Asus 8600GT Vmod

[Sam__]

I've found the read points and vmem mod just having trouble with the vcore.

http://i195.photobucket.com/albums/z25/sam__07/Comp/IM000309.jpg

Chip labeles 1 is: 6549CBZ P731CNS

There are two pins that have resistance to groun in the right area but neither seem to make a difference to vcore when i change it :(

2 is: Pm25LV512 AE0729 120530H - Can't find any pins that have resistance to ground

chip labeled AND gates is a 74ACT08 which from memory is a Quad Two input AND gate chip.

There are some chips on the front...

AT8858C

and two BBA7T19 opposite the vmem chip.

any ideas? thanks in advance.

[Sam__]

Front:

http://i195.photobucket.com/albums/z25/sam__07/Comp/IM000314800x600.jpg

AT8858C is next to the 1R2

BBA7T19 are in top right

[Sam__]

Seems like pin4 of 6549CBZ should be vcore. but doesnt reading doesnt change, think i have my read point wrong. any ideas?