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I7-6700K OC Custom Waterloop Heat Problems

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post #1 of 19 (permalink) Old 01-20-2020, 07:49 PM - Thread Starter
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I7-6700K OC Custom Waterloop Heat Problems

Hello, i recently built my first custom waterloop, its rigid tubing, using Phanteks Glacier C350I cpu waterblock and Glacier Waterblock for the Gpu.
My GPU temps even overclocked stay well under 50C on load using a GTX 1080TI and its all hooked up to 2 360mm Rads, so i know the the Distilled Water itself is staying very cool.

Before overclocking my cpu i ran prime 95 Small FFTs with AVX and AVX2 disabled to get a baseline.
My temps even then jump up to around 70C (I7-6700K i reseated it 3 times to make sure using Arctic Silver 5 Thermal Compound)
I got to 4.7Ghz pretty easily, i didnt do extensive testing, but i kept my voltage around 1.3V maybe a bit less with LLC on Turbo, auto, normal or High dont seem to be as stable.

Running prime or Aida64 i reach 95C sometimes, while these are very stressful tests, ive seen other OC's with the same chip on less cooling getting much cooler temps at even higher voltage.

I was wondering if anybody had any tips, my idle temps are in the low 30's and i made sure to remove the Plastic peel on the cpu waterblock.
I was thinking about delidding and using Thermal Grizzly Kryonaut to replace the TIM, idk if liquid metal would be a lot better or not, but im trying to spend the least i can haha.
The cpu waterblock is tightened down well, a bit past as far as you can tighten with just your hand, so it should have good contact.

All C-States are disabled, Eist is disabled, Voltage Opimization is ON, RSR is off, Intel Speedshift/step tech is off.
Also i believe 1.45 volts i have heard is the farthest you should really go for safe overclocking? just wanted peoples opinions here, obviously the lower i can keep it the better but if i fix the cooling problem, then i would like to push it farther!


Thanks in advance for your help!

Last edited by Enterprise12; 01-21-2020 at 03:59 PM.
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post #2 of 19 (permalink) Old 01-20-2020, 07:49 PM
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delid.

Intel i9 9900K Coffee Lake @ X8 5309mhz (+47.5%)
AMD FX-8320 Vishera @ X4 5022mhz (+43.5%)
Intel i5 4690K Haswell @ X4 5013mhz (+43.2%)
AMD X4 960T Zosma @ X6 4870mhz (+62.3%)
Intel i7 6700 Skylake @ X4 4709mhz (+38.5%)
Intel i5 6400 Skylake @ X4 4588mhz (+69.9%)
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post #3 of 19 (permalink) Old 01-21-2020, 08:44 PM - Thread Starter
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i ordered the things needed to delid, does anyone else have any other input? max safe voltage i can do?
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post #4 of 19 (permalink) Old 02-06-2020, 06:24 PM - Thread Starter
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Hey so i delidded and my temps dropped over 30C at load its insane!
Im currently at 4.9Ghz 1.45V pretty stable, i have perfect llc it never goes under or over 1.45v
I wanted to know is this a safe voltage? my temps stay just under 65-70C at load with prime 95, i also use Realbench and Aida64
my mobo is the MSI Z270 MGaming Titanium
I want to try to push for 5Ghz since my temps are very good, can i push it higher? thanks!
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post #5 of 19 (permalink) Old 02-06-2020, 06:52 PM
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yep, the temperature drops on Skylake and Kaby Lake are insane.

you're already above what most people would consider a safe 24/7 voltage for 14nm, most people say 1.4v. both my old i5 6400 and i7 6700 ran a bit higher than that without any issues and they're still kicking afaik.

if you'd be upset when it significantly degrades and/or dies then dial it back a touch but otherwise just leave it. they're not incredibly expensive to replace anymore but it's not free either.

Intel i9 9900K Coffee Lake @ X8 5309mhz (+47.5%)
AMD FX-8320 Vishera @ X4 5022mhz (+43.5%)
Intel i5 4690K Haswell @ X4 5013mhz (+43.2%)
AMD X4 960T Zosma @ X6 4870mhz (+62.3%)
Intel i7 6700 Skylake @ X4 4709mhz (+38.5%)
Intel i5 6400 Skylake @ X4 4588mhz (+69.9%)
2 OP pls nerf
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HP EX950 NVMe 2TB
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post #6 of 19 (permalink) Old 02-06-2020, 07:39 PM - Thread Starter
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Quote: Originally Posted by The Pook View Post
yep, the temperature drops on Skylake and Kaby Lake are insane.

you're already above what most people would consider a safe 24/7 voltage for 14nm, most people say 1.4v. both my old i5 6400 and i7 6700 ran a bit higher than that without any issues and they're still kicking afaik.

if you'd be upset when it significantly degrades and/or dies then dial it back a touch but otherwise just leave it. they're not incredibly expensive to replace anymore but it's not free either.
ok im going to go down to 4.8 as its a ton less voltage.
I wanted to try per core overclocking so i could have 2 cores reach 5ghz and others 4.8 but when i test this, they all go to 4.8 still occasionally they will do 5 for a second, am i doing something wrong, or is there a better way to test this?
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post #7 of 19 (permalink) Old 02-06-2020, 07:57 PM
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nope, it's working like it should. that's why nobody OCs per-core, unless you're basically completely idle sitting at the desktop you're never going to see the higher clocks.

