Quote Originally Posted by Rick Hunter View Post
Here's my pencil mod results on my HIS 3850 512 MB IceQ3 Turbo.

__ohm Volt MaxMHz Temp
2.26K 1.31V 826 MHz 48
1.38K 1.36V 850 MHz 51
1.45K 1.39V 876 MHz 53
1.13K 1.44V 904 MHz 56

Penciling in 1.13Kohm was not easy.

Scales pretty linearly across the board. Stable in 3DMark06 and AtiTool artifact tester.

I also slapped on a different fan onto the original heatsink, an 80 CFM Delta 80mm @ 70%. Brought down the temps by about 7 degrees on average.
Update:

After a day, the pencil mod wore off a little bit. I redid the pencil mod with the aforementioned technique (over the top of the resistor). Here are the new results:

__ohm Volt MaxMHz Temp
1.13K 1.44V 904 MHz 56
1.19K 1.43V 891 MHz 56
0.99K 1.46V 918 MHz 56
0.99K 1.46V 918 MHz 49 (delta @ 100%)

Ambient temp is about 23-24 degrees.