I've been scouring the forums the past week or so trying to learn how to do a volt mod on my GPU (XFX 9800 GTX+) to increase the core voltage. Also, in general i'm just trying to eliminate any artifacts when overclocking the core clock and memory clock in Afterburner (stop me if I'm way off about what I should be doing now).
I've figured out how to measure the resistance using the pins on the voltage regulator and have done so.
What I would like to know is if there is a process I can apply to any GPU PCB to find out which points to use for measuring vcore, vmem, etc. (as well as figuring out where to solder)
Too lazy to pull card but i'm 95% sure this is my specific PCB...
also, I kind of randomly poked about while the pc was on getting readings here and there from various capacitors and pads in and around the white square, varying from 1.2v~2.48v so it really didn't help me figure out anything.
have another XFX 9800 GTX+ which appears to have reference PCB (NVIDIA logo)
measured stock voltage off cap C666, 1.19v, looked normal
measured resistance according to this picture from this guide and got a reading of 13 ohms
Is that normal? I was expecting something like at least 130 or 1300, unless i'm reading it wrong (DMM was set to 200ohm range so I'm pretty sure I did it correctly). FYI: been a while but I think i bought this card off ebay and it shipped from china (cheap knockoff issues?).
Edited by regularguy - 10/7/12 at 8:22pm