7800GTX overclocks with Volt Mods??

[ViperJohn]

These are the points that he asked.

Pin 23 (V12_SEN) which is the left pin of the two pins indicated in red along the bottom side of the chip has a voltage divider

If you follow straight down from P23 the SMR just below the automated test point pad goes to Vcore PS B+ out. The SMR marked 622 to the left goes to ground and forms the other 1/2 of the divider. I tried a Vmod at the 622 SMR already.

I started 100k then turned down to 50K and the Vcore did not change even 1/1000 of a volt so that isn't da place. Someone can double check me on that if they want.

The three Vdd input pins (12, 24 ans 36) look like are they are traced to each other under the chip from the ohm meter readings of zero ohms to each other.

Viper