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Kaby Lake Overclocking Guide [With Statistics] - Page 171

post #1701 of 2909
Quote:
Originally Posted by seven7thirty30 View Post

New build 24/7 overclock:

Username: seven7thirty30
CPU Model: i7-7700K
Base Clock: 100
Core Multiplier: 50
Core Frequency: 5.0
Cache Frequency: 4.6
Vcore in UEFI: 1.4
Vcore: 1.44
FCLK: 1000
Cooling Solution: Delidded, Custom Loop
Stability Test: Realbench 2.43 8-hour

Batch Number: Malaysia L641G184
Ram Speed: 3600 (16-16-16-36)
Ram Voltage: 1.35
VCCIO: 1.225
VCCSA: 1.25
Motherboard: Z270 Asus Maximus IX Extreme
LLC Setting: 8
Misc Comments: No AVX offset

Was that the stock default Vcore?
post #1702 of 2909
Quote:
Originally Posted by Jpmboy View Post

no it won't, and avoiding phase shedding and core parking will increase performance. Basically, if you are using adaptive or offset, disable all c-states (freq and voltage will drop to idle levels). With manual override, the higher c-states will idle and then "sleep" cores but the voltage to any "awake" cores will be at the manual override. That's why it is call "override". smile.gif

Why would he disable C-states on adaptive? The reason to use adaptive if to reduce power consumption. So does C-states enabled.
Quote:
Originally Posted by wingman99 View Post

Was that the stock default Vcore?

Don't think that 1.4 V default Vcore would have passed QC. But hey, it's Intel who's making Kaby Lake with crappy TIM so who knows...
    
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post #1703 of 2909
Quote:
Originally Posted by dirtyred View Post

HWiNFO should report it correctly. Vcore will and should jump up and down a bit depending on CPU load. That's called Vdroop and it's normal. Reset your BIOS to defaults then SET AC and DC load line calibration to 0.01 and set LLC level on maybe 4-5. 6 and up will probably result in too much voltage compensation. After this adjust only the multiplier and Vcore on adaptive voltage until your temps are fine and your system is stable. Alternatively you could just set to fixed voltage and once you find the perfect value switch to adaptive mode to save some power. But it's all written down in the first post of this topic and it's pretty detailed even for a noob like me.

Yeah I've read over it a bit but not all of it in detail. The Vcore HWiNFO is reporting then is on par with what you mentioned in your first post to me. As for LLC I'll look into that haven't seen much info on the EVGA boards.
post #1704 of 2909
Quote:
Originally Posted by dirtyred View Post

Why would he disable C-states on adaptive? The reason to use adaptive if to reduce power consumption. So does C-states enabled.
Don't think that 1.4 V default Vcore would have passed QC. But hey, it's Intel who's making Kaby Lake with crappy TIM so who knows...
What is Kaby Lake specification VID limit?
post #1705 of 2909
Quote:
Originally Posted by stryfetew View Post

Yeah I've read over it a bit but not all of it in detail. The Vcore HWiNFO is reporting then is on par with what you mentioned in your first post to me. As for LLC I'll look into that haven't seen much info on the EVGA boards.

LLC is to compensate Vdroop. High levels result in Vboost. You have to find the sweet spot. Higher is not always better.
Quote:
Originally Posted by wingman99 View Post

What is Kaby Lake specification VID limit?

Don't know but considering that on average is around 1.2 V and lower on default, while some use 1.4 V to achieve 5 GHz overclock, stock clock speed and 1.4 V seems really high.
    
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post #1706 of 2909
Quote:
Originally Posted by dirtyred View Post

Why would he disable C-states on adaptive? The reason to use adaptive if to reduce power consumption. So does C-states enabled.
Don't think that 1.4 V default Vcore would have passed QC. But hey, it's Intel who's making Kaby Lake with crappy TIM so who knows...
spin up from idle with adaptive + c-states is very noticeable, serioudly if cores get parked. Besides, it's redundant since the voltage is already at the base vid value with no load.. what power are you saving at that point?
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post #1707 of 2909
Quote:
Originally Posted by dirtyred View Post

LLC is to compensate Vdroop. High levels result in Vboost. You have to find the sweet spot. Higher is not always better.
Don't know but considering that on average is around 1.2 V and lower on default, while some use 1.4 V to achieve 5 GHz overclock, stock clock speed and 1.4 V seems really high.
What is the VID with maximum Turbo boost at 4.5GHz running prime95 using default voltage?
Edited by wingman99 - 4/7/17 at 4:33pm
post #1708 of 2909
Quote:
Originally Posted by Jpmboy View Post

fully defeating vdroop with LLC is not necessarily the best conditions for a 24/7 cpu OC. Droop is there for a specific reason - which you will not detect/notice with any OS-based. Vdroop is a friend to your cpu.

I found that I can lower my temps by keeping a lower LLC. My cpu runs at 4.8GHz with Vcore set at 1.21V in the bios. Under load, it runs at 1.65V with LLC 3. If I raise the LLC up to 5 so the Vcore is at 1.21V under load, then the core temps raise up by ~4C. If I try to lower the Vcore in the bios below 1.21V, the cpu becomes unstable.
 
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post #1709 of 2909
Quote:
Originally Posted by wingman99 View Post

What is the VID with maximum Turbo boost at 4.5GHz running prime95 using default voltage?

Loaded optimized defaults in UEFI, VID is 1.194 V while Vcore is around 1.152-1.184 V but mostly around 1.168 V. Seems like it doesn't matter if using 4 or 8 threads, neither FFT size or if it's in-place in Prime95. For some reason turbo boost doesn't reach 4.5 GHz under Prime95 v26.6 or Hyper Pi. It does however in 3DMark or XTU.



Btw, I just found out after 5 hours of stress testing, rebooting, adjusting settings in UEFI and repeating the whole process over and over why is RealBench (LuxMark) crashing around the 2 minute mark. It had nothing to do with my settings. It had to do with HWiNFO and Gigabyte Xtreme Gaming Engine running. Closed HWiNFO and disabled monitoring in GXGE while keeping my GPU overclocked to 2025/9400 MHz and 15 minute stress test passed without crashing. Seems like some folks on ASUS ROG forums experienced the similar crashes.
    
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post #1710 of 2909
Quote:
Originally Posted by dirtyred View Post

Loaded optimized defaults in UEFI, VID is 1.194 V while Vcore is around 1.152-1.184 V but mostly around 1.168 V. Seems like it doesn't matter if using 4 or 8 threads, neither FFT size or if it's in-place in Prime95. For some reason turbo boost doesn't reach 4.5 GHz under Prime95 v26.6 or Hyper Pi. It does however in 3DMark or XTU.

Thanks for doing that test.smile.gif My VID is much higher on my i5 VID=1.283v Vcore=1.260v Max, running Prime 95 at 4.2GHz optimized default settings except multiplier.
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