[PCWorld] Intel challenges AMD's Ryzen 3000 CPUs to take the Core i9-9900K's real-world gaming crown - Page 12 - Overclock.net - An Overclocking Community

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[PCWorld] Intel challenges AMD's Ryzen 3000 CPUs to take the Core i9-9900K's real-world gaming crown

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post #111 of 172 (permalink) Old 06-17-2019, 11:17 AM
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Quote: Originally Posted by WannaBeOCer View Post
That was in response to @ThrashZone

I can upload some screenshots this afternoon. It doesn't blue screen or crash but a few cores start to throw errors after about 6 minutes. I always delid my Intel CPUs. I forget if it was Steve from Gamernexus or JayzTwoCents but the IHS on the SkyLake-X chips are horribly convex.

https://youtu.be/EALCvMxvLyA
Ahh, you are running delided, that makes it sound a little more reasonable thermally. The 255 watts at 1.5v though sounds like you are throttling a lot.


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post #112 of 172 (permalink) Old 06-17-2019, 11:25 AM
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Quote: Originally Posted by WannaBeOCer View Post
I run Prime95 to stress AVX stability. Cinebench R20 does use AVX and I can also tell since my CPU runs at 5.3Ghz for the duration of the benchmark. You can also see my 5.3Ghz AVX results here: https://www.overclock.net/forum/21-b...scores-32.html
Hi,
Many have stated no avx drop and we do have avx control so I'll have to say no avx on R20-R15 at all and if it does it's no where enough to matter.
I don't use prime anyway.

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post #113 of 172 (permalink) Old 06-17-2019, 11:33 AM - Thread Starter
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Quote: Originally Posted by DNMock View Post
Ahh, you are running delided, that makes it sound a little more reasonable thermally. The 255 watts at 1.5v though sounds like you are throttling a lot.
The cinebench result is scoring correctly for a 5.3Ghz 9900k so I don't think it's throttling.

KitGuru is also getting the same at 5Ghz.

https://www.kitguru.net/components/l...ighty-price/6/

Quote: Originally Posted by ThrashZone View Post
Hi,
Many have stated no avx drop and we do have avx control so I'll have to say no avx on R20-R15 at all and if it does it's no where enough to matter.
I don't use prime anyway.
I am running a 9900k on a z170 board with the bios 2202 which was released before Kaby Lake so it doesn't have an AVX offset option but for some reason it's setting a 100mhz offset. I do not have a way to control it unless I port a 370 or 390 bios over which I do not know how to do.

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post #114 of 172 (permalink) Old 06-17-2019, 12:06 PM
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Quote: Originally Posted by WannaBeOCer View Post
The cinebench result is scoring correctly for a 5.3Ghz 9900k so I don't think it's throttling.

KitGuru is also getting the same at 5Ghz.

https://www.kitguru.net/components/l...ighty-price/6/



I am running a 9900k on a z170 board with the bios 2202 which was released before Kaby Lake so it doesn't have an AVX offset option but for some reason it's setting a 100mhz offset. I do not have a way to control it unless I port a 370 or 390 bios over which I do not know how to do.
No doubt the 9900k is a good chip. I'm just questioning the numbers since something doesn't add up right.

If a 9900K on a z390 board is pulling 250 watts @ 5.0 with 1.33 Volts on AVX enabled Prime95, I have a hard time believing a 9900k on a Z170 board is only pulling 255 watts @ 5.3ghz at 1.5 volts.


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post #115 of 172 (permalink) Old 06-17-2019, 01:19 PM
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Quote: Originally Posted by DNMock View Post
No doubt the 9900k is a good chip. I'm just questioning the numbers since something doesn't add up right.

If a 9900K on a z390 board is pulling 250 watts @ 5.0 with 1.33 Volts on AVX enabled Prime95, I have a hard time believing a 9900k on a Z170 board is only pulling 255 watts @ 5.3ghz at 1.5 volts.
Especially since voltage is an exponential increase of power in the power draw equation. It is the largest contributing factor to wattage draw. Then you throw the higher frequency on top of that? Ya thats not realistic numbers. Even if you consider efficiency differences between VRMs, its just not going to make up that kind of difference.
Either A) its throttling and trying to maintain a 250w draw, or B) something is not reading right.

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post #116 of 172 (permalink) Old 06-17-2019, 01:30 PM
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in this case its pretty simple math, voltage x amperage equals watts, and no way 1.5 volts pulls less power then 1.33 volts at the same amperage.
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post #117 of 172 (permalink) Old 06-17-2019, 01:41 PM
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Is it possible that one cpu pulls 188 amps and the other only pulls 170 amps? I've never actually paid much attention to these numbers so I have no idea how much the amperage varies from board to board and cpu to cpu.

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post #118 of 172 (permalink) Old 06-17-2019, 01:43 PM
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Quote: Originally Posted by bigjdubb View Post
Is it possible that one cpu pulls 188 amps and the other only pulls 170 amps? I've never actually paid much attention to these numbers so I have no idea how much the amperage varies from board to board and cpu to cpu.
Yeah. Very possible. One can be high leakage.

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post #119 of 172 (permalink) Old 06-17-2019, 02:16 PM
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Quote: Originally Posted by tyvar View Post
in this case its pretty simple math, voltage x amperage equals watts, and no way 1.5 volts pulls less power then 1.33 volts at the same amperage.
Its Power (watts) = amperage * capacitance * voltage squared * frequency

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post #120 of 172 (permalink) Old 06-17-2019, 02:38 PM
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Quote: Originally Posted by EniGma1987 View Post
Its Power (watts) = amperage * capacitance * voltage squared * frequency
could please you expound upon that? tbh, i think you are both correct. it may help if i tell you that when i have work with residential/industrial electric (motors, amplifiers) ohm's law works out fine, but when working with a cpu/gpu i know power goes up linearly with frequency but exponentially with voltage.

links work.
E:
i think the capacitance is throwing me off.

E: or did i sorta find it?
Quote:
The main power draw in CPU's is caused by the charging and discharging of capacitors during calculations. These electrical charges are dissipated in resistors, turning the associated electrical energy into heat.

Remember the golden rule of statistics: A personal sample size of one is a sufficient basis upon which to draw universal conclusions.
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Last edited by looniam; 06-17-2019 at 03:19 PM.
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