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ColeLT1
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Skylake i5 6600k and i7 6700k overclock

Fri Oct 09, 2015 8:33 am

i5 6600k
Asus Maximus VIII Ranger Z170
G.Skill DDR4 3000 F4-3000C15D-8GVR
Coolermaster Hyper 212 Evo
Nvidia GT 430 (temporary card, to make sure onchip does not throw off OC)
Bench setup, not in a case

See post 7 for the i7 overclock

--------
I'm building 2 i5 6600k's. This is my first one, the other should be in a month or so. I was going to build a i7 6700k for myself, but I killed the chip trying to naked mount it, I think the PCB is too thin and it flexed, breaking some bumps or something. EK's website and facebook both stated their kit would support the 6 series, then edited their pages to say nevermind. Even with the cap on, it is dead, tried in 2 boards, so I naked mounted my 4790k and will keep it another year, it did drop my temps 10c vs the delid, clean up, re-lid method. I'm not salty over this (besides the editing of their "support" of the chip), in my 20yrs of building PCs I have now killed 1 chip, and 1 board (replacing a DFI-SLI NF4 chipset fan), so I am ok with that track record. I was upgrading a friend from a C2Q, was going to sell him my 4790k/board/ram, bought a 6600k instead and he gets my new board/ram.
4790k naked mount:
http://imgur.com/i1KZM2I
Dead 6700k:
http://imgur.com/aP88d94
-------

On to the meat of this post:

I am very surprised how cool this chip ran, temps were not a factor, I hit a wall at 4.9ghz (with 1.4v or 90c being the max I want to run). In hindsight, I could have maxed out the 6700k without deliding.

I set him up 3 profiles
-Stock clock
-4.6ghz @ 1.385v (normal use)
-4.7ghz @ 1.400v (benchmarks or the "look at me" clock)

I didn't take a shot of 24hrs but here is a shot just so you can see it is stable and how low the Linpack temps are:
http://imgur.com/G9fj7u8
Pic of setup:
http://imgur.com/KzgXkDF

i5 6600k [email protected] Asus Maximus VIII Ranger Coolermaster212Evo
Stock clock (3.9ghz) 1.104vCPZ
max w/intel 4790k stock cooler w/the stock 3 strips of goo 82-79-76-77
max w/212evo 38-37-34-36 (wow, huge difference)

Cache set to 3.9ghz

+.001 adaptive core voltage 1.125vCPUZ
4.2ghz = 41-40-38-40
4.3ghz = 45-43-40-43
4.4ghz = crash on boot

+.100 adaptive core voltage 1.210vCPUZ
4.4ghz = 53-49-46-49
4.5ghz = 52-51-48-51
4.6ghz = crash on boot

+.200 adaptive core voltage 1.315vCPUZ
4.6ghz = 64-62-56-60
4.7ghz = 65-61-57-62
4.8ghz = 1min crash

+.250 adaptive core voltage 1.365vCPUZ
4.8ghz = 70-66-60-67
4.9ghz = crash on boot

+.300 adaptive core voltage 1.415vCPUZ
4.9ghz = 1min crash

END CORE TESTING
------------------------------------------
START FINAL W/CACHE

4.8ghz-Core 4.8ghz-Cache
+.250v = crash on boot
+.260v = crash on boot
+.270v = crash on boot
+.280v = 1min crash

+.250v 1.365vCPUZ 4.8ghz-core
4.8cache = crash on boot
4.7cache = 1min crash
4.6cache = 72-67-61-68 8min error
4.5cache = 1min crash
4.4cache = 1min crash

+.275v 1.390vCPUZ 4.8ghz-core
4.8cache = 1min crash
4.7cache = 76-72-65-71 21min fail
4.6cache = 74-70-65-71 12min fail
4.5cache = 74-75-66-72 8min fail
Set System Agent and VCCIO to 1.23750v
4.5cache = 8min fail

4.7ghz-core 4.7ghz-cache
+.275v 1.390vCPUZ = 73-71-65-70 1hr stable
+.200v 1.315vCPUZ = crash on boot
+.220v 1.335vCPUZ = 1min crash
+.230v 1.345vCPUZ = 1min crash
+.240v 1.355vCPUZ = 70-66-61-66 15min crash
+.250v 1.365vCPUZ = 72-70-63-68 4hr crash
+.260v 1.375vCPUZ = 75-74-65-71 7hr crash
+.270v 1.385vCPUZ = 74-76-66-72 11hr occt error
+.285v 1.400vCPUZ = 76-75-68-75 24hr stable

