i5-6500 overclocking limits

tomaszandrzej · Dec 18, 2015

So we can overclock the non-K Skylakes now. Surely makes the whole range more interesting.

I am very new to this and I only managed to get it up to 3840MHz by increasing BCLK to 120MHz with my Corsair Vengence LPX DDR4 3000 running at 2880 14-16-16-36.

I would like to get the CPU to above 4GHz but it wont boot on BCLK 125MHz.
Do I need to change voltage or something else?

It is running really well on Noctua cooler maxing at 65C in gaming and idling at just above 30C.

The motherboard is Asrock Z170M Pro4s with BIOS 2.23

Many thanks for your time

PTOWN GAMER · Dec 18, 2015

Only 100Mhz, not alot.
They say you can overclock them but you will struggle to get them to overclock even 100mhz.

So i say you go for the 6600k.

the 6600k will let you get upto 4.5ghz with ease.

Read this:

http://www.anandtech.com/show/9848/bclk-overclocking-intels-non-k-skylake-processors-coming-soon

HEXiT · Dec 18, 2015

go into your ram settings and reduce its multiplyer. to get it back down to stock numbers. then try.

the ram is also oc'd when you bclk oc, due to being strapped to the cpu multi. so the higher the bclk you go the lower the ram multi has to be to keep the ram in spec.

Slovenia rulez · Dec 18, 2015

@HEXiT yea you are right. I had the same problem which I fixed by setting the ram to a lower speed and then increasing the base clock until I reached the normall ram speed and now I have my cpu at 4,2ghz xD

tomaszandrzej · Dec 19, 2015

Slovenia rulez :

What CPU and motherboard are you using?

Slovenia rulez · Dec 19, 2015

I am using gigabyte ga z170 motherboard and an i5 6600 non "K" edition

HEXiT · Dec 19, 2015

Slovenia rulez :

yeah they oc the in a similar way to the old neph parts.
you should be able to drop your cpu multi and increase your bclk if you need to fine tune your ram without loosing overall clock speed.

Prenihility · Dec 19, 2015

Well, i found an interesting video on BCLK Skylake overclocking. i5 6400 in use. I reckon the 6500 should do better, and should be more reliable, as it's binned higher. Goes past 4.0GHz.

https://www.youtube.com/watch?v=TqWNyhjhE6I

tomaszandrzej · Dec 20, 2015

Ok so I got it up to 4GHz on 125MHz BCLK with slightly slower RAM and everything runs nice and cool.
Should be able to push it frther still.

How do I change CPU multiplier?

Unfortunately my WD Caviar Green HDD which is usually switched off and silent started making noises (like a drop of water ?) which is extremely annoying especially that the system is usually silent.

Has anyone else had problems with peripherals while overclocking?

HEXiT · Dec 20, 2015

not sure mate but locked multi normally just means its at its locked maximum. sometimes theres an option to lower it. i guess it will depend on your bios support.

dont forget about uncore.. the cpu's mmu ram cache.
the uncore is also tied to the base clock so try adjusting its multi if your having to drop your ram multi a lot.
also make sure your ram isnt set higher than your uncore frequency or the pc wont boot.

on my old i7 the uncore is x2 the ram frequency minimum. i would add +2 to the uncore if i was oc-in'g the ram directly or pushing the ram past spec with the cpu oc.
also had to add .020v to the uncore voltage.

on yours as its newer hardware the voltages might be different but the method seems to be the same.

HEXiT · Dec 21, 2015

couple of basics. you have set your voltages to manual? and you have unhitched the igpu form the blclk
the igp can limit your efforts to oc as its also tied to the blclk. so make sure its detached.
dropping multipliers and increasing the blclk, may force an increase in voltages if there left on auto. so set them all to manual (set to match the stock defaults) .

http://www.masterslair.com/determining-your-maximum-bclk-base-clock-frequency-i7-i5-i3 this article i found helpful back in the day. yes the info is old, but the method is sound for finding the max blclk.

http://www.tomshardware.co.uk/skylake-base-clock-overclocking,news-51961.html
fact is mate theres no reason why you cant get up to 4.5+ghz

rderubeis · Mar 27, 2016

for some reason i have the asrock z170 x1 board, and when i go to voltage settings it wont let me change vcore voltage, and it wont let me change anything to fixed theres no option at all

SourMan · Apr 8, 2016

incase u didnt hear, u cant overclock non k models anymore. ^

rderubeis · Apr 8, 2016

SourMan :

you can overclock them. Im overclocked right now at 4.3 at 1.3 volts. You just need to make sure you have the correct bios installed.

SourMan · Apr 8, 2016

rderubeis :

Ahh okay. I kinda shyed away from the i3 6100 because of the fact I thought you can't over clock anymore. Btw do you know if you are going to be able to keep your oc settings forever? New to this.

HEXiT · Apr 8, 2016

as long as you dont upgrade the bios to a more locked down version you will be able to oc... you should in a lot of cases even be able to downgrade your bios, if you find you have been shipped the newer locked version. but that will depend on the MB manufacturer.

rderubeis · Apr 9, 2016

SourMan :

rderubeis :

Ahh okay. I kinda shyed away from the i3 6100 because of the fact I thought you can't over clock anymore. Btw do you know if you are going to be able to keep your oc settings forever? New to this.

as long as you have the right motherboard, and you have the right bios flash then yes

SourMan · Apr 9, 2016

rderubeis :

SourMan :

as long as you have the right motherboard, and you have the right bios flash then yes

Yeah I have a asrock z170 pro4s mb.

L0stChild · Apr 9, 2016

=)
i got my i5 6400 to 4.6ghz

SourMan · Apr 9, 2016

That's awesome! I ended up going with a 6600k because it was worth the extra 30$ imo from the 6500 or i3 6100 just to play it safe incase I couldn't oc non k chips.

rderubeis · Apr 9, 2016

SourMan :

rderubeis :

Yeah I have a asrock z170 pro4s mb.

ya then you will be fine just make sure you get the correct bios, and flash it.

jhyde99 · Apr 15, 2016

Incase you still need help... There is a great video on the website that has the BIOS' (overclocking.guide). Followed all his steps (adjusted obviously for our numbers) and have my 6500 at 4.25Ghz on 1.32V, I think. Will be pushing more soon.

rderubeis · Apr 15, 2016

jhyde99 :

Ya i tried the highest i can get mine is 4.3. I tried 4.5 but the temps get to hot with my 212 evo, and it crashes

Kyle Bevan · Apr 16, 2016

rderubeis :

Hi, i'm buying a new PC and wanted to get the i5 6500 OC to about 4.2 with the same cooler you have.
is it still possible to OC the i5 6500, and what mobo do you recommend? CHEAP.
also can you OC it with the latest bios or am i going to have to download it on a USB and flask boot the bios or something like that anyhow?

rderubeis · Apr 16, 2016

Kyle Bevan :

i use the asrock z170a x1 and yess u would have to put the bios on a flash drive and get version p1.40 if u get my motherboard. You can also get the asrock z170 pro4. Just dont get the asrock z170 micro board the 212 evo wont fit

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