This is what got us wondering about the effects of gaming downloads in the first place, and is why we published our recent (very) long-read yesterday, asking: What does gaming’s all-digital future mean for the climate crisis? Setting out, what we hoped to discover was the impact of that ever-growing pile of downloads on the climate. It turns out that was easier said than done, but there are some more definitive lessons to be learned - quite a few of them, in fact - and picking through the findings of various studies and corporate responsibility reports, there is some semblance of an answer to be found. With that in mind, here’s a (relatively) brief summary of the key things we’ve learned. This is because: a) ever-growing data centre efficiency, due to some concerted efforts by companies to improve power consumption, is making a real difference, offsetting the rapid growth of internet traffic over the last decade entirely. And b) it relies on the electricity grid, which in theory can be fully decarbonised in the near future (if governments and companies do the necessary work fast enough). Contrast that to the things we use to move physical items, like lorries, cargo ships, and planes, and you can see the basic reasoning. Generally, making a disc and sending it somewhere physically creates more emissions than sending bits through a piece of copper wire. However… The details are where things get complicated. Efficiency gains have offset the growth in demand, but they haven’t caused data centre energy usage to actually drop in absolute terms - as in, go down year-on-year instead of staying flat - which we need to be doing overall if we want to hit IPCC targets in time. And national grids are decarbonizing, but at different rates, varying from one country to the next - or, in the US, from state to state. Changing that requires governments, corporations, and voters with the desire to do so, and as we learned, some companies have very different standards as to what counts as “carbon neutral” or real “renewably sourced” energy. Then, there are the externalities, as any good economist will hastily remind you. The industry’s switch to digital gaming might mean lower emissions in the immediate term, but it might also lead to a massive boost in demand for the services themselves - it’s easy to imagine a combination of ubiquitous 5G and cheap cloud gaming combining to do just that, for example. Growth in demand might outstrip the growth in efficiency; it might mean a growth in always-on network infrastructure in order to account for higher peaks; it might mean more demand for hardware, like PC components or screens, that require those smelted metals. And yet, even then, it might still be better than the alternative. One of Professor Jonathan Koomey’s maxims is to always ask “compared to what?” when thinking about technology’s energy usage. In that case, as Joshua Aslan concludes in his paper, taking a broad group of averages, gaming produces fewer emissions than driving to the cinema to watch a film, or football pitch for a quick match with friends. But it still uses energy, it could still have major knock-on effects, and that energy still can - and must - be reduced. If we learned one thing about energy, emissions, and technology as a whole, it’s that it’s extremely difficult to know where to draw the boundaries of this kind of question. So, like we said: it’s complicated. Generally, discs are out - there’s only one ultra-specific scenario (which already relies on all kinds of averages by necessity, given the natural scope of the study) - where disc-based gaming is more efficient. As for digital vs cloud, that’s where things really depend. Downloads use a chunk of energy during the download process, then just the console’s own energy consumption once you’re playing. Cloud uses a smaller amount of energy on top of the console, but it’s being used during your entire playtime - and which means emissions can get very high if you do it for a very long time. In brief then: the smaller the game’s file size (in total, including all patches you download too), and the longer you’re playing it for, the better digital downloads are. The larger the total game file downloads, and the shorter the game, the better cloud is as an option. (But remember, you’re using a lot of energy per hour when you cloud game, so if you end up doing it for much longer than planned, you can dramatically increase the emissions produced compared to the alternatives.) A quick example: a fairly chunky, 35GB demo that you can only play for two hours? Better to cloud stream it. A small service game you’ll play for ages, like something along the lines of Rocket League? Better to download it up front. See our main report and J. Aslan’s study (free to read here) for much more detail on the variables that can affect this (the device you use is a big one…). Others, which lack “system integration” as it’s known in the field, can use as much power locally when cloud gaming - where all the processing is being done, with energy powering it, in a data centre elsewhere - as they do when powering the game themselves, which is an almighty waste. Basically the work’s being done twice, which means unnecessary emissions. Examples include the usual static home consoles (both last and current gen) and above all, mid- and high-end gaming PCs. Hardware also makes a difference however you play. Dr Evan Mills - an expert in the field who’s also a scientist on the IPCC itself - wrote a couple of studies that highlighted this. On average, for instance, high-end gaming PCs use around twenty times the energy to play The Elder Scrolls 5: Skyrim than a Nintendo Switch does. He also showed that high-end gaming PCs could use up to 75 percent less energy and still get the same levels of performance in games.
“Many long-used energy policy strategies are applicable in the computer gaming arena, including energy labeling, consumer information and education, voluntary ratings, improved software, and manufacturer R&D,” he said. It’s noted that “mandatory, system-level” ratings would potentially be “highly problematic” for a few reasons (the difficulty to benchmark them all, the fast-moving nature of the industry, etc.) but, “Component-level standards may be more manageable, e.g., regarding power management in CPUs, GPUs, or motherboards.” “Policy attention to PCs is of particular importance,” the report notes, “particularly given the paucity of such attention to-date.” “Be more transparent - label your products”, Dr. Mills added to us via email. “Enable the DIY community by working with web-based design tools like PCPartpicker to help users estimate energy use of the systems being assembled, and recommend more efficient componentry or design, help consumers avoid bottlenecks (e.g. bottlenecks that waste the power of certain components).” “In marketing, shift the “Bragging Rights” conversation from power (how many watts one’s GPU is) to efficiency.” “Work with game developers to create games that demand less energy to achieve the desired experiences” - notably (and again this is really an entire other conversation for developers to pick apart), console and PC energy consumption varied from game to game, with no correlation to genre. And one from Dr. Aslan: when the technology allows it, making things like demos and the now-ubiquitous beta tests available to cloud stream, instead of download in one chunk, could cut a lot of wastage, given you’re limited to playing a certain number of hours. (Similarly, if you want to dip your toe into a Game Pass game without downloading it, using the upcoming console-based Xbox cloud service to test that out before downloading it all is a nice idea).
There is also one other thing to think about, industry-wide, including for us who cover games and play them. This, really, was the consistent point made to us by the specialists that we spoke to. You can be on the greenest grid in the world and still have a significant impact on the climate by constantly refreshing hardware for a few extra frames per second - because the manufacture, shipping, and disposal of hardware produces greenhouse gases. More broadly, it’s about our attitudes as a whole, and the responsibility the whole industry has. As games are run at higher frame rates and higher resolutions, the returns - in terms of how many emissions are created from that increase, versus the difference visible to the human eye, or, above all, the actual amount of enjoyment being created - begin to diminish. It seems increasingly likely that there will come a time when it feels obscene to still fetishise a console or a graphics card’s gains in raw processing power, without at least looking at the emissions that increase might entail. It’s a question the whole industry has to ask itself, from marketers and manufacturers to journalists and players. And there’s a good case to say the time’s already come.