Profiles

4.7ghz-core 4.7ghz-cache +.285v
4.6ghz-core 4.6ghz-cache +.270v
Last edited by ColeLT1 on Thu Nov 19, 2015 11:12 am, edited 1 time in total.
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vargis14
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Re: Skylake i5 6600k overclock

Fri Oct 09, 2015 9:38 am

if you are getting those temps with a hyper 212 then a $89 Cooler Master nepton 140xl will work a lot better, with mine the load temps of 60-65c drop to my idle temps of 28c almost instantly at 24c ambient where air coolers tend to take a good bit longer more time to drop to idle temps.
Let alone your load temps will be much lower...the 140xl is a beast with its push pull high static pressure jetflow fans. Some say they are loud and you start to hear them over 55% speed but at 50% they are pretty silent but at 100% they are really loud. Luckily most new motherboards control fan speed great but I have been using Speedfan since it serves more purposes than just controlling the fan speed, it gives me each cores usage including the HT threads and temps on all 4 of my old 2600k core temps along with chipsets and HDD's.

Here is a great article comparing AIO systems including the 140xl its performance says it all for a 140mm unit beating 240mm units.
http://www.anandtech.com/show/7738/clos ... id-coolers
2600k@4848mhz @1.4v CM Nepton40XL 16gb Ram 2x EVGA GTX770 4gb Classified cards in SLI@1280mhz Stock boost on a GAP67-UD4-B3, SBlaster Z powered by TX-850 PSU pushing a 34" LG 21/9 3440-1440 IPS panel. Pieced together 2.1 sound system
 
ColeLT1
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Re: Skylake i5 6600k overclock

Fri Oct 09, 2015 9:55 am

vargis14 wrote:
if you are getting those temps with a hyper 212 then a $89 Cooler Master nepton 140xl will work a lot better, with mine the load temps of 60-65c drop to my idle temps of 28c almost instantly at 24c ambient where air coolers tend to take a good bit longer more time to drop to idle temps.
Let alone your load temps will be much lower...the 140xl is a beast with its push pull high static pressure jetflow fans. Some say they are loud and you start to hear them over 55% speed but at 50% they are pretty silent but at 100% they are really loud. Luckily most new motherboards control fan speed great but I have been using Speedfan since it serves more purposes than just controlling the fan speed, it gives me each cores usage including the HT threads and temps on all 4 of my old 2600k core temps along with chipsets and HDD's.

Here is a great article comparing AIO systems including the 140xl its performance says it all for a 140mm unit beating 240mm units.
http://www.anandtech.com/show/7738/clos ... id-coolers


The temps are great though, never even got in the 80s on linpack, and I don't really care for AIO systems except for small cases. This is going in a 650d, so plenty of cool air. Idles in the low20s. Either way, I personally run custom waterloops, but this is for my best friend's stepson and was a budget build :P I sold him this setup for loss, I promised him my 4790k+ram+board for $450, he paid me $450 and I ended up keeping my 4790k. He has been cutting grass and saving allowances for a long time for a decent build, and I am not hurting for money.
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bintsmok
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Re: Skylake i5 6600k overclock

Sun Nov 08, 2015 12:44 am

Use x264 Stability Test v2 for overclock stability check. It doesn't create unnecessary excessive heat but very good in detecting instability.

Sorry, still new to the forum so I can't post links. Just search the "Skylake Overclocking Guide" thread at OverClock.net. The download link is there
 
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Re: Skylake i5 6600k overclock

Mon Nov 09, 2015 5:53 am

Nice overclock, i didn't knew Skylake could OC this high.

I would suggest you encode a movie to check the stability of your OCed system, Encoding task will give you realistic picture.

I am using i5 4670K which is set at 4.8GHZ as daily driver but i am working on making this chip work at 5GHZ. Its not 100% stable at 5GHZ - crashes after 1 hour of encoding task.

