Intel Readies Energy-efficient 35-Watt Core i9-9900T Processor

[Vayra86]

This CPU is made mainly for OEMs and they will know how to tune it to keep under certain limit they need (be it 35W or 45W). Don't worry too much.

Sorry what. Razer would like a word with you. And Asus. And GB. And MSI. And literally everybody else.

 

[notb]

Huh, the 2500U in my HP Envy X360 is pretty efficient at 15W. According to HWINFO64 it doesnt go over 12W even when playing games. Though I admit the battery life isn't as great as I hoped for when in use. Something I've heard a lot about with the Ryzen mobile low power parts. Thinking it could be a software firmware issue?

You're spot on with the battery life issue.
In a mobile CPU it is important how low the power draw can go and this is not great in Ryzen, because the IF sucks a lot just to keep the thing going.
Moreover, the power management seems not to be that great, because Zen-powered notebooks lag behind Intel in both idle and load battery life.

I had a 1700 on launch and in full load it was 3.3 GHz all core and stuck pretty close to the 65W TDP: around 70-75W peak in Prime95 iirc. My friend has a Laptop with a socketed 2700 and at stock he is almost bang on 65W at 3.4GHz all core.

How do you measure power draw?

Sorry what. Razer would like a word with you. And Asus. And GB. And MSI. And literally everybody else.

No offense, but Razer, GB and MSI are so tiny that most PC owners don't know these brands exist. Asus is what... 5th? 6th?
-T CPUs are basically purpose-built for SFF desktops of the major OEMs. They will know how to setup them. Seriously, don't worry so much.

 

[ArbitraryAffection]

You're spot on with the battery life issue.
In a mobile CPU it is important how low the power draw can go and this is not great in Ryzen, because the IF sucks a lot just to keep the thing going.
Moreover, the power management seems not to be that great, because Zen-powered notebooks lag behind Intel in both idle and load battery life.

How do you measure power draw?

No offense, but Razer, GB and MSI are so tiny that most PC owners don't know these brands exist. Asus is what... 5th? 6th?
-T CPUs are basically purpose-built for SFF desktops of the major OEMs. They will know how to setup them. Seriously, don't worry so much.

Hwinfo64 and a wattage meter at the wall.

 

[notb]

Hwinfo64 and a wattage meter at the wall.

And what did the wattmeter say?

 

[Yves-Marie]

3.4ghz is non-boost speed? so at 3.4ghz it should run at 35 watts if turn off intel speedstep. honestly if the price is right, that is still a great gaming chip. my i7-7820hk cpu only runs at 2.9ghz due to overheating issues otherwise, and it plays all games on my laptop with gtx 1070 at 100hz 100 fps on medium ot high settings.

i have it underclocked to 36 watts as well. thats a lot of energy savings and most games won't be able to tell the difference

Hello,
I'm completly new to this. How do you measure the 36 w ? Thanks ! Yves-Marie

 

[Space Lynx]

Hello,
I'm completly new to this. How do you measure the 36 w ? Thanks ! Yves-Marie

HWINFO

 

[Aquinus]

You know, don't treat all core boost speeds as a situation that will occur every time under any type of load. I have a laptop with a mobile i7 chip in it with 4Ghz boost (i7 8550u) and while I'll rarely see that on all 4 cores, it's usually not sustained. Usually either thermal limits or power limits will pull it down. With that said though, you would be surprised at how many loads the laptop can take (that don't use all the cores,) that will perform as well as my 3930k.

The bottom line is that this CPU is tuned for lower power draw and it won't boost the same way as a 95w or 130w part.