Forgive me if this is a dumb question.With my DLSD PB, do you know if there is any hope of using that to squeeze a bit more graphical umph from it, or would I just be running the risk of overheating with any increase?
Sure thing. Just keep an eye on the running temps with iStat Menus or Temperature Monitor and see how much temps increase, if at all, as you step up the processor and memory frequencies.
Another use would be to underclock an ATI GPU in a G3 or G4 portable to reduce general running temperatures and possibly increase longevity of the hardware.
On that note, there was also a G3 CPU scaling kernel extension called iCook which can change the CPU speed of a 750FX on the fly. You could for example underclock a G3 700Mhz iBook down to 300Mhz if you wanted to reduce temps and increase battery time.
Here's a direct download link for iCook v1.0 on the Wayback Machine;
https://web.archive.org/web/20140629222521/http://swieskowski.net/icook/iCook.zip
(GPL'd source and .xcodeproj files are included)