As you can see Crow hard @ work Modding his Radeon 9500 to Radeon 9700 and he tells me that he's posted his guide with pic's and benchmarks of the mod.
we choose a Sapphire Radeon 9500 128MB video card, as you know, mainly because this particular card is similar in layout to a Radeon 9700 card. There are two process to tweaking it : changing the core resister's position, and flashing the Radeon 9700 BIOS (overwriting the Radeon 9500 BIOS that's already on the card). Changing the core resister's position changing is the keypoint of this tweak, along with the most difficult.
we choose a Sapphire Radeon 9500 128MB video card, as you know, mainly because this particular card is similar in layout to a Radeon 9700 card. There are two process to tweaking it : changing the core resister's position, and flashing the Radeon 9700 BIOS (overwriting the Radeon 9500 BIOS that's already on the card). Changing the core resister's position changing is the keypoint of this tweak, along with the most difficult.