Intel "Coffee Lake" Builders Thread

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elhefegaming

Member
Aug 23, 2017
157
70
101
Wow...It looks like the 8700k is binning out pretty nicely. Silicon Lottery binning results and prices including deliding...

4.9 GHz @ 1.387v: 100% - $449
5.0 GHz @ 1.400v: 81% - $479
5.1 GHz @ 1.412v: 58% - $539
5.2 GHz @ 1.425v: 30% - $659
5.3 GHz @ 1.437v: 6% - $999

I'd get the 449 in a heartbeat. That's cheap
 

TahoeDust

Senior member
Nov 29, 2011
557
404
136
I definitely will. I think I may wait until next weekend to build my new rig as my 1080 Ti should be here by then.
Nice. You may be able to do it at lower voltage than they binned it at. Just because they could not bin it at 5.2GHz @ 1.425, doesn't mean it can't do 5.1GHz @ 1.375v.
 

nOOky

Diamond Member
Aug 17, 2004
3,004
2,026
136
I also have assembled my new system with an i7-8700K and look forward to seeing how it fares. I am running the Asus supplied Intel tuning utility overnight @ 5GHz just for kicks and I'll spend more time figuring things out in the coming week.
 

ozzy702

Golden Member
Nov 1, 2011
1,151
530
136
I'm seeing a lot of sub 4000 memory here. Anyone doing something like this yet?



I'm sure it's very much possible. I'm just not sure why it isn't more common.

From what I can tell, memory support still sucks. Not bad for a launch, but we'll need a few bios revisions to see screaming speeds. GSKILL has some 4600mhz stuff coming for z370 so I expect to see each vendor releasing more stable bios's soon to enable that memory. I'm currently running 3600mhz 15-15-15-35 1T and it's decent.
 
Reactions: Arachnotronic

AdamK47

Lifer
Oct 9, 1999
15,550
3,254
136
I've been running 4133 at CAS 16 completely stable since July. I'm torn on getting an 8700K. Maybe I'll just wait for something better next year.
 
Reactions: Arachnotronic
Mar 10, 2006
11,715
2,012
126
I've been running 4133 at CAS 16 completely stable since July. I'm torn on getting an 8700K. Maybe I'll just wait for something better next year.

Good idea, IMHO. 8 core CFL should be here next year on Z390 chipset, which will be better than Z370.
 

coercitiv

Diamond Member
Jan 24, 2014
6,633
14,075
136
Good idea, IMHO. 8 core CFL should be here next year on Z390 chipset, which will be better than Z370.
I thought advising people to wait for the next year launch was something you were reluctant to do, since there's always something better on schedule for "next year", especially for enthusiasts such as AdamK47.
 

ehume

Golden Member
Nov 6, 2009
1,511
73
91
I looked only at low profile RAM. I found obscene prices and limited availability above 3200K, so that's what I got. Why low profile? CPU heatsink compatibility, since I test them. But think about it: we used to have low profile DDR3 at 1.65v. Who needs tall heatsinks when the voltage now is 1.2-1.35v?
 
Aug 11, 2008
10,451
642
126
I thought advising people to wait for the next year launch was something you were reluctant to do, since there's always something better on schedule for "next year", especially for enthusiasts such as AdamK47.
True, and generally good advice, I think. But OTOH, he just upgraded so it might make sense to wait. Despite all the enthusiasm for more cores, 7740k (I think he has a very good overclock) is still a great gaming chip for at least another year or two. My only reservation would be is whether we will really see 8 core CL and if so when it will be. Personally, I am still running an i5 2320, and might look for a really cheap close out pre-built with a 7700 or 7700k. That would be more than enough cores for me, but I would like something with better lightly threaded performance. I game much less than I used to so, it would be more than enough for that as well.
 

jpiniero

Lifer
Oct 1, 2010
15,177
5,717
136
Wow...It looks like the 8700k is binning out pretty nicely. Silicon Lottery binning results and prices including deliding...

