How can I overclock i7-4790 (non K) with Intel XTU to 4.22 GHz?

[M3D31R0S]

I do realise that I need the i7-4790k to properly overclock, but I'm curious to see what I can do with my own i7-4790 (non K). I've been browsing online like crazy and I found this reply here on Tom's Hardware: http://www.tomshardware.co.uk/answers/id-2466894/overclocking-4790.html#15963936 + this screenshot from him: https://www.dropbox.com/s/nefhtu9df5zmy20/i74790OC.PNG?dl=0
Apparently user callDevil managed to overclock his i7-4790 to 4.22 GHz.
I tried to do what he did, but on my Intel XTU the "Reference Clock" thing is locked and I can't put it to 105.5589MHZ like suggested. Here's how it looks like to me (it also seems I have a newer version): http://i.imgur.com/bBS4pTB.png
I went to my BIOS (which is different from his, an American Megatrends one), and there's not a single option for overclocking. The closest is the Intel Turbo Boost thing, which was already on...
So, what am I doing wrong?

 

[DonkeyOatie]

That person got there by changing BCLK, I would guess. That's the base clock. I have changed that on a locked chip. The 'locked' applies to the multiplier.

BCLK should be 100 or close to it. Every 1 you increase it by, will give you 40Mhz more speed, but will de-stabilize your system, eventually (quite soon).

 

[M3D31R0S]

That person got there by changing BCLK, I would guess. That's the base clock. I have changed that on a locked chip. The 'locked' applies to the multiplier.

BCLK should be 100 or close to it. Every 1 you increase it by, will give you 40Mhz more speed, but will de-stabilize your system, eventually (quite soon).

Thanks for the reply.
How can BCLK be changef? I'm basically a noob in the world of CPU overclocking, and while I am aware of the dangers, I would like to know more. Any good guide out there explaining what BCLK is precisely and how it can be changed?

 

[DonkeyOatie]

It should be in your BIOS somewhere. What board and BIOS are you using?

BCLK is the main clock that runs the whole system and synchronizes all the parts. The multiplier in the CPU multiplies the base clock to get the actual CPU speed, but the base clock also controls memory and lane speed, so if it gets too high, things won't work properly.


If you had an i7 5820K, and you wanted to use 3000 Mhz memory, the system changes the BCLK up from 100 to 125 to handle the memory.

I use an ASRock Z97M OC Formula motherboard and have a BCLK change option in my BIOS.

 

[M3D31R0S]

It should be in your BIOS somewhere. What board and BIOS are you using?

BCLK is the main clock that runs the whole system and synchronizes all the parts. The multiplier in the CPU multiplies the base clock to get the actual CPU speed, but the base clock also controls memory and lane speed, so if it gets too high, things won't work properly.


If you had an i7 5820K, and you wanted to use 3000 Mhz memory, the system changes the BCLK up from 100 to 125 to handle the memory.

I use an ASRock Z97M OC Formula motherboard and have a BCLK change option in my BIOS.

I doubt it's on my BIOS, I looked every single option on it before and couldn't find anything similar to that... my motherboard is a FUJITSU D3230-A1 and the BIOS is from American Megatrends. Yeap, it's pretty crappy :/, but this PC was basically built for offices and I added a GTX 750 Ti to it to make it a "gaming PC". It seems I'll have to invest in a better mobo then...

 

[DonkeyOatie]

My BIOS is American Megatrends. Version 1.60. What version is yours?

 

[M3D31R0S]

My BIOS is American Megatrends. Version 1.60. What version is yours?

According to XTU:

v4.6.5.4
Or am I looking at the wrong place and should look into the BIOS for another version number? I can take pictures of the BIOS itself if it helps.

 

[DonkeyOatie]

No. It's there. It's a FUJITSU mod. 1.34.0

I would not try that. There may be a lot of special modifications.