i7 4770k Turbo 3.9 vs 4.0 Clock

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dsr07mm

dsr07mm

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Is this really worth ? In terms of gaming performance and in terms of livestreaming/recording games aswel ?

I noticed that sometimes even under 90% of cpu usage with turbo cpu is on 3.5/3.6 when sometimes on lower usage is going to 3.9ghz so I thought that clocking cpu to 4.0ghz will make something in terms of performance but I cant really notice anything despite encoding/recording/streaming tasks.

Should I keep 4.0ghz or just go back to turbo ?
 
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Damn_Rookie
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photonboy

photonboy

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Jun 20, 2006
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Um... you do know that 4.0/3.9 x100% = 2.6% ?

In other words you overclocked by about 2.6% so I'm not sure how you would expect to notice a difference.

As for going back to "Turbo" it depends on how you overclocked. I would suggest using the motherboards "quick" overclock method in the BIOS (name varies) which might overclock as high as 4.2GHz but should also keep the Intel Power Management intact so adds little to heat.

On my motherboard I just click it, the PC reboots, I go back into the BIOS and confirm the new Turbo frequency. You will also need to verify the "XMP" memory profile is proper or click it again to set proper if not (i.e. if it's supposed to be 1866MHz but drops to 1333MHz).

Other:
I'm not sure how you are recording/streaming but if you have an NVidia card I suggest either Shadowplay or OBS and use your GPU encoder. https://obsproject.com/

I don't think AMD has a working encoder but you can use Intel Quicksync regardless.
 
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Brunostako

Brunostako

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Dec 16, 2013
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Turbo state happens when only one core is needed, so that one single task is done faster. When all the cores are needed, all work at the base clock.

That's why you see only 3.5GHz with 90% and 3.9GHz at what you're calling lower usage. It's not lower usage, it's just that only 1 core is working.

If your OC is stable, you can keep it.

Now, OC comes with some drawbacks: faster CPU degrade, more power consumption and more heat output.

BTW, could you give the link to the image you're using as your avatar?
 
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dsr07mm

dsr07mm

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Yeah just curious to hear other opinions. I will try that other turbo settings, to be honest I just wanted to find stable clock, this is higher as I can go on this chip with evo212.

I know about ShadowPlay etc but I want better quality, working on that to get second PC as dedicated streaming/recording machine since that is my fulltime job (atleast recording). Shadowplay is a problem for now because its using variable bitrate and Premiere (fastest h264 rendering software) doesnt like that and its making desync so I need to record only 10-15min long videos and then stop/rec shadowplay always. With commentary its kinda pain in the ass :) I guess I will leave 4.0GHz for now if I cant go higher, I guess stable 4.0 is better then 3.5-3.9 oscilating.

Heat is okay, in Prime95 highest temperature is 77c on one core, but If I get higher voltage then 1.200 I get higher temperatures, so loosing my nerves for only 200mhz which is realistic with evo212 is kinda pointless. CPU degradation is something relative I guess, 2 years will be enough till my next upgrade :)

@Brunostako, unfortunately I have this avatar for a long time on this forum, I dont really remember :( But I'm pretty sure that I was googling in images for "anime avatars"..

 
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Damn_Rookie

Damn_Rookie

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That's not quite correct. You're right that it won't operate at 3.9 GHz when all the cores are loaded, but it won't drop all the way down to 3.5 GHz.

With 1 or 2 cores loaded it operates at 3.9 GHz, with 3 cores loaded it drops down to 3.8 GHz, and with all 4 loaded, it runs at 3.7 GHz. The specific scaling varies with CPU model and architecture (While not the best of reference resources, Wikipedia lists the turbo scaling for all the modern Intel CPUs, including the 4770K). My 3570K has the same scaling as the 4770K, so when stress testing all the cores, they all run at 3.6 GHz, 200 MHz above the 3.4 GHz base frequency.
 
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dsr07mm

dsr07mm

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That actually sounds interesting how that works. Didnt think that way to be honest. I expected higher freq with higher loads/usage. I thought that turbo is just a "setting" to save CPU power when its not needed but obviosly its working other way around. So all in all stable 4.0ghz is better then turbo 3.9 even if its pointless difference ?

@Brunostako, I throw like 10 minutes just to find same damn avatar and I couldnt :) Although I'm not like "huge" fan of anime I found a lot of pretty much identical pictures on google images :)
 
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Damn_Rookie

Damn_Rookie

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Yes 4.0 is certainly better, even if it is only marginally better.

With an overclock that small, in all honesty I'd normally just recommend setting it back to stock as you'd be hard pressed to feel the small clock difference, however for the usage scenario you talk about, with the system being used for productivity reasons as part of your job (where faster performance can actually have a direct effect on your earnings), well that changes things. As long as it's stable, and the temps are okay, I'd say keep the overclock.
 
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