4.9 GHz @ 1.387v: 100% - $449
5.0 GHz @ 1.400v: 81% - $479
5.1 GHz @ 1.412v: 58% - $539
5.2 GHz @ 1.425v: 30% - $659
5.3 GHz @ 1.437v: 6% - $999

That's really good. You can see why Intel would dump Icelake desktop for 8C CFL; 10+ clock speed won't come close to this.
 

PeterScott

Platinum Member
Jul 7, 2017
2,605
1,540
136
True, and generally good advice, I think. But OTOH, he just upgraded so it might make sense to wait. Despite all the enthusiasm for more cores, 7740k (I think he has a very good overclock) is still a great gaming chip for at least another year or two. My only reservation would be is whether we will really see 8 core CL and if so when it will be. Personally, I am still running an i5 2320, and might look for a really cheap close out pre-built with a 7700 or 7700k. That would be more than enough cores for me, but I would like something with better lightly threaded performance. I game much less than I used to so, it would be more than enough for that as well.

Yeah, we don't even know there is an 8 Core CL, or if we have to wait till 2019 for Ice Lake to get 8 cores from Intel on a mainstream socket.

Even if 8C CL did make an appearance late next year, then Zen 2, on 7nm would be months away, and really that should be a big jump??
 

coercitiv

Diamond Member
Jan 24, 2014
6,633
14,075
136
But think about it: we used to have low profile DDR3 at 1.65v. Who needs tall heatsinks when the voltage now is 1.2-1.35v?
Voltage is down but operating frequency has gone up by more than 50%.

DDR-400 worked at 200Mhz, and so did DDR2-800 and DDR3-1600 and... so does DDR4-1600. But now DDR4-3200 works at 400Mhz, and newer kits are pushing over DDR4-4000 which is 500Mhz. The faster kits are going for 1.4V too.
 

Riot55

Junior Member
May 8, 2017
9
1
11
Posted this a couple pages back but didn't get a response, trying one more time if anybody knows I'd appreciate it!

New to overclocking so just want to make sure I'm not making a mistake...

I have a fixed voltage on my 8700k cpu of 1.32 which seems to be staying fine in HWInfo. My VID though reached a maximum of 1.434V. Is this okay? If I understand, VID is not an actual voltage being supplied, it's just what the CPU "requests" or thinks it wants? Just want to make sure my OC is going to remain safe.
 
Mar 10, 2006
11,715
2,012
126
I thought advising people to wait for the next year launch was something you were reluctant to do, since there's always something better on schedule for "next year", especially for enthusiasts such as AdamK47.

It seems like he's not entirely thrilled with what 8700K/current Z370 boards offer, so if he's hesitant about that platform, might as well wait a year for the Coffee Lake platform to improve, new boards to come out with potentially better memory support, and as an added bonus, he'll get a much better CPU.
 

rondocap

Member
Nov 6, 2017
30
4
16
Any suggestions on optimal speeds and temps I should go for with the below info?

8700k with Asus hero x and 3200mhz trident z on a h70 120mm aio with 2 push pull fans. (Biggest I can do in case)

Using all other der8auer settings, testing 26.6 prime 95 for 1-2 hours

I got 5ghz @ 1.375 stable, but 95-96c highest
I got 4.9ghz @ 1.3500 at 88c highest, 9 hour prime stable (not stable at 1.3, but will test between 1.3 and 1.35)

Also stock chip and stock Asus settings but with mce off, manual voltage to 1.25, got 72c

For stability, what should I be going for, and with enough performance gain?
 

coercitiv

Diamond Member
Jan 24, 2014
6,633
14,075
136
I have a fixed voltage on my 8700k cpu of 1.32 which seems to be staying fine in HWInfo. My VID though reached a maximum of 1.434V. Is this okay? If I understand, VID is not an actual voltage being supplied, it's just what the CPU "requests" or thinks it wants? Just want to make sure my OC is going to remain safe.
If you set a fixed voltage then VID no longer matters, check Vcore to see the actual voltage being suplied to the CPU. You should see VID jumping around depending on load while Vcore stays around 1.3-1.34V (value may change slightly depending on CPU load and your motherboard Load Line Calibration settings).

For stability, what should I be going for, and with enough performance gain?
Any overclock beyond 4.7-4.8Ghz is not for true performance gains, it is mainly for personal satisfaction.

