Intel releases 35W Intel Core i9-11900T and Core i7-11700T Rocket lake procs (with 115W PL2)

by Hilbert Hagedoorn on: 04/27/2021 09:50 AM | source: hardware.info | 50 comment(s)

Next to K (unlocked) and F (disabled iGPU) models, Intel also has the T series (low energy) processors. And for the Rocket generation that means low power (well somewhat) 35W TDP rated processors.

Intel launched a duo of 35W models initially, based on Rocket Lake. The limited TDP means a hefty restriction on power consumption, clock speeds, and thus performance. the two parts listed right now are the Core i9-11900T and Core i7-11700T. Both chips offer 8 cores and 16 threads. The clock speeds differ: the i9 offers a 1.5 GHz axis base and can go up to 4.9 GHz. The i7 goes for 1.4 / 4.6 GHzHowever there will be more SKU's of course:

Core i9-11900T
Core i7-11700T
Core i5-11600T
Core i5-11500T
Core i5-11400T

Interesting fact, these are 35W ratings. And I have been stating for a while now that TDP means jack these days the manufacturers do with ti as they please. The procs have a PL1 state of 35W and wait for it .... a 115W PL2 state. Interestingly enough the processors are a notch more expensive than the regular versions. The i9 is sold for about 450 euros, the i7 about 100 euros less.

	Core Arch	Base	All-core	Single-core	Cores/threads	L3	TDP	OC	DRAM	GPU	EUR
Core i9-11900K	Cypress Cove	3.5GHz	4.8GHz	5.3GHz	8/16	16MB	125W	Yes	DDR4-3200	UHD 750	548
Core i9-11900KF	Cypress Cove	3.5GHz	4.8GHz	5.3GHz	8/16	16MB	125W	Yes	DDR4-3200	-	521
Core i9-11900	Cypress Cove	2.5GHz	4.7GHz	5.2GHz	8/16	16MB	65W	No	DDR4-3200	UHD 750	446
Core i9-11900F	Cypress Cove	2.5GHz	4.7GHz	5.2GHz	8/16	16MB	65W	No	DDR4-3200	-	429
Core i9-11900T	Cypress Cove	1.5GHz	3.7GHz	4.9GHz	8/16	16MB	35W	No	DDR4-3200	UHD 750	446
Core i7-11700K	Cypress Cove	3.6GHz	4.6GHz	5GHz	8/16	16MB	125W	Yes	DDR4-3200	UHD 750	406
Core i7-11700KF	Cypress Cove	3.6GHz	4.6GHz	5GHz	8/16	16MB	125W	Yes	DDR4-3200	-	380
Core i7-11700	Cypress Cove	2.5GHz	4.4GHz	4.9GHz	8/16	16MB	65W	No	DDR4-3200	UHD 750	328
Core i7-11700F	Cypress Cove	2.5GHz	4.4GHz	4.9GHz	8/16	16MB	65W	No	DDR4-3200	-	303
Core i7-11700T	Cypress Cove	1.4GHz	3.6GHz	4.6GHz	8/16	16MB	35W	No	DDR4-3200	UHD 750	328
Core i5-11600K	Cypress Cove	3.9GHz	4.6GHz	4.9GHz	6/12	12MB	125W	Yes	DDR4-3200	UHD 750	266
Core i5-11600KF	Cypress Cove	3.9GHz	4.6GHz	4.9GHz	6/12	12MB	125W	Yes	DDR4-3200	-	241
Core i5-11600	Cypress Cove	2.8GHz	4.3GHz	4.8GHz	6/12	12MB	65W	No	DDR4-3200	UHD 750	216
Core i5-11600T	Cypress Cove	1.7GHz	3.5GHz	4.1GHz	6/12	12MB	35W	No	DDR4-3200	UHD 750	216
Core i5-11500	Cypress Cove	2.7GHz	4.2GHz	4.6GHz	6/12	12MB	65W	No	DDR4-3200	UHD 750	195
Core i5-11500T	Cypress Cove	1.5GHz	3.4GHz	3.9GHz	6/12	12MB	35W	No	DDR4-3200	UHD 750	195
Core i5-11400	Cypress Cove	2.6GHz	4.2GHz	4.4GHz	6/12	12MB	65W	No	DDR4-3200	UHD 730	185
Core i5-11400F	Cypress Cove	2.6GHz	4.2GHz	4.4GHz	6/12	12MB	65W	No	DDR4-3200	-	160
Core i5-11400T	Cypress Cove	1.3GHz	3.3GHz	3.7GHz	6/12	12MB	35W	No	DDR4-3200	UHD 730	185
Core i3-10325	Skylake	3.9GHz	4.5GHz	4.7GHz	4/8	8MB	65W	No	DDR4-2666	UHD 630	157
Core i3-10305	Skylake	3.8GHz	4.3GHz	4.5GHz	4/8	8MB	65W	No	DDR4-2666	UHD 630	145
Core i3-10305T	Skylake	3GHz	3.7GHz	4GHz	4/8	8MB	35W	No	DDR4-2666	UHD 630	145
Core i3-10105	Skylake	3.7GHz	4.2GHz	4.4GHz	4/8	6MB	65W	No	DDR4-2666	UHD 630	124
Core i3-10105F	Skylake	3.7GHz	4.2GHz	4.4GHz	4/8	6MB	65W	No	DDR4-2666	-	99
Core i3-10105T	Skylake	3GHz	3.6GHz	3.9GHz	4/8	6MB	35W	No	DDR4-2666	UHD 630	124
Pentium Gold G6605	Skylake	4.3GHz	-	-	2/4	4MB	65W	No	DDR4-2666	UHD 630	87
Pentium Gold G6505	Skylake	4.2GHz	-	-	2/4	4MB	65W	No	DDR4-2666	UHD 630	76
Pentium Gold G6505T	Skylake	3.6GHz	-	-	2/4	4MB	35W	No	DDR4-2666	UHD 630	76
Pentium Gold G6405	Skylake	4.1GHz	-	-	2/4	4MB	65W	No	DDR4-2666	UHD 610	65
Pentium Gold G6405T	Skylake	3.5GHz	-	-	2/4	4MB	35W	No	DDR4-2666	UHD 610	65

