Doubt about Intel Core i9-9900T tdp limit

[Leoplate25]

Hi, a friend of mine is giving me an ES of the 9900T (1.7ghz and 3.8ghz turbo) and i have a couple of questions:

1) Can i set the long and short duration package power limit to said 200w so i won't have power throttling?
2) Will this reduce the lifespan of the chip?
3) Should i set the package power time window to its maximum of 127 or should i put less?
4) Can the MCE be enabled in this locked chip?

I asked these because i saw when this cpu reached its tdp it throttled its frequencies. Thanks in advance.

 

[Cowboystrekk]

Here you can see a test of the 8700t and performance with and without tdp-limit: https://www.computerbase.de/2018-06...est-coffee-lake/2/#abschnitt_tests_in_spielen

Without the 35W limit it behaves like a i7 8700 Vanilla.

The ES 9900T is a slower Version of the 9900T. What the SC and MC-speeds are with and without TDP-limit I have no idea since it`s not listed. In the 9900K-analysis With a 95W-tdp in Place it still boosted to 5GHz on SC, but MC was much slower.

If I was you I would remove TDP-limit if possible and undervolt it With Throttlestop both lowering CPU core and CPU cache. That will lower temps quite a bit and longevity will probably be good

 

[Leoplate25]

Here you can see a test of the 8700t and performance with and without tdp-limit: https://www.computerbase.de/2018-06...est-coffee-lake/2/#abschnitt_tests_in_spielen

Without the 35W limit it behaves like a i7 8700 Vanilla.

The ES 9900T is a slower Version of the 9900T. What the SC and MC-speeds are with and without TDP-limit I have no idea since it`s not listed. In the 9900K-analysis With a 95W-tdp in Place it still boosted to 5GHz on SC, but MC was much slower.

If I was you I would remove TDP-limit if possible and undervolt it With Throttlestop both lowering CPU core and CPU cache. That will lower temps quite a bit and longevity will probably be good

Hi and thanks for your answer. Could you answer me my 2nd question and if you can tell me how to lower cpu cache because i have no idea, haha. Thanks again.

 

[TheMadDutchDude]

Longevity won’t be affected in any way, shape or form. Lowering voltages in ThrottleStop is not a good suggestion considering it can be done in the BIOS... software should never be used over the BIOS.

Furthermore, you can set the power limit to whatever you want. Set it to the max.. it’ll only use what it needs, which wouldn’t be more than about 100w at worst case loads.

 

[Cowboystrekk]

Hi and thanks for your answer. Could you answer me my 2nd question and if you can tell me how to lower cpu cache because i have no idea, haha. Thanks again.

In general lifespan Depends on 2 Things: Voltage and temperature. Unless you overvolt or have a really poor coolingsolution it will probably don`t matter much. In Throttlestop you can adjust the two separately. I would check out the throttlestop-guide: http://forum.notebookreview.com/threads/the-throttlestop-guide.531329/

Longevity won’t be affected in any way, shape or form. Lowering voltages in ThrottleStop is not a good suggestion considering it can be done in the BIOS... software should never be used over the BIOS.

Actually I have to disagree on that. With AMD I agree but from every Intel-setup I have used undervolting in bios only affects CPU core and NOT CPU cache. If you own a MB that can undervolt both CPU core and cache in bios seperately I agree With you wholeheartedly.

A quick comparison with my i5 8400 and the crappy Stock cooler:
- Stock consumption was 80W avg and temp 82C.
- Undervolting to -150mv in bios resulted in avg powerdraw of 69W in CB15 Multi for several runs, temp 76C.
- With Throttlestop and a -145mv core and -175mv cache avg consumption dropped to 58W and temp was 70C max.

Thing about CPU cache is that it often can be undervolted more than CPU core and it affects temps\consumption about the same.

 

[notb]

Longevity won’t be affected in any way, shape or form. Lowering voltages in ThrottleStop is not a good suggestion considering it can be done in the BIOS... software should never be used over the BIOS.

Exactly the opposite.
Everything should be changed from OS level - ideally using either a tool provided by mobo/cpu manufacturer or shipped within OS.

So you throw away risky ThrottleStop, you get Intel XTU and life becomes easy and BIOS-free(r).

 

[TheMadDutchDude]

Why do it via software when you can control it at the most basic level of the system and have it guaranteed to NOT be screwed up by software?

Fair enough about the cache voltage, but as far as I’m aware, they’re tied to the core voltage... hence why you can only control the core in the BIOS.

