how to overclock a I5-6400

[nickvickers]

I was reading online that you can increase the BCLK and stuff like that, but I need some better information any help would be nice 

[SparkySamZa]

increasing the BCLK is VERY RISKY! and not worth it! if u wanted to overclock u need a K chip like the 6700K!

[Textosterone]

u cant that chip is locked u need to get a chip with a "K" in it to be able to OC

[pokechat8978]

increasing the BCLK is VERY RISKY! and not worth it! if u wanted to overclock u need a K chip like the 6700K!

Isn't BCLK overclocking supposed to be easier/less risky on Skylake than it was on Haswell?

[SparkySamZa]

Isn't BCLK overclocking supposed to be easier/less risky on Skylake than it was on Haswell?

maybe so, but you won't get much from it compared to multiplier overclockers.

Also it is prone to making your RAM and GPU unstable

[theereal]

Not worth It.

[KemoKa]

Isn't BCLK overclocking supposed to be easier/less risky on Skylake than it was on Haswell?

I'm not sure, but hopefully having the FIVR moved off the CPU would help.

[nickvickers]

Isn't BCLK overclocking supposed to be easier/less risky on Skylake than it was on Haswell?

thats what i heard im just trying to get it to 3.6ghz

[Nonco]

u cant that chip is locked u need to get a chip with a "K" in it to be able to OC

 

Thats both right and wrong. The new skylake CPUs can adjust the BCLK, memory and iGPU without being a K model.

[W-L]

Isn't BCLK overclocking supposed to be easier/less risky on Skylake than it was on Haswell?

 

Theoretically yes and it doesn't have the effect on the PCI-E speeds anymore but can affect RAM still. I still haven't seen a very in depth comparison between the BCLK and Ratio based overclocks on skylake but as long as you have a capability to change the baseclock and it's not locked outright I guess see what it can do.

 

[bcredeur97]

increase base clock and downclock RAM? somewhat easy solution...

 

 

RAM speed usually doesn't matter as much these days. since you have DDR4, just keep it above ~1800MHz (default is 2133 on basic ram kits) and you should be fine. 

 

 

I always made this worthy trade off when overclocking FX chips.

[Megahurt]

No, on skylake, you can increase BCLCK and multiplier only in k CPUs with a Z170 chipset, locked CPUs are still locked, no matter what chipset.

[H1GHL4ND3R]

Currently Asrock and MSI update they UEFI bios by tempering with microcode , they were able to alow overclocking on NoN-K Skylake CPU on boards with Z170A chip ,there are some downsides to it u have freedom to OC with BLCK but u lose iGPU in your procesor and u cant read the temps , but im sure most of use Dedicated GPU , and to see temps specialy if u overclcok you should get some better MOBO with more PWR phaeses , i work around that problem by useing thermal probe from my old Maximus formula , it work great , and my i5 6400 its a solid pice of quarc it holding stable for last 3 days constantly runing on 4995 Mhz  27x185 with coreV 1,515  its preaty hot  on 2 cores even tho im runing just for CPU xspc raistorm 420 , im gona be delliding it tumorrow , difrience of 11 C on core under high performance LC it pointing me toward wrong assambled IHS , but beside that im realy realy happy , my m8 bot 6600k and he is unable to hit stable 4,8Ghz , thank you intel for silicon lottery

I also notice that overclocking fsb have "dead spots" from around 127-140 boting stable no problem , than 140-157 dead , than 158 -169 boting and stable on all stability test , than dead till 177 and than agan 178 stab till 189 , i could bot in system with 195 but it wasnt stable and i was pushing coreV to 1,57 to much for my likeing , and sensore next betwin block and IHS was showing a hugh 92 C as soon as i start runing Prime , so nooooop than you ;p

[96Evo]

Isn't BCLK overclocking supposed to be easier/less risky on Skylake than it was on Haswell?

 

well it is easier and less risky, it different from haswell.

A lot of people on this forum hasnt done so, because their current rig is not skylake etc. 

Or some of them havent keep themselves informed to the lastest tech news.

 

when you oc locked skylake cpu, igpu will be disabled, you have to disabled turbo boost manually, ram speed will be reduced when increasing BCLK.

When you oc locked skylake cpu, you only messed with vcore and bclk.

if the ram got reduced then you can oc it.

 

I did that with my i5 6500. cooling is hyper 212 evo.

