I have the Galaxy 7300GT cards now. Forgetting using a pencil ( which is only really good for drawing pictures of naked ladies or sticking up your nose ) the volt mod is as follows

There are two ISL 6549 14 leg IC's, one for memory ( back of card ) and one for gpu (front of card). The feedback pin is pin 4.

Memory FB resistance = 640
Gpu FB resistance =640

Hence use 50k pot and set to 12k and work down.

Measuring point for gpu volts is the bottom of the top left large capacitor.
Measuring point for the memory is one of the two large bottom capacitors at the far right of the front of the card

Volts as as standard are 1.30v and 1.91v on my card. Now running at 1.4v and 2.04v.



Regards

Andy