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As some of you may know, the classic Unreal Tournament, and possibly also Unreal itself, but I haven't tested it, suffer from a bizarre form of slowdown on newer computers, largely traced to both Vista and processor management facilities. The game literally runs in slow motion, not stuttering or lagging, but literally as if the 'speed' of the game has been turned down.
My question is this, has anyone who has had the issue found it has been resolved by the GOG team's efforts? Also, if anyone from the team is out there, would they be able to comment if they have encountered and fixed this bug, it effectively prevents people from playing properly on newer machines, and no 'quick fix' I have found online, such as mapping the process to a single core, or making sure speedstep is turned off have worked.
This question / problem has been solved by Firekimage
By default we limit both Unreal and UT to a single core, which helps on XP. We were unable to create a straight-out-of-the-box solution for Vista, since the problem lies in modern hardware. We have found, though, that setting Vista's power management settings to highest performance fixed this on our systems.
I will create a support article about this shortly.
I tried to do something similar a while ago by running a CPU stress test with Prime95 in the background, but it didn't help much. ;)