I remember the days where a certain piece of software would send your CPU to 2v upon clicking apply at whatever voltage, and you could kiss it goodbye.

 

[Leoplate25]

Hey, guys, should or shouldn't i touch the "package power time window"? Can you explain me what it does and how it works and what happens if i leave it on auto? Thanks in advance!

 

[notb]

Why do it via software when you can control it at the most basic level of the system and have it guaranteed to NOT be screwed up by software?

Because under normal circumstances you should not use BIOS too often. Software adds a safety layer that BIOS lacks.

[rant]
And honestly, it's 2019. BIOS should be minimal and clean - used for the essential stuff it really has to do (like on laptops and other OEM PCs).
Instead, fueled by overclocking and modding trends, DIY mobo BIOS turned into an UEFI monster that fits perfectly into the era of blinky RGB cases...
Who the f... needs mouse in BIOS?

I remember the days where a certain piece of software would send your CPU to 2v upon clicking apply at whatever voltage, and you could kiss it goodbye.

That's why you should use software made by CPU/mobo manufacturer. I've stressed that earlier.

 

[TheMadDutchDude]

That software was from a manufacturer. LOL.

 

[notb]

That software was from a manufacturer. LOL.

But in that case you're protected by warranty.

 

[TheMadDutchDude]

Not by Intel, you’re not.

It was the X58 days... but I rest my case.

 

[Leoplate25]

Hi, can you guys tell me if i should set the package power time window to its maximum of 127, should i put less, or should i leave it in auto?

 

[Vader]

If you set long and short package power limit to the same value then duration doesn't really matter

You could use Intel XTU, it is easier than BIOS and we can help better because we don't know how CPU parameters are listed in the BIOS but we know XTU.
"Turbo Boost Power Max" and "Turbo Boost Short Power Max" (and possibly Processor current Limit) are what you need to change.
Turbo Boost Power Max: this is your sustained package power, set it to the highest value you can, as long as it doesn't overwhelm you cooling solution. Test your temperatures with the included stress test.
Turbo Boost Short Power Max: this is an aditional power limit that can run for a limited time. If power value is the same as "Turbo Boost Power Max", then this feature becomes irrelevant. Only if i were limited by the cooler would i use this. Set it to a value 10% higher than "Turbo Boost Power Max" but don't modify the duration (Turbo Boost Power Time Window).
Processor Current Limit: only change this if you see current limit throttling during stress tests, that's it.

 

[Leoplate25]

If you set long and short package power limit to the same value then duration doesn't really matter

You could use Intel XTU, it is easier than BIOS and we can help better because we don't know how CPU parameters are listed in the BIOS but we know XTU.
"Turbo Boost Power Max" and "Turbo Boost Short Power Max" (and possibly Processor current Limit) are what you need to change.
Turbo Boost Power Max: this is your sustained package power, set it to the highest value you can, as long as it doesn't overwhelm you cooling solution. Test your temperatures with the included stress test.
Turbo Boost Short Power Max: this is an aditional power limit that can run for a limited time. If power value is the same as "Turbo Boost Power Max", then this feature becomes irrelevant. Only if i were limited by the cooler would i use this. Set it to a value 10% higher than "Turbo Boost Power Max" but don't modify the duration (Turbo Boost Power Time Window).
Processor Current Limit: only change this if you see current limit throttling during stress tests, that's it.

Thanks for the explanation! Really appreciate it!

 

[FoxHoundRA64]

"The ES 9900T is a slower Version of the 9900T"

Hello I have been searching for information regarding the ES 9900T and this is the only place that I have seen this information, is this absolutely true? Is there any way to get the ES version to the performance of a stock retail 9900T? What are the specifications of the ES version versus the retail version?

I am planning on using it with a high end ray tracing GPU and I am just hoping it can get the job done at good FPS. This will be my main gaming computer when installed, I purchased it on AliExpress. Thanks for the help and consideration! It has been a long time since I have been on this forum and I am excited to see whats up with the community. I do apologize for bringing this thread back from the dead but it is important information to know.

 

[Caring1]

Generally the ES versions are slower, but can also have limits removed that enable them to be faster.
It's the luck of the draw, you won't know until you try it.
The 9900T is a slower retail version of the 9900 and 9900K, it might match their base speeds with overclocking.

 

[Vader]

How would you overclock a 9900T though? Unless the ES comes unlocked, the only thing left to do is increase power limits