PrimeGrid
Please visit donation page to help the project cover running costs for this month

Toggle Menu

Join PrimeGrid

Returning Participants

Community

Leader Boards

Results

Other

drummers-lowrise

Advanced search

Message boards : Aggie The Pew message board : Turbo Boost

Author Message
Profile Gary Craig
Volunteer tester
Avatar
Send message
Joined: 30 Dec 09
Posts: 3165
ID: 52890
Credit: 928,362,354
RAC: 1,188,405
Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,614,439)Cullen LLR Ruby: Earned 2,000,000 credits (2,440,687)ESP LLR Turquoise: Earned 5,000,000 credits (5,738,876)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,292,626)PPS LLR Turquoise: Earned 5,000,000 credits (7,513,730)PSP LLR Turquoise: Earned 5,000,000 credits (5,000,433)SoB LLR Turquoise: Earned 5,000,000 credits (8,270,987)SR5 LLR Turquoise: Earned 5,000,000 credits (5,040,727)SGS LLR Ruby: Earned 2,000,000 credits (3,333,837)TRP LLR Jade: Earned 10,000,000 credits (12,547,399)Woodall LLR Ruby: Earned 2,000,000 credits (2,282,622)321 Sieve Silver: Earned 100,000 credits (205,087)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,143,068)PPS Sieve Double Gold: Earned 500,000,000 credits (524,569,437)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Sapphire: Earned 20,000,000 credits (23,053,782)GFN Double Bronze: Earned 100,000,000 credits (174,959,306)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 130187 - Posted: 5 Jun 2019 | 23:56:22 UTC

My 9900K has stock settings in BIOS except I did turn HT off. I use "Core Temp" to monitor the CPU. Stock clock is 3.6 GHz, but I see it jump to 4.5 or even 4.7 briefly. The temps usually hover around 80C but when the boost hits they briefly jump to about 90C. This is just for a second and temps return to normal quickly when the clock drops back down.

My first question: I'm running SoB tasks multi-threaded across all 8 cores. I thought turbo boost was supposed to kick in only when there is spare processing power and some thermal headroom. I can't imagine that is the case running MT LLR tasks. So why would boost activate?

Second question: is this thermal up-and-down going to be harmful long term? Performance wise it seems helpful to let turbo boost do its thing as you'd get a "blended" higher clock rate over the life of a task without having to bump up the multiplier in BIOS which would make it run hotter all the time, but it would be "smoother".

I'll also note that I've only noticed this recently when running SoB. I don't think it was doing it during the TRP challenge or before that when I was running short tasks. Maybe cache effects because the tests are so huge? I admit I don't check it that often. I'm also running GFN-DYFL on the GPU which uses about 10% of one CPU core.

Thanks rats.
Gary++

Profile Michael GoetzProject donor
Volunteer moderator
Project administrator
Project scientist
Avatar
Send message
Joined: 21 Jan 10
Posts: 12911
ID: 53948
Credit: 194,837,816
RAC: 205,774
The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Turquoise: Earned 5,000,000 credits (5,009,577)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Turquoise: Earned 5,000,000 credits (5,962,127)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,221,148)SR5 LLR Turquoise: Earned 5,000,000 credits (8,293,415)SGS LLR Ruby: Earned 2,000,000 credits (2,012,222)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Turquoise: Earned 5,000,000 credits (5,046,112)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,098,088)GFN Emerald: Earned 50,000,000 credits (65,591,694)PSA Jade: Earned 10,000,000 credits (12,404,447)
Message 130188 - Posted: 6 Jun 2019 | 0:13:03 UTC - in response to Message 130187.

Don't forget that the CPU is doing things for on a microsecond (or even nanosecond) timescale and Core Temp is probably updating once a second. You're seeing (literally) a millionth (or less) of the information about what is occurring inside.
____________
Please do not PM me with support questions. Ask on the forums instead. Thank you!