The Series T

So many suffixes, A "K" means an unlocked processor. A "U" means the chip is designed for laptops and mobile devices, as "U" chips are Intel's "ultra-low-power" models. Where "F" means the chip has no built-in graphics processor the "T" means the chips are designed to use less power while also having less performance than the standard chips without any letters.

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Fox2232
Senior Member

Posts: 11809
Joined: 2012-07-20

#5907935 Posted on: 04/27/2021 09:15 AM

We can still power limit AMD's chips as we please. CPU then follows settings as closely as physically possible.
(It will not lower clock below lowest possible, and it will not decrease voltage below lowest possible. For example: 2700X has lowest clock 600MHz and Voltage 0.8V when using power limits to govern CPU.)

Side note, while Ryzen Master did not allow 2700X power limit under 70W, BIOS enables users to set even 15W.
(I did not try lower power limit than 15W as in that experiment series I was loading all cores with CB-R15. And 2700X 8C/16T under full load and 0.8V had 600MHz on all cores while eating actual 16.5W. Idling at 12W, which left very small space for actual single boosting. So experiment was over at that point for 2700X.)

ruthan
Senior Member

Posts: 482
Joined: 2016-05-24

#5907955 Posted on: 04/27/2021 10:38 AM

It as to have some switch to disable these power hungry mods and they should be off by default.. Is someone have good enough cooling ok, but this is killing whole low power cpu and easy to cool concept..

Kaarme
Senior Member

Posts: 2628
Joined: 2013-03-10

#5907963 Posted on: 04/27/2021 11:28 AM

It would be pretty funny to buy a low power 35W CPU on purpose, only to find out it regularly boosts up to well over 100W on the default settings. I'd understand 60W. Any more should require altering a setting in the bios.

Noisiv
Senior Member

Posts: 8050
Joined: 2010-11-16

#5907969 Posted on: 04/27/2021 12:35 PM

playing devils advocate:

Intel's TDP has always been defined from the manufacturer's viewpoint( ie TDP is the maximum power that one should be designing the system for), instead from end user or wattmeter's point of view.
Intel's TDP has always meant cooling strength required. It never meant power consumption. And certainly not short term power consumption.

Intel's PL2 is simply utilizing the fact that 35W cooler can safely dissipate 115 Watts of heat for Tau amount of seconds.

yeeeeman
Member

Posts: 52
Joined: 2010-06-21

#5907980 Posted on: 04/27/2021 01:58 PM

Yes, fully agree with you @Noisiv
So many naysayers. Intel is trying to squeeze as much performance as they can within the confinements that they have (old process).
I don't understand what is wrong with having a short burst of extra performance if the cooler and the physics behind it supports it.
If you have a super tiny case with very hot temperatures, obviously the CPU won't be able to do it, so it'll stay at lower wattages.

The fact that Intel went to 300W in the top K parts, yeah, that is a bit too much, but again, you can disable that via BIOS switch and stay under the designated TDP, if that is really what you want. But do understand that working with an older process that needs to be pushed so high (over 5Ghz) means you will have big power numbers.

AMD simply enjoys the benefits of using a better process, that isn't even their design or work. TSMC is the one to congratulate.

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