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Intel "Coffee Lake" Builders Thread

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psolord said:
A little higher image resolution please.

1.18 for 4.9Ghz is crazy. Is that a 8700k or a 8600k?

I have stopped at +50mV, level 1, for my 8600k@5Ghz. My gaming benchmarking temps are excellent, so no need for more fine tuning for now.
Click to expand...
Why do you use a positive offset? That goes against the grain.
 
Worked on a wishlist on Newegg today and when I started the 8700K was available. By the time I finished my list it was sold out. Oh well, I wasn't going to order today anyways.

I have decided on a CPU and want to use Optane SSD 900P, but keep going back and forth on motherboards. I have used Asus many times, but Gigabyte are good too. Here is my list. You will notice there are two motherboards there an no CPU cooler. List isn't final yet. Looking at about $2700 total build with today's prices.

I have several 4TB harddrives that will be swapped in and out of the hot swap as I need them. (video editing etc...)



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kirkdickinson said:
No water cooler?
Click to expand...

Personal preference is involved to some extent. I generally prefer to go with air cooling whenever possible, but if I go with water I tend to build full custom loops. The latter would have the best performance, of course.

Since you appear to be building a rig for work, I would think that reliability would be paramount. At stock speeds even the air cooler I linked is more than enough for adequate cooling of an i7-8700K. Even with a mild OC (e.g. MCE enabled to hit 4.7GHz all cores).

If you are overclocking, you may consider better cooling options. A high end air cooler will match or beat most <=240mm AIOs while costing less, so there is also that consideration. The case you have selected doesn't appear to support radiators >240mm so the suggestion of a larger AIO would either require modifications to the case or a different case altogether.
 
stockwiz said:
I used a multimeter this morning. It shows 1.225 volts when running Realbench at 4.9 GHZ so I edited my post. Still not bad.

I may keep it here, I may go to 5.0. I want this thing to last 5+ years.

Moral of the story: If you don't have a multi-meter, you don't have a real reading.

Nice jump from a 2600K running 4.5. That one's going to my nephew for Christmas.
Click to expand...

Cpuz shows 1.354V and the multimeter 1.225V? Why such big difference? :S

CPUz shows 1.312-1.328 for my 8600k but I never use overclocking 24/7.
 
Im getting a really weird thing happening with my GPU, it will go to 100% fans and then the screen will go black. I have not overclocked it, it's a 1080ti founders edition.

I have been overclocking my 8700k, and stress testing via prime 95/asus real bench - is it possible that caused something to the GPU or power supply? 850w evga supply, so should be sufficient.
 
Zucker2k said:
Why do you use a positive offset? That goes against the grain.
Click to expand...

I didn't know the "goes against the grain" expression. I learned something today. Thanks.

So hopefully I will learn something more. So...what do you mean?

Aren't we supposed to use a positive offset in order to increase voltage since we overclock?

I just saw what the built in preset of the BIOS was using, which was +100mV and I have gradually tuned it down to +50mV.

CPUz reads 1.312-1.328V at 5GHz now. From what I read this is an acceptable voltage for 5Ghz on the 8600k, is it not?
 
rondocap said:
Im getting a really weird thing happening with my GPU, it will go to 100% fans and then the screen will go black. I have not overclocked it, it's a 1080ti founders edition.

I have been overclocking my 8700k, and stress testing via prime 95/asus real bench - is it possible that caused something to the GPU or power supply? 850w evga supply, so should be sufficient.
Click to expand...
Sounds like overheating. I'd check the heatsink on the gpu first.
 
psolord said:
I didn't know the "goes against the grain" expression. I learned something today. Thanks.

So hopefully I will learn something more. So...what do you mean?

Aren't we supposed to use a positive offset in order to increase voltage since we overclock?

I just saw what the built in preset of the BIOS was using, which was +100mV and I have gradually tuned it down to +50mV.

CPUz reads 1.312-1.328V at 5GHz now. From what I read this is an acceptable voltage for 5Ghz on the 8600k, is it not?
Click to expand...
Those volts are very good for 5GHz, and you may leave them as is. If you type "goes against the grain" in google, you'll get the meaning.
 
Zucker2k said:
Those volts are very good for 5GHz, and you may leave them as is. If you type "goes against the grain" in google, you'll get the meaning.
Click to expand...

For now I'll leave them as they are, since they are OK.

By your expression, I figured that me using a positive offset, was doing the opposite from what others were doing. At least that's what google found out. Against the grain means doing the opposite.

So aren't others using a positive offset? That's what got me confused. 😛
 
I still have to pull the trigger on RAM for my build, I was disappointed by the selection at my local Microcenter.

Is the general consensus that the sweet spot is low latency (CAS 14) PC-3200? I recall seeing that in a review somewhere (can’t recall the site, it’s probably posted several pages back in this very thread!). I’m looking at some G.Skill sticks right now that fit that bill nicely, although they’re not cheap at $279.

Edit: These will be used for overclocking an 8700K on a Maximus X.
 
Last edited:
thxdd said:
I still have to pull the trigger on RAM for my build, I was disappointed by the selection at my local Microcenter.

Is the general consensus that the sweet spot is low latency (CAS 14) PC-3200? I recall seeing that in a review somewhere (can’t recall the site, it’s probably posted several pages back in this very thread!). I’m looking at some G.Skill sticks right now that fit that bill nicely, although they’re not cheap at $279.

Edit: These will be used for overclocking an 8700K on a Maximus X.
Click to expand...

Yes I also went with DDR4-3200 CAS 14 based off of the review that showed very little gain from faster/more expensive memory. In the wish list above I would choose "slower" DDR4-3200 CAS 14 and spend that savings on a GTX 1080 instead...
 
