Intel "Coffee Lake" Builders Thread

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fastamdman

Golden Member
Nov 18, 2011
1,335
70
91
Why is a 3200Mhz CL16 ram a worst ram possible?

Guys aren't we getting a little carried away here?
Well for the price I paid for it I could have gotten a much better set of ram. I could have gotten 3200mhz CL14 off newegg, or much higher frequencies at the same latency. All is well though, stuff happens. I will play with ram overclocking once I get a stable cpu overclock that I'm happy with.
 

Ferzerp

Diamond Member
Oct 12, 1999
6,438
107
106
Here it is at small FFT prime95 non-AVX it looks like 1.26Vcore:



Here is AVX:



I don't get the weird maximums that are in the 1.3x range since I never see the current value at that. Anyone know?

This is all with the automatic settings still (I just chose i7-8700k: 5.0 Ghz from a menu). When I have time , I'll mess with it and get lowest voltage stability and probably reduce temps a bit. The thing that bugs me is the CPU package power max of 183W (core power 172W) when doing the AVX test. That's an awful lot of power being used there...
 
Last edited:
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DrMrLordX

Lifer
Apr 27, 2000
21,813
11,167
136
Downloaded that software and it said they are hynix chips. I guess I bought the worst ram possible, what a waste of money lol. Maybe I can get lucky with a decent overclock though. Stupid me and stupid wife for rushing lol.

It isn't the worst possible. You have what is the highest bin available of Hynix DDR4. Yes, you could have gotten b-die, but it isn't always easy to figure out what is or isn't b-die. I had to do a lot of research to figure it out when pre-buying RAM for my Ryzen system.

That being said, I do not think you will get much more clockspeed than the stock DDR4-3200. You might be able to tighten timings. Also keep in mind that you are not restricted by anything arcane like AMD's Infinity Fabric (1/2 of DRAM equivalent speed), so you can do just as well from improving latency as you can from improving clockspeed. Reducing timings (notably CL/CAS) by 1 will have about the same effect as increasing clockspeed by ~266 MHz equivalent while maintaining identical timings. So you should be shooting for DDR4-3200 CL/CAS 14 or lower, depending on what you can get.

I do not know how well Hynix ICs take to vDIMM above 1.35v . Samsung b-die holds up pretty well on up to 1.45v (ymmv, caveat emptor, etc). Not sure about other stuff.
 
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StinkyPinky

Diamond Member
Jul 6, 2002
6,832
880
126
How far are you gong to overclock it? Just a MCE overclock? That setup could hit 5.1 I'm sure of it, maybe even 5.2?
 

Ferzerp

Diamond Member
Oct 12, 1999
6,438
107
106
I’m not sure yet. For now I need to do serious stability testing. It’s been perfectly fine for games and such. I think I’ve got the gpu dialed in at 2050 MHz core and 5950 MHz memory. I put the msi water cooled bios on it which is a dual 8 pin bios instead of the originally hybrid cooled 8+6. The new bios allows up to 330W, but the spec on my connections is only 300W. I can go up to 310W without it crashing, but it can’t take more than that. It seems I have a middling GPU. Now that I’ve unlocked the voltage and allowed more power it reaches up to 37C (about 5C more than before). It unfortunately has a bit of a cool whine now, but not much I can do about that other than clock it down some.


As far as the cpu, I need to sit down and learn the Gigabyte bios. I always used Asus boards in the past so the different option set isn’t familiar yet. I will potentially push it up higher once I am more familiar.

The memory is the Corsair dominator 3200Mhz CL 16 set. I’m running it on its XMP profile right now. I’ll eventually push it too.

I like the water cooling. It keeps things a pretty low noise.
 
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fastamdman

Golden Member
Nov 18, 2011
1,335
70
91
Nice setup ferzerp! Really clean build, you would probably laugh if you saw my setup right now.

On the bright side guys, I finally figured out why temps were high and what was going on. Apparently Asus is having some issues with there boards. There are a few settings that you have to change in order for voltages to not go through the roof. Even when I was using adaptive voltage at say 1.3 with + .005, I was seeing 1.42 volts in prime 95 or Linx. Now I have it setup where volts are staying between 1.28 and 1.32 give or take. This is a hell of a lot better than me setting it for 1.3 and seeing spikes of 1.42 and huge temps. I found a really good redit thread for asus users about all the settings. Once I finish up some more thorough testing I will post up everything I found.

I was having issues where AVX was stable but cinebench would crash for example. I am re-doing all of my over clocking currently now that I figured out asus is having voltage issues. I'm sure a new bios will fix this eventually. Regardless, I am at 48x with no avx offset and it's running great. Seems to be completely stable with temps maxing out at low to mid 70s depending on the core. Remember I am not on a delidded chip and I am using just a crappy nzxt x61 aio as well so my temps will never be amazing lol. I would venture to guess that this is 100% rock stable where I am at right now, but I am almost positive I can get the voltage lower, it was just a starting point. I'm going to try to get 49 and 50x stable without any avx offset, if I can't, I will toss an offset on. I very well might have a decent chip after all.
 

