unknown resistance at mosfet
Hello everyone, I'm new to the forum and would like to get a few answers from the members. Firstly, sorry for my bad english, I try to correctly write.
So, I have a Zotac 9800GT, what had shorted MOSFETs. It worked well 2 month ago. I replaced them but unfortunately a component ( I think a resistor which set the operating point) had broke down. I don't know what component is it
I replaced that with a variable resistor (because the 2 pads directly connected to the 6-pin's +12V and ground) and I increased the resistance until I measure 1,37kohm on that (R=U/I) because it need on full load 105W, and the capacitors are tear on DC. But nothing happen. 
So here's my questions:
1. Had I correctly calculated the input resistance, or is it a big mistake?
2. Can someone measure me the input resistance of an other Zotac 9800gt?
3. Is it possible that the GPU died?
Thank you in advance for your answers.
So, I have a Zotac 9800GT, what had shorted MOSFETs. It worked well 2 month ago. I replaced them but unfortunately a component ( I think a resistor which set the operating point) had broke down. I don't know what component is it
I replaced that with a variable resistor (because the 2 pads directly connected to the 6-pin's +12V and ground) and I increased the resistance until I measure 1,37kohm on that (R=U/I) because it need on full load 105W, and the capacitors are tear on DC. But nothing happen. So here's my questions: 1. Had I correctly calculated the input resistance, or is it a big mistake?
2. Can someone measure me the input resistance of an other Zotac 9800gt?
3. Is it possible that the GPU died?
Thank you in advance for your answers.