CL also, yes?

Edit: The box says "compatible with Intel LGA775/1156/1366 mounting clips".
 
  • Like
Reactions: psolord

tamz_msc

Diamond Member
Jan 5, 2017
3,366
3,299
136
GN did a video on CFL MCE:
As expected, substantial impact on power consumption with MCE enabled. Almost all of the top comments on the video are of the opinion that it should be off by default, as it really ought to be in the first place.

This is just like mobile SoCs 'cheating' on GeekBench.
 

MTDEW

Diamond Member
Oct 31, 1999
4,284
37
91
Sorry if I'm off-topic, but my aftermarket heatsink from Sandy Bridge CPU can be used for CL also, yes?

Edit: The box says "compatible with Intel LGA775/1156/1366 mounting clips".
My Noctua NH-D14 from my 2600k/Asus P8Z68-V Pro/1155 build worked just fine with my 1151/7700k build with the exact same mounting hardware, so it should work.
 

epsilon84

Golden Member
Aug 29, 2010
1,142
927
136
  • Like
Reactions: Zucker2k and Crono

TheF34RChannel

Senior member
May 18, 2017
786
309
136
I think this guy is right on the money!
https://youtu.be/JFbUeFU-oOY?t=1946 (timestamp is at around 32:26 if the timestamped link doesn't work)
Summorized: Intel bumped up the release of coffee lake, but the new chipset wasn't ready yet so they just modified the Z270 chipset to work with Coffee Lake and called it the Z370....Next year we will see the new Z390 chipset that was originally supposed to be for Coffee Lake.
Exactly, he is. I've been on his site for many, many years and he always tells things as they truly are. I was just about to make that post myself.

8700K pre-ordered and I'm well happy!!! :D
 

DrMrLordX

Lifer
Apr 27, 2000
20,519
9,606
136
Why, why, why are you bringing up Ryzen in this thread...?

I think that's what was meant.
Yes!

Yes. The 8700k renders a lot of CPUs irrelevant - 7700k, 7740x,7800x and to some extent 7820x too.
I am going to have to agree with that. It's funny that anyone thought the 8700k wouldn't have such an effect on the PC CPU market, but hey, there it is.

On AMD side the R7 series is made irrelevant. The main reason to buy Ryzen now would be the longevity of AM4 platform as you should be able to drop a 7nm Zen 2 in the same board and get it working with just a BIOS update.
There are some edge cases where you still want Ryzen, but now is hardly the time or place for discussing that.

Because, the topic that lead to the comment was about an 8400 for gaming and how it compares. Seeing as the 8400 does not exist in a vacuum Ryzen was brought up as a competitor to the new Coffeelake chips. Are we not supposed to judge Coffeelake against the other offerings? It would seem silly to only judge CL against CL.
I don't know if you've been paying attention, but for the longest damn time, it's been impossible to have cogent AMD vs. Intel discussions. Hyperbole and fud enters the discussion. People resort to ad hominem. It's really better to leave that crap to threads that are obviously dedicated to a comparison of CPUs from different vendors.

This is a Coffeelake thread. If you bring up Ryzen, it will stop being a Coffeelake thread. Several posters here will make sure to talk about only Ryzen, either to defend it or to decry it.

Bring up Skylake-X or Kabylake and surprise surprise, it does not happen. No problems.

These chips are legit. Finally a mainstream MT chip without having to deal with 2010 ST level Ryzen IPC.
See? This garbage is the kind of stuff we get when we get multi-vendor discussions. 2010?

Enjoy your new Coffeelake rigs, but man check the stupid at the door next time.

The TIM isn't that big of a deal. If you are into overclocking and tweaking and buy the K series you should be delidding the CPU anyway. I helped build three 7700k machines in the past 4 months and two of those were delidded. There was no difference in how far we could overclock and the temps between machines were with 5-8c. The only big difference I saw was when running prime 10-12c difference but, you don't buy a 7700k to run prime lol.
Most folks don't like to delid. Those who are doing it now with anything but direct-die watercooling, would see about the same benefit from running good (read: not cracked) solder as they would CLU on the die. It's really just a lot easier for the non-ultra-xtreme to deal with solder under the lid. For the truly hardcore, yeah, the TIM is actually a blessing since it's so much easier to get it off vs. solder. Those folks are going for direct-die cooling.