TahoeDust

Senior member
Nov 29, 2011
557
404
136
The memory is the Corsair dominator 3200Mhz CL 16 set. I’m running it on its XMP profile right now. I’ll eventually push it too.
I had some Corsair 3200 CL16, it did not overclock for crap. Turns out it is Hynix not Samsung B-Die. I hope you have better luck than I did.
 

fastamdman

Golden Member
Nov 18, 2011
1,335
70
91
I am as well unfortunately. I will be thoroughly testing it out once I get my overclock on my cpu dialed in. Luckily if this chip isn't above average, I have another one coming in tomorrow xD
 

StinkyPinky

Diamond Member
Jul 6, 2002
6,832
880
126
I’m not sure yet. For now I need to do serious stability testing. It’s been perfectly fine for games and such. I think I’ve got the gpu dialed in at 2050 MHz core and 5950 MHz memory. I put the msi water cooled bios on it which is a dual 8 pin bios instead of the originally hybrid cooled 8+6. The new bios allows up to 330W, but the spec on my connections is only 300W. I can go up to 310W without it crashing, but it can’t take more than that. It seems I have a middling GPU. Now that I’ve unlocked the voltage and allowed more power it reaches up to 37C (about 5C more than before). It unfortunately has a bit of a cool whine now, but not much I can do about that other than clock it down some.


As far as the cpu, I need to sit down and learn the Gigabyte bios. I always used Asus boards in the past so the different option set isn’t familiar yet. I will potentially push it up higher once I am more familiar.

The memory is the Corsair dominator 3200Mhz CL 16 set. I’m running it on its XMP profile right now. I’ll eventually push it too.

I like the water cooling. It keeps things a pretty low noise.

Nice man. Yeah this is my first time with water cooling and I'm definitely a convert.
 

JoeRambo

Golden Member
Jun 13, 2013
1,814
2,105
136
Default 3.7ghz uncore default clocks is not good place to be, You are leaving quite some perf on the table, I'd run 4.4-4.5Ghz uncore clock for better L3 cache / RAM latency.
 

Ajay

Lifer
Jan 8, 2001
16,094
8,106
136
Silicon Lottery must have sold out of the 8700K fast, next target is Nov 11th.
I didn't even see the different bins listed earlier this morning
 
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Ferzerp

Diamond Member
Oct 12, 1999
6,438
107
106
I am as well unfortunately. I will be thoroughly testing it out once I get my overclock on my cpu dialed in. Luckily if this chip isn't above average, I have another one coming in tomorrow xD

I do have a bad bias against Hynix just due to an incident with work years ago. Back in '11 or '12, I deployed a 6 host VMware cluster, and of the 6 hosts, I had memory issues with all 6. Dell ended up sending out a tray and a half of new DIMMs (I made them replace all the memory in them). I know it can happen with any manufacturer, but I've never had such a bad batch of hardware come in. Never before, and never since.
 

Aikouka

Lifer
Nov 27, 2001
30,383
912
126
Corsair CMPSU-750TX, purchased in 2009, no issues so far

Your video card would largely be your biggest consumer of power; however, if you're not doing SLI or Crossfire of high-end cards, you should be fine with 750W. I don't see you going over 50-60% usage in most cases.

Nice man. Yeah this is my first time with water cooling and I'm definitely a convert.

Custom water cooling loops are definitely nice in regard to noise and thermals, but suffer a bit from high cost and time. One thing that frustrated me the most is that you usually can't do anything quickly anymore in your system. Swapping a video card goes from being a quick, five minute job to potentially a half hour at best. This isn't a horrible thing, but it can be annoying. Also, cases seem to be designed and maybe some radiators, but pumps have largely been an issue for me. I first used a Corsair 800D, which was fine, but it just didn't have good room for radiators. I swapped to the Corsair 900D, which had tons of radiator space, but it has nowhere to put the pump! (I also built a custom setup for mounting the reservoir that didn't involve drilling into the case.) Thankfully, companies like EKWB have fan-based mounts, which help alleviate that issue.

I'll admit that I was tempted to go with water again, and fortunately, I do have some of the components (pumps, reservoirs, etc.) left over, but I'd still spend a few hundred on blocks and radiators. To note, I also didn't really use quick disconnects in my previous systems. Using those can help alleviate excessive time due to allowing parts to be removed separately without a full loop flush.
 

Ferzerp

Diamond Member
Oct 12, 1999
6,438
107
106
That's why I went with a Thermaltake the Tower 900. Plenty of room for whatever you may want to do.
 
