First, let me define "up to 28%", then I'll outline what this is about.
From some benchmarks, the extent of gaming performance lost to VBS varies a LOT, depending on which game. The worst I've seen mentioned is 28%.
What am I on about?
The latest (Oct 1st) WAN Show starts with Linus and Luke talking about Win11 "VBS", that is, "virtualisation-based security" partially bricking (Linus' phrase, not mine) gaming performance, and which, it seems might not be optional on pre-built PCs. It appears to not apply to DIY installs, or custom-built machines. Yet. It's a bit unclear where the line is but it appears to be related to "Tier 1" like Dell, HP, etc rather than smaller-scale system integrators doing a more on-demand build but, as with the TPM thing, it's currently unclear.
Essentially, from what I can make out, VBS is a very good thing for security as it sandboxes most ways in which malicious software can "infect" machines but, as GPU virtualisation is far less advanced than CPU virtualisation, testing seems to show you can lose up to (so far) 28% of the raw performance of those supremely expensive rocking horse piles known as 3080, 3090, etc.
So before you buy a pre-built PC, for gaming, you might want to check out exactly what-the-bleeeeeep is going on with this.
As Linus/Luke point out, in many ways, VBS is a Very Good Thing. If you aren't a gamer, it appears to go quite a long way towards making your system more Covi... sorry, wrong virus .... malware resistant. And who could object to that.
Other than gamers, of course. Which might end up as another strong motivation for the gaming industry to look more and more to Linux for gaming.
What worries me a bit is an issue like this cropping up so damn close to Win11 launch day. Why is this only coming out now? And why is there so little info and so many "maybe's" and "might's" involved?
Personally, I don't much care as, for other reasons (already stated, in another thread) I'm not much interested (if at all) in Win11 so I don't have a dog in this fight, but after all the uncertainty of what systems are supported, what the TPM requirements are, and so on, this is apparently yet another example of Win11 looking .... rushed. And truly dire PR.
Anyway, this stuff came from The WAN Show for anyone interested.


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