Image
Image
 
ColeLT1
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Re: Skylake i5 6600k overclock

Mon Nov 09, 2015 9:16 am

Thanks guys, I will use the x264 test (already downloaded it to my server) from here on out.
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ColeLT1
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Re: Skylake i5 6600k and i7 6700k overclock

Thu Nov 19, 2015 12:01 pm

i7 6700k
Asus Maximus VIII Ranger Z170
64GB RAM 2x G.Skill DDR4 3000 F4-2666C15D-32GVR (For EastWest Quantum leap)
Coolermaster Hyper 212 Evo
Onchip video
512GB Samsung 950pro M.2 (OS and program files)
2TB Samsung 850 Pro SATA (for plugins)
4TB WD RED for main storage
He also has a ESATA/USB NAS for slow storage

Now testing with x264 Stability test v2.06

Bench setup, not in a case yet. This computer will be running a co-worker's home music studio (replacing a P4 based xeon HP rack server setup). He is going from cubase to presonus studio one 3.

Chip will do 4.8ghz @ 1.418v but that is too high for my liking. Currently it is at 4.7 @ 1.399v (+1.60v adaptive). Going to get it really stable at 4.7, then drop the speed to 4.6ghz. I will post the final numbers once I have them.

Image
Image
Image
Image
Image
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continuum
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Re: Skylake i5 6600k and i7 6700k overclock

Thu Nov 19, 2015 1:53 pm

I'm now seriously itching to start a Skylake build... must resist...
 
ColeLT1
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Re: Skylake i5 6600k and i7 6700k overclock

Thu Nov 19, 2015 2:35 pm

Side note, the 950 pro is in the M2 slot, shows up in disk management and all, but I am using a old SSD to do the overclocking. This thing runs as hot as everyone says, I cannot put my finger and hold on the controller, where it says "950" on the sticker, for longer than 5 seconds (and this is at idle). I'll be gluing a small vram heatsink to it soon, and I will download SSD magician and see if it shows temps, then give a before and after.
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Firestarter
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Re: Skylake i5 6600k overclock

Fri Nov 20, 2015 2:32 am

bintsmok wrote:
Use x264 Stability Test v2 for overclock stability check. It doesn't create unnecessary excessive heat

you're not one of those "power virus" guys are you
 
ColeLT1
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Re: Skylake i5 6600k and i7 6700k overclock

Fri Nov 20, 2015 2:28 pm

i5 6700k [email protected] Asus Maximus VIII Ranger Coolermaster212Evo
Using x264 Stability test v2.06

XMP/Auto clock/auto voltage (4.2ghz) 1.335vCPZ (why so high?)
max 69-71-63-69
4.2ghz (cache matched) / +.001 adaptive core voltage 1.232vCPUZ (much better)
max 58-59-53-58

+.001 adaptive core voltage 1.232vCPUZ
4.2ghz = 59-61-55-60
4.3ghz = 57-59-53-57 (tuned fan profile)
4.4ghz = lock on test

+.050 adaptive core voltage 1.289vCPUZ
4.4ghz = 65-67-60-65
4.5ghz = 64-66-59-63
4.6ghz = lock on boot

+.100 adaptive core voltage 1.339vCPUZ
4.6ghz = lock on loop 4

+.150 adaptive core voltage 1.389vCPUZ
4.7ghz = 79-81-73-79
4.8ghz = no boot

+.175 adaptive core voltage 1.413vCPUZ
4.8ghz = screen flashing

4.7ghz stability testing
+.150 (1.389v) = failed 4th loop
+.160 (1.399v) = failed 12th loop

4.7ghz 4.5ghz-cache stability testing
+.160 (1.399v) = 61 loops

4.6ghz 4.3ghz cache
+.160 (1.399v) = final
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bintsmok
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Re: Skylake i5 6600k overclock

Sat Nov 21, 2015 9:30 pm

Firestarter wrote:
bintsmok wrote:
Use x264 Stability Test v2 for overclock stability check. It doesn't create unnecessary excessive heat

you're not one of those "power virus" guys are you


Sorry, I'm new here. I don't get what you're trying to say
 
Waco
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Re: Skylake i5 6600k overclock

Sun Nov 22, 2015 1:57 pm

bintsmok wrote:
Firestarter wrote:
bintsmok wrote:
Use x264 Stability Test v2 for overclock stability check. It doesn't create unnecessary excessive heat

you're not one of those "power virus" guys are you


Sorry, I'm new here. I don't get what you're trying to say

I might be wrong, but I think he's implying that people like to refer to "power virus" type programs like LinX/IBT/Linpack as not useful when overclocking because they DO create the maximum amount of power/heat.
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Re: Skylake i5 6600k overclock

Sun Nov 22, 2015 3:27 pm

Firestarter wrote:
bintsmok wrote:
Use x264 Stability Test v2 for overclock stability check. It doesn't create unnecessary excessive heat

you're not one of those "power virus" guys are you


No, all that noise was just ONE guy actually. I'll call him Rec."WhiteCrow" 2020 to avoid naming anyone directly.

