I'm also having this "speed down" problem. I haven't tested it with ripped games, also not with retail games or ixtreme backups. This problem happens with some XBLA games (Trials HD for example, patched with yaris-swap, very often right from the beginning of a level). Also, funny thing, I somehow have installed Fable 2 to the HDD with the dashboards original "install game to HDD" feature, now I have TWO versions on my HDD. One with the full description for the game, which will ask for the DVD in drive, and one that will just run from HDD without anything in the drive... and it will slow down too, in the intro sequence with the bird for example. It's pretty unwatchable. Or even the start screens smooth scrolling of the landscape isn't that smooth at all now. The game itself (if I skip the sequence) runs fine, but I didn't play for 10 minutes...
Many other XBLA games, patched or unpatched, SSF2THDR for example, run fine. I'll put some research into it now, checking if it happens after 10 minutes with ripped, retail (on DVD) or backuped (on DVD) games too.
What's causing it? This x360gamehack program will help in this matter? I guess not, as someone already said he used it and it didn't help. Freeboot is not suffering from this problem? I hope it gets fixed soon, because all of this, XBR, xexloader, yaris-swap (or the other tools for doing that patching), it's just f*cking awesome! Thanks to everyone involved! I appreciate your effort!
QUOTE(mafiafan123 @ Dec 6 2009, 08:35 AM)

You cannot play a game thats not on the backwards comp. list because of the fact that micro$haft made basicly an software emulator for each title to run the xbox 1 games. oh a side note looks like its time to start modding again after i did about 15-20 orignals and repairs ect I want to try the 360 side Im in the process myself of getting an xbox360 that wasnt updated. Great work guys!
I don't think so! Look at the size of the last backward compatibility pack download. It's pretty small. And what's installed to the HDD of it is even smaller. My guess is that there is a general emulator, and the backward comp downloads are just some additional fixes to the emu for each game. The reason why the emulator isn't available for just any original XBox game would be that they wanted to make sure the game is not only playable but also finishable, thus the emulator runs only checked and "fixed" games.
Maybe those back comp downloads are even just JIT patches for the original game, so the emulator runs smooth...