Alright, I tested this with Fraps + non-patched KOTOR 2
With Tweak:
2005-04-16 08:30:57 - swkotor2
Frames: 841 - Time: 26976ms - Avg: 31.176 - Min: 9 - Max: 152
Without Tweak:
2005-04-16 08:33:53 - swkotor2
Frames: 707 - Time: 24425ms - Avg: 28.946 - Min: 9 - Max: 141
I tested this on the prologue, opening the Main Hold door and going to the door that will lead to Engine Room and Med. bay.
Specs:
AMD Duron 1.2Ghz
ATI Radeon 9600
640MB RAM
No other programs running into backround
800x600@Low+all special effects off+DVBO-tweak
As you can see, min stays the same while avg. and max. rise.
EDIT: Couldn't get same frames for both of them even though I did everything in the same way