My lucky number is 75898524288+1

darkclownProject donor
Send message
Joined: 3 Oct 06
Posts: 212
ID: 3605
Credit: 351,391,151
RAC: 1,004,954
Discovered 2 mega primes321 LLR Ruby: Earned 2,000,000 credits (2,164,042)Cullen LLR Ruby: Earned 2,000,000 credits (2,136,460)ESP LLR Ruby: Earned 2,000,000 credits (3,664,189)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,313,234)PPS LLR Jade: Earned 10,000,000 credits (12,111,616)PSP LLR Ruby: Earned 2,000,000 credits (2,510,429)SoB LLR Ruby: Earned 2,000,000 credits (2,661,947)SR5 LLR Ruby: Earned 2,000,000 credits (3,172,649)SGS LLR Ruby: Earned 2,000,000 credits (2,024,276)TPS LLR (retired) Bronze: Earned 10,000 credits (14,608)TRP LLR Ruby: Earned 2,000,000 credits (2,794,097)Woodall LLR Ruby: Earned 2,000,000 credits (2,779,003)321 Sieve Sapphire: Earned 20,000,000 credits (20,953,539)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,370,445)PPS Sieve Sapphire: Earned 20,000,000 credits (26,872,301)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Gold: Earned 500,000 credits (718,547)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,027,562)AP 26/27 Jade: Earned 10,000,000 credits (18,817,997)GFN Sapphire: Earned 20,000,000 credits (26,871,754)PSA Double Silver: Earned 200,000,000 credits (204,420,780)
Message 130189 - Posted: 6 Jun 2019 | 2:03:31 UTC

I found that running my i5-9600K with Turbo Boost on was playing havoc at the boosted freqs (4.5Ghz+) with the temps, and giving me a bunch of errors/inconclusive results. Once i disabled Turbo Boost, smooth sailing. Sure, it's a lower clock frequency, but cooler and seems more stable with LLR.
____________
My lucky #: 60133106^131072+1 (GFN 17-mega)

mackerelProject donor
Volunteer tester
Avatar
Send message
Joined: 2 Oct 08
Posts: 2208
ID: 29980
Credit: 333,862,334
RAC: 162,442
Discovered 2 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 5 primes in the 2019 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,124,499)Cullen LLR Turquoise: Earned 5,000,000 credits (5,149,818)ESP LLR Turquoise: Earned 5,000,000 credits (6,454,573)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,122,074)PPS LLR Sapphire: Earned 20,000,000 credits (47,729,555)PSP LLR Jade: Earned 10,000,000 credits (10,128,604)SoB LLR Jade: Earned 10,000,000 credits (17,319,914)SR5 LLR Jade: Earned 10,000,000 credits (18,479,395)SGS LLR Turquoise: Earned 5,000,000 credits (6,702,766)TPS LLR (retired) Bronze: Earned 10,000 credits (34,130)TRP LLR Jade: Earned 10,000,000 credits (15,154,737)Woodall LLR Turquoise: Earned 5,000,000 credits (5,715,464)321 Sieve Turquoise: Earned 5,000,000 credits (8,326,385)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,383,853)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,626,419)PPS Sieve Emerald: Earned 50,000,000 credits (74,140,875)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,293,882)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,012,757)AP 26/27 Sapphire: Earned 20,000,000 credits (21,918,894)GFN Sapphire: Earned 20,000,000 credits (48,107,585)PSA Ruby: Earned 2,000,000 credits (2,939,755)
Message 130192 - Posted: 6 Jun 2019 | 7:41:51 UTC

Short answer: it's complicated

My short-ish answer:
Intended Intel CPUs behaviour is to hit rated TDP at base clock only. It may exceed it for short times depending on power, thermal and other limits. This is generally the case for mobile devices and mass produced desktops from the likes of Dell etc.

If you buy a motherboard and build your own system, generally speaking they ignore the "for short times" part of the limiting and will boost continuously as long as thermal and some other limits allow. It may operate above TDP indefinitely.