Thanks n00ky, already got the 1080 carrying over from my previous build. Can't justify the 1080ti upgrade since I'm only at 1440p.
 
Zucker2k said:
Sounds like overheating. I'd check the heatsink on the gpu first.
Click to expand...

I think I figured it out, I unplugged the power pcie cables from the gpu, and plugged them back in -I think it may have come loose from some other previous case changes in the vicinity this week.
 
IEC said:
Personal preference is involved to some extent. I generally prefer to go with air cooling whenever possible, but if I go with water I tend to build full custom loops. The latter would have the best performance, of course.

Since you appear to be building a rig for work, I would think that reliability would be paramount. At stock speeds even the air cooler I linked is more than enough for adequate cooling of an i7-8700K. Even with a mild OC (e.g. MCE enabled to hit 4.7GHz all cores).

If you are overclocking, you may consider better cooling options. A high end air cooler will match or beat most <=240mm AIOs while costing less, so there is also that consideration. The case you have selected doesn't appear to support radiators >240mm so the suggestion of a larger AIO would either require modifications to the case or a different case altogether.
Click to expand...

Yes I'm trying to build a rig for work Photoshop, video editing, etc. Never been big into overclocking. Had a Citrix chip way back in the mid 90's that I overclocked. Had a friend that was into gaming and tweaking the clock speed. I liked how well his gaming computer ran so built one with the same motherboard and CPU as his.

Speed is very important to me but I do not want to risk reliability. If the computer gets unstable and crashes during the long render, or a complex Photoshop operation, then all the speed is worthless. And I really don't feel like doing a bunch of custom water cooling to get overclocking. I have a water CPU cooler in my rig that I am running right now. (I7-3930K) At the time I bought that CPU that cooler was the only option. Intel liquid cooled thermal protection for LGA 2011.

I can happily run an air cooler if that is adequate for this system.

Any opinion which of those motherboards would be better?

Does anybody on this thread have the 8700K with the Optane SSD 900P? Curious if that is as fast at it seems it would be?
 
Last edited:
kirkdickinson said:
Yes I'm trying to build a rig for work Photoshop, video editing, etc. Never been big into overclocking. Had a Citrix chip way back in the mid 90's that I overclocked. Had a friend that was into gaming and tweaking the clock speed. I liked how well his gaming computer ran so built one with the same motherboard and CPU as his.

Speed is very important to me but I do not want to risk reliability. If the computer gets unstable and crashes during the long render, or a complex Photoshop operation, then all the speed is worthless. And I really don't feel like doing a bunch of custom water cooling to get overclocking. I have a water CPU cooler in my rig that I am running right now. (I7-3930K) At the time I bought that CPU that cooler was the only option. Intel liquid cooled thermal protection for LGA 2011.

I can happily run an air cooler if that is adequate for this system.

Any opinion which of those motherboards would be better?

Does anybody on this thread have the 8700K with the Optane SSD 900P? Curious if that is as fast at it seems it would be?
Click to expand...

Mid to high end air is fine with stock 8700k settings and even MCE. I'm running all core turbo at 4.7ghz with a U14S and it's working great. Really, unless you're pushing 4.9ghz+ air is great and if you want to go faster it's time for a delid and possibly even custom water.
 
ozzy702 said:
Mid to high end air is fine with stock 8700k settings and even MCE. I'm running all core turbo at 4.7ghz with a U14S and it's working great. Really, unless you're pushing 4.9ghz+ air is great and if you want to go faster it's time for a delid and possibly even custom water.
Click to expand...

Depends on the chip as well. I'm at 1.36v for 5ghz completely stable. I can go up to 5.4ghz and my other processor can do 5.3, but it takes a lot of voltage to get them stable at those levels. Delidding and an AIO really helps though. I can't wait to get the delid die mate 2 in so I can delid this 8700k and start to have some real fun. Gonna crank the voltage up as high as I need to in order to get 5.5ghz stable for benchmarking lol.
 
psolord said:
For now I'll leave them as they are, since they are OK.

By your expression, I figured that me using a positive offset, was doing the opposite from what others were doing. At least that's what google found out. Against the grain means doing the opposite.

So aren't others using a positive offset? That's what got me confused. 😛
Click to expand...
You are. The normal routine is to set say 1.330v for your 5GHz overclock and then use the (negative) offset to cut down on the volts until you start experiencing instability, then you up it a notch to stay stable. But you set a lower vcore and increased it with a positive offset. Both work to get you to your desired goal which is why I said you could leave it as is, especially since your overclock is really good for that voltage.
 
kirkdickinson said:
Worked on a wishlist on Newegg today and when I started the 8700K was available. By the time I finished my list it was sold out. Oh well, I wasn't going to order today anyways.

I have decided on a CPU and want to use Optane SSD 900P, but keep going back and forth on motherboards. I have used Asus many times, but Gigabyte are good too. Here is my list. You will notice there are two motherboards there an no CPU cooler. List isn't final yet. Looking at about $2700 total build with today's prices.

I have several 4TB harddrives that will be swapped in and out of the hot swap as I need them. (video editing etc...)



(3)
StarTech HSB4SATSASBA 4 Bay Aluminum Trayless Hot Swap Mobile Rack Backplane for 3.5in SAS II/SATA III - 6 Gbps HDD


  • $87.08
  • Free Shipping
Click to expand...
What I got for that purpose is this (usb 3.1 gen 2):
https://www.amazon.com/gp/product/B01E80N2E8/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

the optane drive I wanted to try but availability was scarce and price above retail, so I went with a 960 pro which is great, though I may get the 280 gb optane later.
 
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