I achieved 4.3GHz at 1.26v

the ram got reduced from 2133 to 1800, but then I oc it to 2880.

the motherboard you need is msi or asrock z170 because those are the 2 that rolled out the bios update for you to oc the cpu.

 

It is stable and working perfectly, if you do this on haswell then you will run into instability issue.

[iSky]

t

 

well it is easier and less risky, it different from haswell.

A lot of people on this forum hasnt done so, because their current rig is not skylake etc. 

Or some of them havent keep themselves informed to the lastest tech news.

 

when you oc locked skylake cpu, igpu will be disabled, you have to disabled turbo boost manually, ram speed will be reduced when increasing BCLK.

When you oc locked skylake cpu, you only messed with vcore and bclk.

if the ram got reduced then you can oc it.

 

I did that with my i5 6500. cooling is hyper 212 evo.

I achieved 4.3GHz at 1.26v

the ram got reduced from 2133 to 1800, but then I oc it to 2880.

the motherboard you need is msi or asrock z170 because those are the 2 that rolled out the bios update for you to oc the cpu.

 

It is stable and working perfectly, if you do this on haswell then you will run into instability issue.

therefore the mobo was the key to OC these proce? :3 i hope cheaper mobo's with these features will be released in the near future so i can try OCing mg i5 6400

[MageTank]

Jesus. So many people in this thread know nothing about Skylake, and still give out advice? Come on people. Overclocking with BCLK on Skylake is as risky as overclocking with a multiplier. In that more heat is added. The clocks are unstrapped for gods sake. 

 

I was reading online that you can increase the BCLK and stuff like that, but I need some better information any help would be nice 

First of all, you need a qualifying Asus, Asrock, or MSI board with the unlocked BCLK bios. For Asrock, it is any bios that says "Sky OC". Others might have different names. Next, I want to warn you of some downsides before we begin.

 

#1. You can no longer activate C states. Means no power saving features.

#2. You lose AVX instruction sets. This won't matter for gaming, but if you do heavy compute/math on your computer, you might not want to do it.

#3. Your cache speeds suffer by like, 75%. Seriously. My L1 cache was 820GB/s before overclocking my 6600T, now they are 220GB/s. 

#4: You can no longer use your iGPU when you have your BCLK adjusted.

 

If none of this bothers you, then lets proceed.

 

You will want to be mindful of your memory speed the entire step of the way. Make sure that when you adjust the BCLK, that you also adjust the ram strap back to the proper speed (or slightly below it) to prevent your board from having to retrain the memory, and potentially failing to do so. You can always overclock ram afterwards.

 

Start slow. 5% increments are ideal, and use a simple stress test of your choice (I prefer Linpack, quick and easy, but XTU should work for quick runs) and stress it for 10-15 minutes. If it does not fail, do another 5%. Remember to add vcore when needed, and always be mindful of temps. Eventually, you will reach a point where BCLK cannot be stabilized. Mine was at 161 BCLK. When you reach this state, you need to add more PCH voltage. Only a little bit. 10% at most, but mine managed to work after going from 1.000 to 1.050. You may also need some VCC PLL voltage, and the same rule applies. +/- 10% is 100% safe for 24/7 use. Mine was 1.200, i changed it to 1.250, and it was fine.

 

Once you reach your desired CPU clock, and it is stable, work on bringing the memory back to its former glory (Or higher, if you have the time) and dial in your timings manually. That way, the board won't accidentally retrain something down the road, causing you a headache. I managed to get my 6600T from 2.7ghz to 4.5ghz on the stock cooler, but your mileage may vary.

[flipped_bit]

Certain manufacturers have managed to enable BCLK overclocking on non-K Skylake parts, but I wouldn't rely on it going forward.  I'd be surprised if Intel allowed this to continue for long; I'd expect them to disable this ability via a firmware update. 

[MageTank]

For the people above that were 100% incorrect, and to the non-believers, this is me with my 6600T's ITX 24/7 stable speed (Even shows the cache performance loss i mentioned above).

 

 

As you can see by the "Original: 2700" i am using a 50% overclock at the moment. I also have a 4.5ghz profile, but it will not be suitable for long term use until ASRock Customer Support responds to me, as i found a bug within my BIOS that causes cache fluctuation when going beyond 170BCLK, making it impossible to maintain long term stability. As soon as they get back to me, I will post whether or not they added a cache adjustment function to their bios.