I replaced a P4 with a C2550D4I for a friend last year. Where the P4 struggled with modern YouTube videos at 480p, the Avoton (an Atom) did 1080p without much t

I replaced a P4 with a C2550D4I for a friend last year. Where the P4 struggled with modern YouTube videos at 480p, the Avoton (an Atom) did 1080p without much trouble. It is odd that The P4 did so well in Intel's marketing video, but did not in 2015. My guess is that the decoder for the more modern video codecs require more than the P4 is able to do. It is also possible that the OS made a difference. His P4 ran Windows XP while the Avoton runs Gentoo Linux. Gentoo Linux should have had a decoder that could use SSE2 while Windows XP might not have. That said, I was pleasantly surprised by the performance of the puny Aspeed graphics card with kernel mode setting. There is minimal tearing and the frame rates are smooth. The P4 had used a GeForce 3.