To anyone new around here, this guy is mad crazy that running a CPU or GPU for 100% for more than a few minutes will blow up your entire computer and murder your pet dog.

Anyway, fun ensued as there was a 300-page argument before everyone ran out of popcorn and moved on.
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Re: Skylake i5 6600k and i7 6700k overclock

Sun Nov 22, 2015 4:49 pm

Can you run a Cinebench R15 CPU pass?
 
Waco
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Re: Skylake i5 6600k overclock

Sun Nov 22, 2015 7:59 pm

Chrispy_ wrote:
No, all that noise was just ONE guy actually. I'll call him Rec."WhiteCrow" 2020 to avoid naming anyone directly.

To anyone new around here, this guy is mad crazy that running a CPU or GPU for 100% for more than a few minutes will blow up your entire computer and murder your pet dog.

Anyway, fun ensued as there was a 300-page argument before everyone ran out of popcorn and moved on.

Considering the clusters I manage/use at work do this 24/7 for years...no. :lol:
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bintsmok
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Re: Skylake i5 6600k and i7 6700k overclock

Mon Nov 23, 2015 8:50 pm

Using LinX/IBT/Linpack for OC stability testing will greatly limit the amount of overclock that can be achieved especially when you are only using an air cooler.

Here in the Philippines, the ambient temperature reaches 30 C to 35 C if you don't have an air-conditioning unit. The more it is important to use an OC stability test that doesn't create unnecessary excessive heat. I'm using a Noctua NH-U12S for my Core i7 4790K @ 4.4 GHz (1.2 Vcore)
 
Firestarter
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Re: Skylake i5 6600k and i7 6700k overclock

Tue Nov 24, 2015 2:31 am

bintsmok wrote:
will greatly limit the amount of overclock

that's the point
 
Ninjitsu
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Re: Skylake i5 6600k and i7 6700k overclock

Tue Nov 24, 2015 3:33 am

Just a head's up - I was getting 60-70*C with OCCT and no errors but prime95 either led to a BSOD or temperatures crossed 90*C and throttling happened.

So if it isn't prime95 stable then I wouldn't give it a pass.

Hyper 212+ and 4690K @ 4.5GHz, 1.275v.

I may have to redo the cooler and heatsink application (and orientation) I suppose, but point is that prime95 is what you should be using, really.
 
bintsmok
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Re: Skylake i5 6600k and i7 6700k overclock

Tue Nov 24, 2015 5:54 am

 
Chrispy_
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Re: Skylake i5 6600k and i7 6700k overclock

Tue Nov 24, 2015 9:22 am

And this is why I always recommend Prime95. It even explains for newbies which test you need to run to generate the most heat ;)
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Re: Skylake i5 6600k and i7 6700k overclock

Tue Nov 24, 2015 4:34 pm

Chrispy_ wrote:
And this is why I always recommend Prime95. It even explains for newbies which test you need to run to generate the most heat ;)

I don't know what you're on about Chrispy, looks to me like "Aida64 5.30.35 CPU Only" is the most efficient stability tester out there. Maximum testing thingies with only barely any heat production, what more do you need?!
 
ColeLT1
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Re: Skylake i5 6600k and i7 6700k overclock

Tue Nov 24, 2015 4:36 pm

Ninjitsu wrote:
Just a head's up - I was getting 60-70*C with OCCT and no errors but prime95 either led to a BSOD or temperatures crossed 90*C and throttling happened.

So if it isn't prime95 stable then I wouldn't give it a pass.

Hyper 212+ and 4690K @ 4.5GHz, 1.275v.

I may have to redo the cooler and heatsink application (and orientation) I suppose, but point is that prime95 is what you should be using, really.


Be careful which version of Prime95 you use with your haswell, this is why I switched to OCCT-Linpack with AVX disabled. If the prime95 you use, is the version that utilizes AVX extensions, haswell bumps the voltage up as much as .1v, I have seen a 1.35v chip jump to 1.45v, which is putting it at a higher voltage than where I was trying to stability test it (cpu may be stable at 1.45 but then you play a game and it crashes right out because the common usage voltage is not your testing voltage). Skylake is unaffected.

