i5-6500 overclocking limits

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tomaszandrzej

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Oct 22, 2014
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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
 
Solution
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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.


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BCLK overclock = base frequency OC option is in addition to multiplier OC on K chips.
Sky OC = base frequency OC option if you want to OC Non-K chips that have fixed multiplier.
I believe the "BCLK Full-range OC" may be referring to granular adjustment of BCLK at 1MHz increments or finer.

Hope this helps.
 
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ty
i think i will get this combo and rx 480 will be the best buck 😀
 
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Set my 6500 to stable 4.8 GHz (bclk 150), 1.35V, Corsair H110 cooling (m/b asus maximus viii hero).5 Ghz and higher is unstable, needed to give high voltage and therefore overheat. Possibly putting arctic cooling mx4 or similar thermal grease under cooler and liquid pro under proc cover will let to get to 5.1- 5.2 GHz, but with overvoltage.
 
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I've noticed that if I OC to 4.8, I get BSOD with a secondary core error. I'm on a AsRock Z170 Pro4S, Lucifer VII Cooler, Corsair HX850i, MSI GTX 970 4G, and GSkill DDR4-2400 (15.15.15.35). I have my voltage fixed @ 1.39 (won't let me set any higher). Any suggestions to get it stable at a higher OC would be welcomed.
Thanks
 
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Really don't know, why your bios won't let setting more voltage. Recheck- disabling c-state, turbo-mode and speed-step; setting boot performance mode to turbo performance (if have such point- my m/b has it in advanced/cpu configuration). Also try to lower ram frequency. After that try to change cpu load line calibration from 1 to 8- try each of 8 steps.
 
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The AsRock MOBO automatically disables c-state,turbo-mode, and speed step. Did the RAM frequency suggestion, but could only lower it to 1600 to get a stable 4.3. Wondering if I upgrade the RAM...? UH...not entirely sure what the "load line calibration" is... or whether I can adjust it. Will check right now.
 
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Upgrading ram is not good idea. Better for you to sell 6500 and buy 6600K- you'll rock. Difference is only 20$, and you already have a nice cooler.
BTW, think that cap of 3.9v is limitation in bios, because 4.0v is maximum recommended voltage of skylake. Search for smth like extreme oc or override cpu voltage limit. There must be option for disabling cap of voltage.
 
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oh i just realized i posted something and left someone hanging lol
if ur having problems oc'ing non-k...theres some key points to it, other than that..honestly if friggen easy peasy
1 do u have the proper mobo?
2 do not update bios. recommend u find a safe and early one.. there should be a forum/post with a list of it.
3 dont touch everything that could be touched. thats the worst thing u can do when ur oc'ing a cpu thats not meant to be oc'd
4 follow the instructions and dont over do ur overclocking. just because someone did it doesnt mean u can, even if u know u have the same setup and everything as buddy that doesnt mean jack all cuz chips are not equal
 
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People go by old trend it seems! haswell non-k didnt do great oc so Skylake will also follow the same path. No its not the case.

Running Core i5 6500 at 4.5 Ghz now with good temps (doesnt budges past 75 Deg C even on stress test using a hyperx 212 evo) can even go a bit higher too. All done on Asus Z170 Pro Gaming motherboard.
 
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=) non -k overclockers hooorah!

do 4.6 doo it .
im actually tinkering around to pass 4.6... so far 4.602 lol
 
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I bought the board and cpu from a shop directly not online, its cheaper like that. The shopkeeper told me that its nuts to get cheap non-k cpu for that motherboards. Not only that the tomshardware forum wasn't positive about this saying you wont get past 100-200 mhz oc.

But now its paid up. Good to see a cheap chip like this coming close to high end chip like 6700k at least in gaming performance.

4.6 Ghz is quite good oc. Wont bottleneck anything till gtx 1070 sli at 1080p.
 
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up ur voltage
 
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1,45V
 
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