Gtx 480 powercard

[hidethecookies]

This one was easier than I thought a few people said it was hard and won't publicly share there work. I will though. All I did was look at the pinout of the chl8266 controller. The three 3.3v vcc pins 36, 28, and 3 are all connected to the same 3.3v plane. When power is added to the 3.3v power plane it powers all the pins needed. I just picked pin 36 traced to its capacitor and solder to it. The EN pin is 11 and this is where it got tricky because it goes strait to a via and buried trace. The cool thing about the 480&580 ref PCB there is a second controller pad that is not populated but all traces are there and hooked up. I just check continuity between pin 11 on the populated and unpopulated controller pad and it was 0ohm. That makes it easy to just solder straight to the empty pad. I used a small DC DC converter from eBay for 3.3v. I have yet to do an ocp or volt mod. I think I need to pull psi pin 16 high to make sure all phases are active though. I also used an old 570 ref heatsink and cut it for vrm cooling. Any questions just ask.

Edited February 18, 2017 by hidethecookies

[hidethecookies]

I can't seem to figure out the vmem output. I have a working 480 to test and the up6210 data sheet. I tried the usual add power to vcc and en but it's not working.

[buildzoid]

What are you feeding the UP6210's VCC with? It needs at least 5V to work.

[hidethecookies]

Yeah I used a second DC DC converter to supply 5 volts. On my working 480 it was 12v so I tried that too. I not sure what the en pin is looking for I tried 3.3v. That's what I used for up1981 and chl8266. I have to recheck the working one. The card I cut was shipped to me untested with a full cover water block unmounted. They were not secured properly so the block beat the hell out of the card. It did not post so I just checked core voltage before the cut. It could be damaged somehow but looks good.

[buildzoid]

Are you powering the PVCC pin? Without 12/5V going to it the controller doesn't have gate drive power.

[hidethecookies]

According to DS pvcc is output of internal 9v LDO. The pin provides stepped down current

for gate drives. No need to supply power to it. It outputs about 10v when I feed vcc with 12. For some reason the controller is not fully enabled is there a way to test the gate driver?

[alexmx]

Hi, thanks for sharing

 

I have a 480 dead to be cut but only pin out stopped me from doing the tests. I don't have a 480 alive.

Up6210 takes the 12v from pcie, did you connect 12v from atx to pcie?

[hidethecookies]

Haven't figured out the vmem yet and from the looks of others 480 zombies neither have they. I think there is a few signal, sense, or feedback lines that get cut and need replaced.

[hidethecookies]

Repost lost pictures.

[hidethecookies]

Here's the diagram I made for it. I would like to add to the OP or previous post but I cant edit anything.