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question about turbo boost relative to conventional overclock

post #1 of 6
Thread Starter 
So.. the easiest way to go about this is to explain my situation and why im looking for this info.

I have my chip @ 4.8 and it takes 1.31v to run everything including avx stressers. Im using gigabytes voltage offset which isnt ideal as in aida/avx stuff it calls for extra un-needed voltage (gets up to 1.35). Cooling isnt the issue, even on aida FPU only (gets hotter than prime avx) I only hit 69c.

After running quad titans for a few years i up/sidegraded to 2 1080's which the seller for me was the massive like 75% reduced power draw overall.

This led me to begin considering how I can further reduce my electric bill and for the first time ever, looked into c states & offset voltages etc.

I'm at the end of my benching/stressing/triathalon that takes place when you get a new chip (my last 4970k is at the chip graveyard in the sky). The last thing I have to do is decide/understand turbo boost relative to simply overclocking conventionally with voltage offsets and all c states/c1e/speedstep/eist enabled.

So assuming I can run all 4 cores @ 4.8 at the voltages I have dialed in, and all c states are functioning and will reduce my cpu speed and voltage drastically... Will further reductions in power useage and/or heat be present if I lowered my overclock and instead set all 4 turbo cores to boost to 4.8?

or is it effectively the same thing?

just need some insight so i can either do or not do this, and move on to the fun stuff! smile.gif

thanks!
post #2 of 6
It doesn't make any difference to the CPU how you get to 4.8, or any other speed.

But for extreme overclocking "automatic" voltage changes can be a problem due to voltage overshoots and undershoots.
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post #3 of 6
Thread Starter 
well, if all things remained the same (as above) would any benefit exist from using turbo boost to reach 4.8 as opposed to just setting it to 4.8 and disabling turbo boost?

I mean from an energy savings perspective?

ie: what I have set up now vs what I have set up now PLUS turbo core (but for the same max speed)
post #4 of 6
Thread Starter 
and ty for the reply ^^
post #5 of 6
Thread Starter 
Quote:
Originally Posted by klepp0906 View Post

well, if all things remained the same (as above) would any benefit exist from using turbo boost to reach 4.8 as opposed to just setting it to 4.8 and disabling turbo boost?

I mean from an energy savings perspective?

ie: what I have set up now vs what I have set up now PLUS turbo core (but for the same max speed)

to be clear - i get that 4.8 is 4.8 is 4.8 regardless, as you say.

my inquiry is directed more towards it being perma 4.8 except when halting/entering a c state, or if turbo boost will effectively run it slower unless im under full load?

that would give me the same performance but with lower energy consumption assuming that is the way it works? Im unsure how much load it would take to reach 4.8 with turbo core relative to any latency or how much performance loss i would incur during non full loaded times. Nor if the energy savings would make sense relative to the potential performance loss as indicated above.

hope this all makes sense.
post #6 of 6
If you setup you BIOS to run 4.9 all the time you will wse the power and generate the heat of 4.8 all the time
If you them enable turbo the computer (should) will run at 4.8 when stressed, with the attendant power and heat. But then when it's under a lower load, lower power and heat.

As I said, the issue you may find is that CPU voltagemay be to low.
If you increase the volts to a specicied amount the COU will use that amount all the time. You have to use a voltage "offset" that increases whatever voltage the motherboard chooses (for Turbo) by a specified amount. That's easy to say but sometimes very difficult to do with higher overclocks.

You have to manage V-Droop with voltage offsets:



"You can't ask questions about what you don't even know you don't know.
After a lot of failure you learn what it is that you don't know, and then you can ask about it.
"

I think that's what's going on here?
 
 
Edited by billbartuska - 7/21/16 at 4:26am
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Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
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2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
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