Intel i9 9900K Coffee Lake @ X8 5309mhz (+47.5%)
AMD FX-8320 Vishera @ X4 5022mhz (+43.5%)
Intel i5 4690K Haswell @ X4 5013mhz (+43.2%)
AMD X4 960T Zosma @ X6 4870mhz (+62.3%)
Intel i7 6700 Skylake @ X4 4709mhz (+38.5%)
Intel i5 6400 Skylake @ X4 4588mhz (+69.9%)
2 OP pls nerf
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i9 9900K
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AsRock Z390 Taichi
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Mushkin Pilot NVMe 1TB
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HP EX950 NVMe 2TB
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Samsung 860 Evo 1TB
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Toshiba X300 5TB
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Seasonic Focus Plus Gold 750w
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Raijintek Morpheus II
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post #8 of 19 (permalink) Old 02-06-2020, 08:29 PM - Thread Starter
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Quote: Originally Posted by The Pook View Post
nope, it's working like it should. that's why nobody OCs per-core, unless you're basically completely idle sitting at the desktop you're never going to see the higher clocks.
alright, i seem to be stable at 4.8Ghz with a ring ratio of 4.3 at 1.45V staying under 70C!
Before i overclock my ram, i will use the system for awhile to make sure its stable, should i try using dynamic voltage etc now?
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post #9 of 19 (permalink) Old 02-06-2020, 08:48 PM
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use offset or fixed or dynamic or whatever you want, all that really matters is the end voltage the CPU gets. if your CPU is getting 1.40v then it doesn't matter how you got it to that point.

probably not fixed if you want to keep SpeedStep, go with offset or dynamic.

keep LLC on the least aggressive setting that reduces some/most vDroop without completely getting rid of it, that does matter.

Intel i9 9900K Coffee Lake @ X8 5309mhz (+47.5%)
AMD FX-8320 Vishera @ X4 5022mhz (+43.5%)
Intel i5 4690K Haswell @ X4 5013mhz (+43.2%)
AMD X4 960T Zosma @ X6 4870mhz (+62.3%)
Intel i7 6700 Skylake @ X4 4709mhz (+38.5%)
Intel i5 6400 Skylake @ X4 4588mhz (+69.9%)
2 OP pls nerf
(24 items)
NUC U
(10 items)
CPU
i9 9900K
Motherboard
AsRock Z390 Taichi
GPU
MSI GTX 1080 Ti
RAM
G.Skill DDR4 4133 32GB
Hard Drive
Mushkin Pilot NVMe 1TB
Hard Drive
HP EX950 NVMe 2TB
Hard Drive
Samsung 860 Evo 1TB
Hard Drive
Toshiba X300 5TB
Hard Drive
Western Digital EZRZ 3TB
Power Supply
Seasonic Focus Plus Gold 750w
Cooling
Corsair H115i Pro
Cooling
Raijintek Morpheus II
Case
Fractal Design Meshify S2
Operating System
Windows 10 Education x64
Monitor
Acer XF270HU 27" 1440p
Monitor
LG 24UD58 24" 4K
Keyboard
CoolerMaster MasterKeys Pro S
Mouse
Logitech G502
Mouse
Glorious Model D
Audio
Klipsch PowerGate + FiiO E10K
Audio
Micca RB42
Audio
Philips Fidelio X2
Audio
Philips SHP9500S
Audio
Audio Technica ATH-M50X
CPU
i3 8109U
Motherboard
Intel NUC8i3BEH
GPU
Iris Plus 655
RAM
Kingston 8GB DDR4 2400
Hard Drive
Dierka K1 120GB
Hard Drive
ADATA SU800 128GB M.2
Operating System
Windows 10 Professional
Operating System
MX Linux
Keyboard
Dierya DK63-BT 60% (Outemu Blue)
Mouse
Logitech G603 Wireless
CPU
i7 860
Motherboard
Advantech AIMB 280 ITX
GPU
EVGA GTX 950 2GB
RAM
Kingston 2GB DDR3 1333
Hard Drive
Seagate Momentus 2.5" 500GB
Hard Drive
Western Digital Blue 2.5" 320GB
Power Supply
Silverstone SFX-L Gold 500w
Cooling
Arctic Alpine 11 GT 2
Case
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post #10 of 19 (permalink) Old 02-07-2020, 07:55 AM
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that's amazing that you droped 30c!!!! congrats.. I build pcs for hobby iv built about a dozen pcs from 2016 - now with i7 6700k, i7 7700k, i7 8700k, and i9 9900k, every chip sat on a corsair aio and the first thing I did with the chips was delid and apply liquid metal... best thing to do especially everyone wants the psycologial number of 5GHZ, but yea amazing what you can do to improve temps of there new CPUS, the i9 9900k (latest one) is a little more tricky you cant just take a razer to it you need speical tool, then scrap off the solder (not intels bird crap) but yea I always use Cool Laboratory liquid pro as my compound.. ALSO, you can direct die mount the waterblock now with rocket cools 9th gen kit I bet they have one for the 6th and 7th and 8th gen when I went from delid w liquid metal to straight direct die I drops another 6-7C that's a lot!!!

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