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TahoeDust

Senior member
Nov 29, 2011
557
404
136
Silicon Lottery must have sold out of the 8700K fast, next target is Nov 11th.
I didn't even see the different bins listed earlier this morning
I'm pretty sure that Nov 11th is their first batch of 8700Ks.
 
Oct 19, 2007
82
28
101
Your video card would largely be your biggest consumer of power; however, if you're not doing SLI or Crossfire of high-end cards, you should be fine with 750W. I don't see you going over 50-60% usage in most cases.

Thanks Aikouka. Any concerns with it being 8 years old? I've never had one so long, in the past I replaced PSU's because I needed more power. Power requirements have leveled off.
 

fastamdman

Golden Member
Nov 18, 2011
1,335
70
91
Your video card would largely be your biggest consumer of power; however, if you're not doing SLI or Crossfire of high-end cards, you should be fine with 750W. I don't see you going over 50-60% usage in most cases.



Custom water cooling loops are definitely nice in regard to noise and thermals, but suffer a bit from high cost and time. One thing that frustrated me the most is that you usually can't do anything quickly anymore in your system. Swapping a video card goes from being a quick, five minute job to potentially a half hour at best. This isn't a horrible thing, but it can be annoying. Also, cases seem to be designed and maybe some radiators, but pumps have largely been an issue for me. I first used a Corsair 800D, which was fine, but it just didn't have good room for radiators. I swapped to the Corsair 900D, which had tons of radiator space, but it has nowhere to put the pump! (I also built a custom setup for mounting the reservoir that didn't involve drilling into the case.) Thankfully, companies like EKWB have fan-based mounts, which help alleviate that issue.

I'll admit that I was tempted to go with water again, and fortunately, I do have some of the components (pumps, reservoirs, etc.) left over, but I'd still spend a few hundred on blocks and radiators. To note, I also didn't really use quick disconnects in my previous systems. Using those can help alleviate excessive time due to allowing parts to be removed separately without a full loop flush.

We are in the same boat kind of. I have the corsair 900D as well and planned on doing a custom loop but ended up grabbing an AIO to get my system up and running immediately. Never ended up getting the custom loop parts, but eventually I am sure I will. The AIO has been doing well for me though for a long time now. The 900D just looks so empty without custom water cooling lol. But it's so big that it makes installing and uninstalling parts extremely easy, I love the case.

On a side note and back on topic now. I get to pick up my other 8700k today. Pretty excited to see how well this one does.
 

Aikouka

Lifer
Nov 27, 2001
30,383
912
126
That's why I went with a Thermaltake the Tower 900. Plenty of room for whatever you may want to do.

I did take a peek at that case for Watercooling. It certainly looked interesting, but since I was leaning more toward air, I went with the Thermaltake Core X9. It isn't as designed specifically for watercooling as the Tower, but it does have plenty of room for radiators. It can fit two 480mm rads on top and in a few more spots. The only problem is the Core X9 is 25" deep, and the thing my computer sits on is only about 19" deep. So, I had to pull the top off and use it as a template for drilling holes to create a newer top.

We are in the same boat kind of. I have the corsair 900D as well and planned on doing a custom loop but ended up grabbing an AIO to get my system up and running immediately.

Oh, I don't actually use the 900D anymore. After I stopped doing water cooling, the case ended up being a bit too much due to the poor airflow characteristics. I'm actually a little worried that the X9 might be the same, which is why I use two fans on the top to provide air to the video card's AIO cooler and the Noctua air cooler. (One fan is on each side.) I'm also trying to find a way to make sure air is directed over the hard drives, but unlike most cases, there isn't a fan directly in front of the 3.5" drive cage.

Here’s a picture of that two fan setup from the top.
https://i.imgur.com/ZCn90bA.jpg
 

fastamdman

Golden Member
Nov 18, 2011
1,335
70
91
Everyone would probably want to murder me if they saw the way I decided to handle the (not having enough airflow) problem in the 900D lol. In other news, just got my hands on my second 8700K tonight. I will take some pictures during install this time and post up more results on the OC for it as well I really hope this one clocks even better than the other one!!
 

justoh

Diamond Member
Jun 11, 2013
3,686
81
91
Hero @ $370 or prime A @ $190? Picked up prime yesterday but having fourth thoughts. Haven't built yet. No obvious features I want, but maybe there are some non obvious ones? To go along with 8700k, trident z 3200, and kraken x62. $370 seems outrageous. What's that, a dollar to chipset number conversion? The strix gaming mobos are around $250.

Anyway, prime fine? Return and get hero?
 

VirtualLarry

No Lifer
Aug 25, 2001
56,452
10,120
126
What's the best (cheap) CFL 6-core CPU and board that I can get away with, possibly for a friend.

Thinking i5-8400 (that's a 6C/6T locked CPU, right?), and a cheap Gigabyte / Asus / ASRock Z370 ATX board.

Yeah, still selling my i3-8100 and ASRock ITX board, this build would be for a friend.
 
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