Boom! 4.3GHz on i5-6400 (from 3.3 to 4.3)
Printed From: ASRock.com
Category: Media&User's Review
Forum Name: Intel Motherboards
Forum Description: ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=1611
Printed Date: 20 Jun 2024 at 8:09pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Boom! 4.3GHz on i5-6400 (from 3.3 to 4.3)
Posted By: Edwin
Subject: Boom! 4.3GHz on i5-6400 (from 3.3 to 4.3)
Date Posted: 28 Dec 2015 at 6:14pm
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SKY OC REALLY WORKS ON MY Z170 Pro4!!!! BCLK goes up to 140MHz with ease, can overclock up to it's limit at 159MHz(4.3GHz) https://picx.xfastest.com/honavia/others/6400.png" rel="nofollow - https://picx.xfastest.com/honavia/others/6400.png" rel="nofollow - Pic link 
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Replies:
Posted By: Xaltar
Date Posted: 28 Dec 2015 at 7:05pm
Great results! A ~30% performance bump is nothing to sneeze at  The fact that it is on a non-K CPU is even more awesome!This reminds me of my days with my old Celeron 300a getting it up to 700mhz and wiping the floor with pentium 3s at 450 - 550mhz. I think I ran it at 600mhz 24/7. An old era has returned and I for one can't wait to see what kind of fun can be had with Sky OC
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Posted By: DooRules
Date Posted: 28 Dec 2015 at 8:45pm
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Yes sir, great job. Sure hope intel just decides to leave this alone. Let people enjoy their hardware.
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Posted By: parsec
Date Posted: 29 Dec 2015 at 2:15am
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Nice, nice, nice! Now if I could only get a decent non-K Skylake processor locally. All I can get are Skylake i3's, or non-K i5's, but the i5's are over $200!! I guess I'll just try the beta UEFI for my Z170 Extreme7+ on my 6600K, and see what happens...  ------------- http://valid.x86.fr/48rujh" rel="nofollow"> 
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Posted By: Xaltar
Date Posted: 29 Dec 2015 at 3:13am
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That would be great to see Parsec, you can try BCLK overclocking vs Multiplier overclocking and see what kind of difference it makes on the same platform |
Posted By: Edwin
Date Posted: 29 Dec 2015 at 10:08am
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raising BCLK to overclock is really not something new, I've been doing it on AMD CPU for years and you can do that to old intel processors, if I'm correct you cannot do that on anymore on sandy bridge platform(LGA1155), used to overclock the hell out of a Celeron back in the socket 478 era
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Posted By: Xaltar
Date Posted: 29 Dec 2015 at 2:05pm
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Before Sandy Bridge the BCLK was determined by a chip on the motherboard and it was up to the motherboard manufacturer if the end user would have access to the BCLK settings via BIOS. Even in cases where it wasn't you could use software if you could identify your PLL (clock generator) chip. Sky OC gives us the same control almost a decade later. I used to have a socket 478 Pentium 4 2.4b that I overclocked to 3.6ghz using nothing but BCLK and voltage. Those were the days I want to see return
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Posted By: cainn24
Date Posted: 29 Jan 2016 at 6:11am
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Just hit 4.32GHz using the same mobo/cpu combo but I had to up the vcore to 1.39v and set LL calibration to level 2 (only sagging to 3.6v under load now instead of 3.44, which didn't keep things stable when running prime). I also upped the PCH to 1.1 and DRAM to 1.3, but I'm not sure that those last two were necessary. What voltages do you have dialed in yourself?
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Posted By: cainn24
Date Posted: 29 Jan 2016 at 8:02am
| Turns out that I couldn't get things completely stable with a 160MHz BLCK after all and I didn't want to up the vcore any further. Dropping down to 159MHz does however seem to be a rock-solid plan :) |