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Intel Skylake Owner's Club - Page 178

post #1771 of 1961
Quote:
Originally Posted by TK421 View Post

Does any of you run 6700K able to undervolt + slight overclock and keep the power consumption below 95w?

What kind of overclock is expected if the chip is undervolted?
You know you can just OC it to 4GHz+ enable C states and set a power limit of 95W? The CPU will clock down itself when the power limit is reached. By default those limits are set to like 1000W and not to the Intel advertised average consumption of 95W or so. You want it to max out on 95W you can set it so.
post #1772 of 1961
Quote:
Originally Posted by JackCY View Post

You know you can just OC it to 4GHz+ enable C states and set a power limit of 95W? The CPU will clock down itself when the power limit is reached. By default those limits are set to like 1000W and not to the Intel advertised average consumption of 95W or so. You want it to max out on 95W you can set it so.

But if I don't want to throttle the CPU using c-states, I must manually dial the overclock + undervolt to not break 95w?
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post #1773 of 1961
Wut? I don't know if you need C states on, but personally I have all the Intel features turned on, speed step, turbo, c states, ... so the CPU goes up and down in speed and voltages as is needed by itself instantly.
Simply set the PL1 and PL2 and current limit. Should have similar names on Skylake. It is also shown in latest HWinfo and all the XTUs I've had when the limit is reached.
I use about 200W personally as that is what my cooler can handle and to protect my CPU in case I happen to run some craziness like linpack for what ever reason. Normally I don't get any power limitation but sure if you set max at 95W you're gonna get it all the time when doing something intensive.
post #1774 of 1961
Quote:
Originally Posted by JackCY View Post

Wut? I don't know if you need C states on, but personally I have all the Intel features turned on, speed step, turbo, c states, ... so the CPU goes up and down in speed and voltages as is needed by itself instantly.
Simply set the PL1 and PL2 and current limit. Should have similar names on Skylake. It is also shown in latest HWinfo and all the XTUs I've had when the limit is reached.
I use about 200W personally as that is what my cooler can handle and to protect my CPU in case I happen to run some craziness like linpack for what ever reason. Normally I don't get any power limitation but sure if you set max at 95W you're gonna get it all the time when doing something intensive.

So if something consumes more than 95w the CPU will throttle based on bios tdp limitation?
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post #1775 of 1961
Yeah. At least that's how it works on my DC with all the CPU functions enabled, I think it shouldn't matter if you enable them but it may, they are enabled by default but some people disable them to OC.

For Skylake, page 82:
Quote:
5.1.3
Intel
®
Turbo Boost Technology
2.0 Power Control
Illustration of Intel
®
Turbo Boost Technology 2.0 power control is shown in the
following sections and figures. Multiple
controls operate simultaneously allowing
customization for multiple system thermal and power limitations. These controls allow
for turbo optimizations within system constraints and are accessible using MSR, MMIO,
or PECI interfaces.
5.1.3.1
Package Power Control
The package power control settings of PL1, PL
2, PL3, PL4 and Tau allow the designer to
configure Intel
®
Turbo Boost Technology 2.0 to ma
tch the platform power delivery and
package thermal solution limitations.
• Power Limit 1 (PL1): A threshold for average power that will not exceed -
recommend to set to equal TDP power. PL1
should not be set higher than thermal
solution cooling limits.
• Power Limit 2 (PL2): A threshold that if exceeded, the PL2 rapid power limiting
algorithms will attempt to limit the spike above PL2.
• Power Limit 3 (PL3): A threshold that if exceeded, the PL3 rapid power limiting
algorithms will attempt to limit the duty
cycle of spikes above PL3 by reactively
limiting frequency. This is an optional setting
• Power Limit 4 (PL4): A limit that will not be exceeded, the PL4 power limiting
algorithms will preemptively limit frequency to prevent spikes above PL4.
• Turbo Time Parameter (Tau): An averaging constant used for PL1 exponential
weighted moving average (EWMA) power calculation.
Note:
Implementation of Intel
®
Turbo Boost Technology 2.0 on
ly requires configuring PL1,
PL1 Tau and PL2.
Note:
PL3 and PL4 are disabled by default.

There is a way to click to the PDFs on ark but I had to search it again, it's kinda tricky hidden.

For my DC it goes this way and should be same for SL: PL1 long duration power limit, PL2 short duration power limit = spike = immediate limit, Tau = time after which PL1 is used when power goes over it.
SL has also PL3 and 4 I think these are new and seem to be disabled by default but you can set them if you want.
Edited by JackCY - 6/7/16 at 10:52am
post #1776 of 1961
Quote:
Originally Posted by JackCY View Post

Yeah. At least that's how it works on my DC with all the CPU functions enabled, I think it shouldn't matter if you enable them but it may, they are enabled by default but some people disable them to OC.

For Skylake, page 82:
There is a way to click to the PDFs on ark but I had to search it again, it's kinda tricky hidden.

For my DC it goes this way and should be same for SL: PL1 long duration power limit, PL2 short duration power limit = spike = immediate limit, Tau = time after which PL1 is used when power goes over it.
SL has also PL3 and 4 I think these are new and seem to be disabled by default but you can set them if you want.

I'll have to see if those options are actually available or not.



As for DIY-CPU binning, how would one go to "bin" multiple CPUs from micro center?
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post #1777 of 1961
Well I have PL1, PL2, the time delay setting and also an ampere limit on my Z97. They all work like a charm as they should. Unless your board's maker skipped and cut down the UEFI these should be there and more.
Binning CPUs is not really a viable option unless you want to piss off some shop and return 9 out of 10 CPUs to them in open boxes just because law allows you. You could sell the undesirable chips but you will take a loss on that.
If you want a binned CPU buy one from a shop that sells them binned.

How? You bench each of them at some OC settings or have a software that finds the highest OC possible withing the set limits.
post #1778 of 1961
Does anyone know how much of an improvement an i5 6600K has over an A10-7850K in CPU only tasks? I know it's massive, but I'd like a number, cause I pounced on an i5 6600K for $170 on another forum. Mostly pounced on it to relieve the bottleneck the Radeon R9 Nano is facing.
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post #1779 of 1961
Run a bench on your two systems and see for yourself. wink.gif
Otherwise dig out some reviews.
post #1780 of 1961
I know I'm bottlenecked cause I got 8145 on the FFXIV bench with a Radeon R9 Nano, hopefully with the i5, I can get it up to 10000 or so... as the i5 6600K is almost double the performance of the A10-7850K based on AnandTech benchies.

For comparison, the average among 7950s and 7970s is 7,299. A Nano performs much better than 10% above a 7970. http://ff14bench.info/benchmark/compare_en.html

Be aware, I'm using the exploration benchmark, not the character creation benchmark. However, I probably should run the character creation benchmark tonight.
Edited by Sonikku13 - 6/10/16 at 7:42am
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