Quote from: NotebookMaster on April 25, 2022, 15:40:00
Lenovo had only used U series CPU's in their ultralights in the past and for some reason the tests are being done with the much more power hungry P series of Alder Lake CPUs. Battery life against a U series CPU (which is better suited to an ultralight) will be similar if not better.

Intel 11th gen have always being configurable to 28W (e.g. 1135G7, 1165G7)

On the 11th gen they allowed the same chip to be configurable as UP3 or UP4 to power lévels of 15W or 28W

On 12th gen the P series is meant to replace the 28W 1165G7, competing to AMD 6800U series.

It features for the first time comparable multi core performance (Intel absolutely prioritized performance benchmarks), at expense of a brutal peak power consumption.

For the 12th gen the 15W configurable part was again renamed U series, but is a different product category

While AMD has a sole product that can offer both power efficiency and performance

Lenovo had only used U series CPU's in their ultralights in the past and for some reason the tests are being done with the much more power hungry P series of Alder Lake CPUs. Battery life against a U series CPU (which is better suited to an ultralight) will be similar if not better.

That makes sense cause 12th gen parts are 28w whereas 11th gen ones were 15w

Quote from: JayN on April 24, 2022, 19:59:58
Not clear what the major concern is.  Is this pointed at people spending 11 hours in a coffee shop?

11 hours max is under lowest load. This could be translating into 8 hours under average load and into 2:30 under max load. So yes, it could be targeted at those working 8 hour shifts in the field or those needed a part of heavy work done in the coffee shop.

Quote from: Anonym on April 24, 2022, 20:27:31

Quote from: JayN on April 24, 2022, 19:59:58
Intel has some power efficent cores on most of the laptop models.

That's a common misconception. Unlike the big.LITTLE implementation in ARM, Intel chose to optimize for die surface rather than power consumption.

Its strange, Intel could have bound windows update and even netflix/firefox to the efficiency cores with the built in video acceleration when watching youtube. This would certainly have helped batter benchmarks.

Well, I, for once went with Tiger Lake because I couldn't wait to play AMD's Shipping lottery (and Lenovo/HP are terrible options in laptop terms) and I knew Alder Lake was a first gen product, so I didn't want to be a tester for it.

My Latitude 9520 is ok so far. Not the coolest one in the world, but it's manageable, but it doesn't burns me either. Battery life is okayish, but that's more thanks to Windows 10 than anything. I will probably upgrade to the 88Wh battery soon either way, so that will do it.

That's cause the E cores aren't there for increased battery life but increased performance and performance/watt which certainly achieves.

During light workloads and idle the chips are asleep anyways so it doesn't matter whether you use an E core or a P core.

Intel's problem is that they have an off-die PCH, while ARM and even AMD has an on-die one. That's why Remembrandt is starting to beat Intel in battery life, a bastion they held until recently.

Raptorlake's DLVR won't help battery life either. Again, it doesn't help idle. It's there to increase performance/watt, so it has better performance at the same TDP, which means under load.

Only Meteorlake with Foveros they have any chance of gaining the battery life leadership back.

This Intel 11th Gen to Intel 12th Gen comparison may not be fair as I believe at this point you are comparing the currently released 28 Watt P-series mobile processors to the prior generation 15 Watt U-Series Processors. You will really have to wait for a the new 12th Gen 15 Watt U-Series to come out for a fair comparison.

PS -  It seems to be incontestable that AMD and certainly Apple are far more power efficient per unit of computing.

bugfix:
it's the *lowest* surface to computational power ratio

Quote from: JayN on April 24, 2022, 19:59:58
Intel has some power efficent cores on most of the laptop models.

That's a common misconception. Unlike the big.LITTLE implementation in ARM, Intel chose to optimize for die surface rather than power consumption. That is, the Intel "efficiency cores" have the highest surface to computational power ratio, four cores in the same surface as a single "performance core" to be exact. Intel never claimed those cores took that much less power, because they really aren't that much better in that regard. It's "moar cores" taken to the next level, where "efficiency" is actually "moar cores in the same space". Bravo Intel.

Intel has some power efficent cores on most of the laptop models.  The obvious thing to do is add an operation mode that disables the high performance cores, for use when battery life is the prime concern.

Not clear what the major concern is.  Is this pointed at people spending 11 hours in a coffee shop?

Alder lake cpu can clock up to 100w which allows over 5.3Ghz cpu performance at a high inefficient speed interface. This makes AMD a better choice for the power computing generation allowing 20TFLOps for every watt

There are handful of Alder Lake, and Rembrandt laptops for that matter, reviewed already. And not only frok Lenovo.

It clearly shows the inefficiency as Rembrandt can typically last double the Alder Lake, despite losing just a bit behind in maximum performance. Not to mention RDNA2 iGPU leaves Intel XE in the dust.

Some people might no longer need a laptop with low performance dGPU such as Nvidia MX series, as the performance will be just as similar.

Meh. That's just Windows 10.11 "battery tax".
I mean, if you spin a Chromium Extension Framework in the background FOR EVERY APP, updating news & weather & all that sorta sh*t... Your battery life's gonna be sh*t! It's like, "learn to code"!

I wonder if my post at ThinkPad reddit titled "Alder Lake ThinkPads seem to have less battery life in general compared to last year's models" which I sent on Friday has inspired this news entry 🙂