question about CPUs i7 6700k in bios vs i5 6600k

[Niklas_13]

So I am trying to figure out why my i7 6700K is @ 4.2 max in bios and my kids i5 6600K is only running at 3.6 min

we both have gigabyte mobos i5 6600K with a gigabyte Z170 gaming 3 the i7 6700k with a z170 gaming 7

both have the new F20 bios

seems like my turbo mode is not working and its at full spped or something

any help on this ?

 

[chemmajorp53]

Have you tried resetting the bios to factory default settings or clearing the CMOS? Your motherboard should have an option to turn off turbo mode, maybe it's changed for some reason. It's for sure not thermal throttling right?

 

[geofelt]

Turbo mode applies to one core when the cpu is not running full out.

Both processors are overclockable.
The i7-6700K hardly needs it.
The i5-6600K is leaving performance on the table if you do not overclock as the K is intended to do.

As of 10/11/2016
What percent can get an overclock at a somewhat sane 1.40v Vcore.

I5-6600K

4.9 14%
4.8 38%
4.7 67%
4.6 87%

I7-6700K
4.9 3%
4.8 19%
4.7 61%
4.6 95%

 

[Niklas_13]

Have you tried resetting the bios to factory default settings or clearing the CMOS? Your motherboard should have an option to turn off turbo mode, maybe it's changed for some reason. It's for sure not thermal throttling right?

I can reset the bios and see if that helps , I don't think it is throttling ( as I see it in the bios the i7 6700K should show 4.0 not 4.2 its not under any load so it shouldn't kick up the turbo to 4.2 right ?

 

[geofelt]

Start with resetting the bios to default.
Be careful because on some motherboards, selecting "optimized default" will apply an overclock setting.

 

[CompuTronix]

So I am trying to figure out why my i7 6700K is @ 4.2 max in bios and my kids i5 6600K is only running at 3.6 min ... any help on this?

The i7 6700K and i5 6600K do NOT have the same Base Frequency or Max Turbo Frequency specifications:

i7 6700K - Base Frequency 4.0 GHz, Max Turbo Frequency 4.2 GHz - http://ark.intel.com/products/88195/Intel-Core-i7-6700K-Processor-8M-Cache-up-to-4_20-GHz

i5 6600K Base Frequency 3.5 GHz, Max Turbo Frequency 3.9 GHz - http://ark.intel.com/products/88191/Intel-Core-i5-6600K-Processor-6M-Cache-up-to-3_90-GHz

CT

 

[Niklas_13]

So I am trying to figure out why my i7 6700K is @ 4.2 max in bios and my kids i5 6600K is only running at 3.6 min ... any help on this?

The i7 6700K and i5 6600K do NOT have the same Base Frequency or Max Turbo Frequency specifications:

i7 6700K - Base Frequency 4.0 GHz, Max Turbo Frequency 4.2 GHz - http://ark.intel.com/products/88195/Intel-Core-i7-6700K-Processor-8M-Cache-up-to-4_20-GHz

i5 6600K Base Frequency 3.5 GHz, Max Turbo Frequency 3.9 GHz - http://ark.intel.com/products/88191/Intel-Core-i5-6600K-Processor-6M-Cache-up-to-3_90-GHz

CT

Yes I know this the thing I am trying to figure out is why in my bios

my i7 6700K shows it running at 4.2 max not 4.0 base
my i5 6600k shows it running at 3.6 base not 3.9 max

 

[Niklas_13]

I try to reset bios still the same :/

 

[Niklas_13]

ok I run cpu-z on my i7 6700k in windows with nothing open its at 4.2 so I guess turbo boot is off ?

the i5 6600K is at 888mz

 

[geofelt]

If your 6700K shows 4.2, it is likely that the bios settings are set to run at a 42 multiplier always.

The 6600K at 888 is likely because speedstep has been set.
That will lower the multiplier to 8 or so when there is little to do.

For both, I suggest you do the following.

First, in windows under control panel/power options/select either balanced or high performance plan/change plan settings/change advanced power settings/
expand processor power management.
For minimum processor state, pick something like 5% Higher and you will run faster even with little load.
Make maximum processor state 100%


Then, you can overclock.
Leave all voltages on auto, including ram.
Gradually raise the multiplier for all cores from the default of 35 or 40 .
Stress test with an app like OCCT which has more normal instructions compared to prime95 or IBT.
OCCT will stop the test if it gets past 85c.
Monitor vcore. CPU-Z will do this. It is vcore that limits how high you can go with some degree of safety.
1.4 or so seems to be that number.
When you feel comfortable stop.
Under normal heavy usage, you will not reach any high limits.

Then In the bios, implement speedstep and adaptive voltage.
That will allow the cpu to reduce the multiplier and vcore when there is little to do.

I would leave the ram settings at 1.2v. This will be 2400 speed at best.
Higher does not buy you much and I think 1.35v impacts your level of overclock.

 

[Niklas_13]

If your 6700K shows 4.2, it is likely that the bios settings are set to run at a 42 multiplier always.

The 6600K at 888 is likely because speedstep has been set.
That will lower the multiplier to 8 or so when there is little to do.

For both, I suggest you do the following.

First, in windows under control panel/power options/select either balanced or high performance plan/change plan settings/change advanced power settings/
expand processor power management.
For minimum processor state, pick something like 5% Higher and you will run faster even with little load.
Make maximum processor state 100%


Then, you can overclock.
Leave all voltages on auto, including ram.
Gradually raise the multiplier for all cores from the default of 35 or 40 .
Stress test with an app like OCCT which has more normal instructions compared to prime95 or IBT.
OCCT will stop the test if it gets past 85c.
Monitor vcore. CPU-Z will do this. It is vcore that limits how high you can go with some degree of safety.
1.4 or so seems to be that number.
When you feel comfortable stop.
Under normal heavy usage, you will not reach any high limits.

Then In the bios, implement speedstep and adaptive voltage.
That will allow the cpu to reduce the multiplier and vcore when there is little to do.

I would leave the ram settings at 1.2v. This will be 2400 speed at best.
Higher does not buy you much and I think 1.35v impacts your level of overclock.

thanks I will try this , I have notice also that my gpu wont idle down ( seems my system is running at max all the time ) you gpu used to go down to now it stays at 1582 and in games up to 1904 its a gtx 1070