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Windows 7: I7 haswell BCLK (base clock) overclocking is safe? How it works?

22 Oct 2014   #1
Vistangel

Windows 7 Home Premium x64
 
 
I7 haswell BCLK (base clock) overclocking is safe? How it works?

Hi guys, how far can I push the baseclock on Haswell i7 4790? I tried 105x40 on all cores, giving me a nice 4.2ghz for all cores instead of 3.8ghz but I heard it won't even boot on this setting - well it passed a short stress test, so it booted for me and working fine. Also it's still undervolted with -0.20v instead of -0.10 so it's cooler than stock. So I'm confused if I can make a 110x40 (4.4ghz) overclock with it. And also what will happen if it fails? Just BSOD and reset or something serious (just because I've heard that too, it will crash the whole system so I can't turn it on anymore).
And how does BCLK overclocking effect RAM? I see instead of 666mhz, it's on 699,7mhz and I don't know if it's good or bad or what it means.
Also I noticed in passmark that intel HD graphics could beat 2 stock comparable GPUs in all tests instead of 1, also it became number one in all 2d graphics test. So this looks promising, I didn't know this will affect the iGPU too.
System specs are in the system specs.


My System SpecsSystem Spec
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22 Oct 2014   #2
Shimshom

Windows 7 Ultimate x64
 
 

Before attempting to overclock I did approx 6 months of reading and started to experiment with an older system to ensure I fully understand what I'm doing (Mostly). You'll find many many forums with great tuts about how to recover from overclocking failure, resetting the BIOS, unlinking your RAM and much more and as long as you do it in small steps and continue to test every time you change settings in the BIOS you'll end up writing tutorials yourself
My System SpecsSystem Spec
22 Oct 2014   #3
Dude

Windows 10 Pro X64
 
 

You would be better off just increasing the core ratio's. As shimshom said above, do your research and take it in steps.

Here is a link with some good reading for you

The Intel Devil's Canyon Owners Club
My System SpecsSystem Spec
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23 Oct 2014   #4
Vistangel

Windows 7 Home Premium x64
 
 

Quote   Quote: Originally Posted by Dude View Post
You would be better off just increasing the core ratio's. As shimshom said above, do your research and take it in steps.

Here is a link with some good reading for you

The Intel Devil's Canyon Owners Club
But I have a non-k i7 4790, not a 4790k. I wouldn't be trying with the harder way then lol. My max fixed core ratio is 40x so I can set 4 cores to 40x105 instead of 38x99.9.
My System SpecsSystem Spec
23 Oct 2014   #5
PimpleMaze

Windows 7 Ultimate x64
 
 

I believe the core ratio's on the i7490 are locked. for overclocking you should've coughed up 30 more for a 4790k.
Overclocking bus speed never gave me anything but problems.
My System SpecsSystem Spec
23 Oct 2014   #6
Vistangel

Windows 7 Home Premium x64
 
 

Quote   Quote: Originally Posted by PimpleMaze View Post
I believe the core ratio's on the i7490 are locked. for overclocking you should've coughed up 30 more for a 4790k.
Overclocking bus speed never gave me anything but problems.
Yep. OC is not that important to me, I just wanted to see passmark score clock-to-clock with my non-k i7 because I've noticed non-k i7s are a little bit slower with the same clock speed than their k counterparts. I'm not really into OC altough I wish i7 4790 would come with the 4.4ghz turbo boost.
And there's a reason why I didn't buy devils canyon. When I wanted to buy a PC, 4790k was out in US and almost everywhere except my country. The day when they shipped me the i7 4790 for $350, i7 4790k was around $420-$480 in 2 stores which I didn't trust. It didn't worth almost +$100.
My System SpecsSystem Spec
25 Oct 2014   #7
Vistangel

Windows 7 Home Premium x64
 
 

So how far is it safe to set the base clock?
My System SpecsSystem Spec
25 Oct 2014   #8
Dude

Windows 10 Pro X64
 
 

I stick with my first comment. Even though you can only get 4-600mhz more, even on a non K version it is more stable. Use the turbo method instead of a straight setting. If you are wanting to push the speed then get a k chip, plain and simple
My System SpecsSystem Spec
25 Oct 2014   #9
Vistangel

Windows 7 Home Premium x64
 
 

Quote   Quote: Originally Posted by Dude View Post
I stick with my first comment. Even though you can only get 4-600mhz more, even on a non K version it is more stable. Use the turbo method instead of a straight setting. If you are wanting to push the speed then get a k chip, plain and simple
But how can I use ratio overclock on a non-K i7 if the multiplier is locked to 40??? I've tried to find out and also seen a video about Ivy Bridge on Youtube and he easily set the multiplier to 43 on a non-k ivy bridge i7 but for me, it always jumps back to 40 and doesn't let me to give it higher ratio eg: 42 or 43 like in the video.
And I have asus mobo - altough not the one in the video - but it mine has z97 chipset and I tried with the same XMP profile as he but it didn't work. So how can I earn that "little" 400-600mhz boost? I would be happy if I could set it between 4.2-4.4ghz, I just want it to match the base clock of Devils Canyon, nothing more
My System SpecsSystem Spec
25 Oct 2014   #10
Dude

Windows 10 Pro X64
 
 

You have to use the turbo settings. Look in your BIOS under advanced mode. If you can, post some screenshots of your bios and I will try and help.

I use MSI so it is different than asus. I could oc an non k i5 by about 400mhz. It may not work for you but it is worth a try.
My System SpecsSystem Spec
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 I7 haswell BCLK (base clock) overclocking is safe? How it works?




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