If you want 5Ghz then find the stable voltage for that speed, then set an AVX offset of 200-400Mhz to make sure you won't hit thermal limits under specific loads, then enjoy your CPU.
 
Last edited:
Reactions: Campy

IndyColtsFan

Lifer
Sep 22, 2007
33,655
687
126
It seems like he's not entirely thrilled with what 8700K/current Z370 boards offer, so if he's hesitant about that platform, might as well wait a year for the Coffee Lake platform to improve, new boards to come out with potentially better memory support, and as an added bonus, he'll get a much better CPU.

Just an FYI - the Z370 Taichi currently supports up to DDR4-4333 and has a couple GSkill 4266 kits on the memory QVL. I thought Asus had some pretty good memory support too but I could be mistaken and I'm too lazy to look.

Personally, if I were Adam, I would hold off. He has a new, modern platform and can always ditch the 7740 for a 7820 and overclock the heck out of it. For me, I was on a 6 year-old system and after years of cancelling upgrades (Skylake, Broadwell-E, and then Skylake-X), I decided Coffee Lake was where I got onboard the upgrade express. I was super close to pulling the trigger on a 7820x and with some of the recent sales, I might have done that if I had it to do over again. However, I'm pretty confident I'll have a faster gaming machine with the 8700 for now.
 
Reactions: Arachnotronic

rondocap

Member
Nov 6, 2017
30
4
16
If you set a fixed voltage then VID no longer matters, check Vcore to see the actual voltage being suplied to the CPU. You should see VID jumping around depending on load while Vcore stays around 1.3-1.34V (value may change slightly depending on CPU load and your motherboard Load Line Calibration settings).


Any overclock beyond 4.7-4.8Ghz is not for true performance gains, it is mainly for personal satisfaction.

If you want 5Ghz then find the stable voltage for that speed, then set an AVX offset of 200-400Mhz to make sure you won't hit thermal limits under specific loads, then enjoy your CPU.


Thank you- what thermals should I use as guidelines, ie prime 95? Under 90c ok or is that still too high?
 

Campy

Senior member
Jun 25, 2010
785
171
116
I've been running 4133 at CAS 16 completely stable since July. I'm torn on getting an 8700K. Maybe I'll just wait for something better next year.

Which memory kit are you running and how much voltage did it need to get those speeds?
 

coercitiv

Diamond Member
Jan 24, 2014
6,633
14,075
136
I thought Asus had some pretty good memory support too but I could be mistaken and I'm too lazy to look.
RichUK is on Asus Hero X Z370.
Memory OC seems pretty decent:


The MSI Z370 Gaming Pro Carbon has 4000Mhz on QVL list, so does my board, the Z370M Gaming Pro.

Meanwhile... the Z370I Gaming Pro has 4600Mhz on QVL list. That board had a lot of memory OC potential from day one, though I don't know how well it can handle CPU OC.
 
Last edited:

coercitiv

Diamond Member
Jan 24, 2014
6,633
14,075
136
Thank you- what thermals should I use as guidelines, ie prime 95? Under 90c ok or is that still too high?
If you only use that prime 95 load to calibrate your overclock and your cooling, under 90C is ok. If you intend to run heavy continuous loads on that system under various room temperatures, then aim for 85C in prime 95. (assuming your current room temps are bellow your max possible values)

Either way after you decide on your OC settings you can just use HWiNFO to log temperatures while you use the computer and observe real usage temps over a couple of days. You'll likely notice you're not getting anywhere near 85C.
 

Ajay

Lifer
Jan 8, 2001
16,094
8,109
136
Wow...It looks like the 8700k is binning out pretty nicely. Silicon Lottery binning results and prices including deliding...

4.9 GHz @ 1.387v: 100% - $449
5.0 GHz @ 1.400v: 81% - $479
5.1 GHz @ 1.412v: 58% - $539
5.2 GHz @ 1.425v: 30% - $659
5.3 GHz @ 1.437v: 6% - $999

Bah, I was out last night and now OOS. Pricing is a bit high, but not surprising given the low supply.
 
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