Intel has released its own internal testing of architectures dated from Skylake to Coffee Lake, using Windows 10 and Windows 7, in A/B testing between the Meltdown kernel patch. We’ve done some of our own testing (but need to do more), but not with the applications Intel has tested. As usual, exercise grain-of-salt-mining for first-party numbers, but it’s a starting point.

Intel claims that it’s found its CPUs largely retain 95-100% of their original performance (from pre-patch, with some worst-case scenarios showing 79% of original performance – Skylake in SYSMark 2014 SE Responsiveness, namely. On average, it would appear that Intel is retaining roughly 96% of its performance, based on its own internal, first-party data.

Here’s the full chart from the company: