Questions about overclocking I5 8600k

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rds1220

rds1220

Splendid
Sep 10, 2011
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Had two questions both relating to overclocking the new Coffee Lake I5's. So I got my new I5 8600K and built my new computer.

1) When you build a new computer do you overclock your CPU right away or do you wait to let things settle and make sure everything is working right?

2) How good are the 8600K's overclocking like what is the average clock speeds people are getting? I just want to get an idea so I know what to shoot for. For my I5 2500K I know a lot of people were getting 4.5 GHZ so that was my ultimate goal but I was shooting for 4.3 GHZ before adding voltages and stuff like that
 
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maruniverse7

maruniverse7

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Jan 6, 2018
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I just recently overclock my i5 6600k to 4.2 with a max of 1.150V and is stable. I Could over clock more but temps are to high and loud to cool down with tower fan. If you are gonna overclock to 4.5 I recommend going step by step. Download CPUID, there u can monitor live voltage ratings. Over clock the CPU just a little and add a small bit of voltage. For easy exmaple: lets say the speed is 4.0 and its at 1.160V. Over clock to 4.2 and set voltage 1.1.180 and try a stress test on on the intel tuning utility. If passed after 5Mins. maybe overclock some more but i recommend not going over 1.320V
Just take it slow and if something goes wrong clear the CMOS on motherboard.

CPUID https://www.cpuid.com/softwares/cpu-z.html
Intel Tuning https://downloadcenter.intel.com/product/66427/Intel-Extreme-Tuning-Utility-Intel-XTU-

 
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urbancamper

urbancamper

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Apr 10, 2011
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If all you want is 4.5ghz all you have to do is raise the multiplier to 45 and leave everything else alone. You might get to 4.6 doing this also. To go higher you most likely would also need to change the vcore and use the LLC.

As far as average overclock, I think it is 4.8. I myself am a 5.0ghz on a vcore of 1.345v with the LLC set at 5(out of 10 settings) It does get warm during stress testing though. You really need good cooling. The max temp on this chip is 100c, though during stress testing going above 85c is not recommended. Also during normal usage try and keep it below 75c. Some also say 80c. Max safe vcore is 1.4v

As you most likely know already, all chips are a bit different. mileage may vary.

Oh and ya I personally overclocked it as soon as I was done installing all my software.

 
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geofelt

geofelt

Titan
Oct 9, 2006
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I5-8600K has much more headroom for overclocking.
How high you can go is determined by your luck in getting a good chip.

Here are some statistics from silicon lottery:
as of 12/01'2017
What % of I5-8600k chips can oc
at a agressive vcore of 1.4 or so and delidded
4.9 98%
5.0 84%
5.1 65%
5.2 38%
5.3 13%

Some caveats here.
They are talking about their binned chips which have been delidded.
Stock chips will get hot faster.

Your limit will be the vcore you can tolerate.
If you implement speedstep and adaptive voltage, I would feel comfortable running at higher multipliers.
When not heavily used, the multiplier and vcore will drop.

I find I can't wait to see what a chip will do so I oc, at least a little bit for starters.
I oc by just raising the multiplier with voltage on auto.
I know there are more sophisticated added settings but I am more of a user than a record seeker.
Once I see what the limits are, I back off a few multipliers.
Once it is stable, I leave it alone.

I have little doubt that you can comfortably reach 4.5 if you have a decent air cooler.


 
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C

chrysalis

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Aug 15, 2003
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shame those stats are at 1.4v, I think most people would not be happy using 1.4v 24/7

I would like to see stats at 1.3v or 1.35v at absolute max.

Ayt first I thought I had a reasonable chip as I was getting no instability on desktop and passmark/aida testing.

Then I started testing with intel burn in test, and its starting to look like 5ghz wont work at all. I am now considering if I can accept it will be stable without AVX and just avoid AVX workloads, or to drop the multiplier. I am hoping its not really bad that it has to go below 4.5 to pass a burn in test.
 
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