Edit: I think people are putting a little too much stock into the test they prefer, you have to get a feel for each chip. I have been overclocking since the mid 90s, some chips throw errors when on the edge of stability, some just outright lockup and fail (each test program can fail different too) you just have to play with them and get a feel for it. The test is just a tool to help you find stability (or lack of), as long as the test isn't flawed for the chip you are testing, you will be fine. If you tune your chip to be on the verge, a month later notice some issues, you may fire up the same test and find it on the other side of stability. These days I typically find the sweet spot of speed/temp/voltage, then drop it 100mhz, but not drop the voltage.
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Ninjitsu
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Re: Skylake i5 6600k and i7 6700k overclock

Tue Nov 24, 2015 5:59 pm

ColeLT1 wrote:
Ninjitsu wrote:
Just a head's up - I was getting 60-70*C with OCCT and no errors but prime95 either led to a BSOD or temperatures crossed 90*C and throttling happened.

So if it isn't prime95 stable then I wouldn't give it a pass.

Hyper 212+ and 4690K @ 4.5GHz, 1.275v.

I may have to redo the cooler and heatsink application (and orientation) I suppose, but point is that prime95 is what you should be using, really.


Be careful which version of Prime95 you use with your haswell, this is why I switched to OCCT-Linpack with AVX disabled. If the prime95 you use, is the version that utilizes AVX extensions, haswell bumps the voltage up as much as .1v, I have seen a 1.35v chip jump to 1.45v, which is putting it at a higher voltage than where I was trying to stability test it (cpu may be stable at 1.45 but then you play a game and it crashes right out because the common usage voltage is not your testing voltage). Skylake is unaffected.


Hmmm. Thanks for the head's up. I figured that AVX was probably what was causing temps to go through the roof and stuff but didn't note a jump in voltage - perhaps I wasn't looking.

I'm using the regular Prime95 so afaik it uses AVX.
 
ColeLT1
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Re: Skylake i5 6600k and i7 6700k overclock

Tue Nov 24, 2015 6:24 pm

Ninjitsu wrote:
I'm using the regular Prime95 so afaik it uses AVX.


Any version before v28.5 is pre-avx2 prime.

I forgot to mention, this only happens if you have the voltage on auto/default, offset, or adaptive. If you manually set (lock in) the CPU voltage, the voltage will not "boost up" or on the other side drop in C states.
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Re: Skylake i5 6600k and i7 6700k overclock

Tue Nov 24, 2015 6:34 pm

Image

These tests run in order of time taken, so last up was Handbrake converting a low quality film followed by a high quality 4K60 film. In low quality mode, all was golden. At 4K60, the system blue screened. I triple-checked with the same settings to confirm it wasn’t going through, and three blue screens makes a strike out. But therein is a funny thing – while this configuration was stable with our regular mixed-AVX test, the large-frame Handbrake conversion made it fall over.

So as part of this testing, from 4.2 GHz to 4.8 GHz, I ran our short-form CPU tests over and above the regular stability tests. These form the basis of the results in this mini-test. Lo and behold, it failed at 4.6 GHz as well in similar fashion – AVX in OCCT OK, but HandBrake large frame not so much. I looped back with ASUS about this, and they confirmed they had seen similar behavior specifically with HandBrake as well.

http://www.anandtech.com/show/9533/intel-i7-6700k-overclocking-4-8-ghz/2
 
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Re: Skylake i5 6600k and i7 6700k overclock

Wed Nov 25, 2015 1:15 pm

Yes bintsmok, you clearly illustrated that you should not rely on a single benchmark to test the stability of a system. The x264 Stability Test v2 will fail at certain points and apparently it will fail early, but that does not mean that once a system passes this test that it will also pass all others. Specifically, although tests that use AVX "create unnecessary excessive heat", exactly this property of these tests could be what triggers a failure mode that a less power hungry test won't. For example, it might trigger the VRM overheating protection, causing the CPU to throttle. Whether this is a failure and that this means the overclock is not suitable for daily use is something you have to consider for yourself of course, I imagine that if you never expect to use AVX-accelerated programs that you'd be ok if it fails under those circumstances.

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