8700k is the CPU for enthusiasts. It has no tradeoffs. Highest ST, Extremely competitive MT and fantastic overclocker. This CPU will hold up very well against Pinnacle Ridge too.
We don't really know what Pinnacle Ridge brings to the table. But for the next 6-7 months, the 8700k can run mostly unopposed.

It's for high end WoW players.
Does it ship with free Blood Elf porn?

I agree, due delay on 10nm we have same 4 generations with no new tech??, its kinda insane not to push new architecture to 14nm then to wait fro AMD to take even a lot more market share
Intel may not have a new uarch they can bring to market. It's unknown what Krzanich has Intel doing behind the scenes. They've wound down VLIW, they've pulled out of mobile and IoT . . . where exactly is Intel going with their tech? For now, they've finally brought 6c/12t to the consumer desktop, so that's a good thing. It might get ugly in a year or two, though.
 

CatMerc

Golden Member
Jul 16, 2016
1,114
1,149
136
Funny you should say that, exactly when I was looking at this:
http://www.pcgameshardware.de/Coffee-Lake-Codename-266775/Tests/Core-i7-8700K-i5-8600K-i5-8400-Test-Review-1240339/2/
Witcher 3 frame times:
RoTR DX12:
HT seems to make a difference even with 6 cores, or so it seems.
I believe what's happening here is that hyperthreading is built to hide stalls like waiting on system memory.
As can be established with Intel Vtune, games tend to wait on memory a lot more than normal applications, therefore the general wisdom of 6C/6T > 4C/8T doesn't quite apply here.
Games love more threads and lower memory latency over lesser amounts of cores or higher bandwidth.
 

coercitiv

Diamond Member
Jan 24, 2014
5,386
9,013
136
What as massive difference in power consumption between the boards, caused by the Multicore enhancement and may be other things. It's a pity no reviewer tried out some bios tweaks, for example disabling the MCE on Asus boards (looks like auto is default on them).
MCE usually comes with higher voltages as well as a safety precaution to keep the system stable, although as GamersNexus found out, their 8700K was not stable in Blender with MCE enabled on the Asus board - it's probably a good idea to intervene and fine tune voltages and LLC settings in order to make sure the system is both stable and operating with optimal power draw.
 

GamingDaemon

Senior member
Apr 28, 2006
474
7
76
So just curious, where is everyone buying their 8700K from? Amazon just says it's not available :eek: NewEgg is just out of stock. Where can I go to pre-order?
 

moonbogg

Lifer
Jan 8, 2011
10,571
2,926
136
Yeah honestly if I had an 8700K I would run it lower than most people. I would keep it below 1.3v and probably land at like 4.8ghz. Some people are fine with 1.38v and 90c temps. I am not OK with it.
 

eddman

Senior member
Dec 28, 2010
239
87
101
Anyone got any proper info on the BCLK overclocking claims? I only know about this video mentioning it: https://youtu.be/HUU_XJeSLqA?t=339

... but they did not say what the achieved BCLK was, which is the most important metric to know. Claiming good BCLK OC without revealing the clock is next to saying nothing at all.

Also, they used an 8700K to simulate an 8400, which is not exactly representative.
 
Mar 10, 2006
11,715
2,012
126
CoffeeLake makes that whole X299 with 7740X combo look like an absolute troll move by Intel. Wow. Can't even replace the chip with one as good as 8700K. What a train wreck for 7740x and 7800x buyers. OUCH. Train wreck for me too since I just bought a 6800K. Although I'm glad I didn't wait cause i'd still be waiting until 2018 anyways, lol.
6800K is still a solid chip, though the 8700K is clearly much better.
 

majord

Senior member
Jul 26, 2015
427
512
136
MCE usually comes with higher voltages as well as a safety precaution to keep the system stable, although as GamersNexus found out, their 8700K was not stable in Blender with MCE enabled on the Asus board - it's probably a good idea to intervene and fine tune voltages and LLC settings in order to make sure the system is both stable and operating with optimal power draw.

I find the amount of reviews published demonstrating 'out of box' performance with MCE enabled quite astounding. why has this suddenly become OK?
 
Mar 10, 2006
11,715
2,012
126
I find the amount of reviews published demonstrating 'out of box' performance with MCE enabled quite astounding. why has this suddenly become OK?
It's not good to pass off results with MCE on (either performance or power consumption) as "stock" because that's simply not what it is -- it's an overclock. But I do think reviewers should have results with MCE both on and off, since many users will turn on MCE.
 

ASK THE COMMUNITY