If you've been keeping track of Intel's notoriously petty and face-on-ground marketing, especially for Tiger Lake-based systems (especially when it came to the "Evo" branding), you'd probably see a slide not unlike the one below, where Intel was claiming AMD gets its battery performance claims because it's putting a muzzle on how fast it can go when away from the charger.
This was on a Zen 2-based Renoir APU, and Intel rather cheekily (and quite obviously) left out the fact that its boost behavior does result in higher battery drain during such periods. Now though, with a brand-new lineup of Zen 3-based Cezanne APUs and lots of high-end designs that utilize the best of AMD, one question that some have is whether boosting behavior has been tweaked?
Well, it hasn't, not by much anyway.
Tests by Gordon Ung noted that while the Ryzen 5800U has shown to smoke the Intel Core i7 1185G7 in many tasks, many of which were while the laptop is connected to AC power. When running on battery, the script does flip, sometimes by a little, sometimes by a lot.
The delta isn't massive when in the "Best Performance" preset, with around a 20-25%-ish performance delta between plugged and unplugged, though the delta between plugged and unplugged when on the "Better Battery" preset is quite significant, though perhaps not entirely unexpected.
It's also worth noting that the Intel machine doesn't keep that performance for nothing, as it does chug down quite a lot more watts in bursts in order to maintain that level of performance when off the charger.
Interestingly, Daniel Rubino of Windows Central noted that the SSD is also throttled when on battery, due to a feature called PCIe Speed Power Policy (PCPP).
My thoughts (this is going to be a long one, but you all need to read this!)
The big question that I'm sure many would be asking right now is "Is AMD wrong in doing this?"
And the answer is a big straight-up no. What AMD is doing is effectively not that much different from many older laptops, where off-charger performance is significantly hampered in an effort to conserve energy, particularly as processors of that era have not reached the level of performance-per-watt that current-generation designs have managed to achieve. In fact, some of the bench graphs show that Intel does also throttle performance a bit when off the charger, particularly in lightened workloads.
And it is definitely worth noting that while these charts do indeed show a drastic drop-off especially in the "Better Battery" mode, it is important to note the context, in which these involve ultra-portable low-wattage laptops. It's more likely that a user would be doing tasks like browsing the web or doing document work on such a machine, where the additional responsiveness of Intel's boost behavior may not be as apparent, but battery saving measures, even at the cost of performance, may be more appreciated. Even Gordon makes that case in his article.
Neither AMD and Intel have a straight up "wrong" strategy here, moreso that they are very different. Intel is very clearly focused on responsiveness at the expense of outright efficiency, whilst AMD is perfectly happy to ease off the pedal significantly in order to gain more work-per-watt. Depending on your priorities, you might find one or the other more appealing.
With that said, here is where I get a bit more opiniated and personal. While I perfectly understand each company's reasoning for what they're doing, I am disappointed that there is no real way to fully adjust the way they behave through Windows' power settings. Intel's power consumption spikes are significantly calmer when in "Better Battery", but not usually by a big amount, whilst AMD's performance improves in "Best Performance", there's no real way to fully lift off the muzzle if, for whatever reason, you need all the CPU performance off-the-charger to finish off some work, such as editing photos on Lightroom.
While neither philosophies are straight-up wrong, I'm disappointed that I can't really have the option of straight up gimping performance significantly when I need to conserve my watts, or going full-ham on battery when I need to finish off that landscape photograph on Lightroom.
Sources
Tested: Is Ryzen 5000 battery performance really that bad?
Some AMD laptops reduce system performance for better battery life, but is that OK?