Long answer: https://www.anandtech.com/show/13544/why-intel-processors-draw-more-power-than-expected-tdp-turbo

Profile ILW8Project donor
Send message
Joined: 19 Sep 14
Posts: 29
ID: 366225
Credit: 395,111,605
RAC: 877,568
Found 4 primes in the 2019 Tour de Primes321 LLR Amethyst: Earned 1,000,000 credits (1,093,925)Cullen LLR Ruby: Earned 2,000,000 credits (2,726,858)ESP LLR Ruby: Earned 2,000,000 credits (3,862,354)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,072,438)PPS LLR Turquoise: Earned 5,000,000 credits (7,509,381)PSP LLR Gold: Earned 500,000 credits (960,694)SoB LLR Ruby: Earned 2,000,000 credits (4,856,449)SR5 LLR Amethyst: Earned 1,000,000 credits (1,597,857)SGS LLR Amethyst: Earned 1,000,000 credits (1,871,267)TRP LLR Ruby: Earned 2,000,000 credits (2,137,075)Woodall LLR Ruby: Earned 2,000,000 credits (2,341,684)321 Sieve Sapphire: Earned 20,000,000 credits (21,058,719)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (29,540,183)PPS Sieve Double Bronze: Earned 100,000,000 credits (106,061,773)AP 26/27 Jade: Earned 10,000,000 credits (16,119,441)GFN Emerald: Earned 50,000,000 credits (80,146,588)PSA Double Bronze: Earned 100,000,000 credits (111,158,291)
Message 130193 - Posted: 6 Jun 2019 | 10:08:23 UTC

With most default motherboard settings, given the proper cooling and good power delivery, quite a few CPUs (including the 9900k) will still be able to turbo past its base clock.

If your CPU is running at base clock most of the times and occasionally spike to higher frequencies, I would assume that it's because some kind of limit parameter (thermal, power, or otherwise) sometimes decays enough and allows the CPU to turbo up for a moment, but the moment it turbos, it reaches a limit and immediately gets throttled.


As for the harmfulness of the temperature changes... I can only speculate that it shouldn't be much of an issue.
Consider this with laptops: during a normal workload (text editing, web browsing, starting and closing softwares), the CPU temperature varies by quite a bit because those activities do not put a constant and equal load on the CPU.

(This happens opening firefox and loading reddit on a laptop)

Profile Gary Craig
Volunteer tester
Avatar
Send message
Joined: 30 Dec 09
Posts: 3165
ID: 52890
Credit: 928,362,354
RAC: 1,188,405
Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,614,439)Cullen LLR Ruby: Earned 2,000,000 credits (2,440,687)ESP LLR Turquoise: Earned 5,000,000 credits (5,738,876)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,292,626)PPS LLR Turquoise: Earned 5,000,000 credits (7,513,730)PSP LLR Turquoise: Earned 5,000,000 credits (5,000,433)SoB LLR Turquoise: Earned 5,000,000 credits (8,270,987)SR5 LLR Turquoise: Earned 5,000,000 credits (5,040,727)SGS LLR Ruby: Earned 2,000,000 credits (3,333,837)TRP LLR Jade: Earned 10,000,000 credits (12,547,399)Woodall LLR Ruby: Earned 2,000,000 credits (2,282,622)321 Sieve Silver: Earned 100,000 credits (205,087)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,143,068)PPS Sieve Double Gold: Earned 500,000,000 credits (524,569,437)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Sapphire: Earned 20,000,000 credits (23,053,782)GFN Double Bronze: Earned 100,000,000 credits (174,959,306)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 130269 - Posted: 9 Jun 2019 | 0:43:44 UTC

Sounds like (and looks like, per more frequent monitoring), that things are "normal". Ambient temps are up today but the cpu cooling seems to be doing a good job with that. To address one point, I have not experienced any "error" or "invalid" tasks.

I'm not going to worry about it.

Gary

Post to thread

Message boards : Aggie The Pew message board : Turbo Boost

[Return to PrimeGrid main page]
DNS Powered by DNSEXIT.COM
Copyright © 2005 - 2019 Rytis Slatkevičius (contact) and PrimeGrid community. Server load 1.54, 1.89, 1.95
Generated 14 Oct 2019 | 1:56:42 UTC