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Processor management in Lenovo V15 (or just Intel 10th gen mobile) seems to have changed

mikeymikec

Lifer
May 19, 2011
14,427
4,495
136
I've bought a few Lenovo V15 laptops lately, all with the Intel Core i3-1005G1 processor: https://ark.intel.com/content/www/us/en/ark/products/196588/intel-core-i3-1005g1-processor-4m-cache-up-to-3-40-ghz.html

What I'm used to with modern processors is that the processor clock frequency goes way down when idle, then automatically and almost instantaneously goes up to either a higher clock, full clock or turbo frequency.

However, what I've been seeing on the Lenovo V15 is that even with a lot of sustained processor usage, it doesn't budge from about 1.2GHz. On the default settings (balanced profile, on mains) it will sometimes go to its full clock frequency but nowhere near as often/readily as with previous processor generations.

I found a setting in the BIOS (IIRC it was labelled something like 'processor performance management'), which I set from the default to something like 'full performance', and lo and behold the processor clock management went to what I expected it to be (low clock on idle, higher clocks soon after usage is increased).

As I said, I don't know whether this is a Core 10th gen thing (as in some new default behaviour and the manufacturer provides a workaround to those who look for it), or a Lenovo V15 thing, but I'd advise anyone with a 10th gen Intel chip (probably just mobile) to look for it.

While in hindsight I ought to have done some performance testing both before and after the setting change, I'd be extremely surprised if a saturated processor at a 1.2GHz clock at is going to perform anywhere as well as the same saturated processor at say a 3.4GHz clock.
 

VirtualLarry

No Lifer
Aug 25, 2001
50,897
6,312
126
I have this Asus, with a B970 (Sandy Bridge-era Pentium mobile CPU, dual-core), and by default, when plugged in, it runs @ 2.3Ghz, the max speed of the CPU. But on battery, it only runs @ 800Mhz. I couldn't really figure a way around that. (Maybe BIOS controlled, as you found out? Mine doesn't seem to have a setting to adjust.)

Seemed kind of deceptive, to market the laptop as "2.3Ghz", when it only achieves that plugged-in, and most laptops are used, well, on battery, in one's lap or whatnot. If I wanted it plugged-in all of the time, I would have bought a tiny desktop PC. (Well, I have those too, but just for consumer-perspective argument's sake here.)
 

VirtualLarry

No Lifer
Aug 25, 2001
50,897
6,312
126
On that laptop, didn't matter what I set the Advanced Power Management settings to, still didn't speed up, in general. Maybe for a split-second, it might burst to 2.3Ghz, but wouldn't sustain. Not a power / thermal issue either.
 

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