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Recent content by krushin1

  1. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    The card is still sitting on the shelf, but I'm thinking it's likely the interposer. Your issue sounds like it's more likely to be fixable if the card fires up. Keep in mind if you do think you've found a bad capacitor, you can't really check them with a multimeter without removing them from the...
  2. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    Andrew_Carr Thanks, yeah I think I watched about 2 dozen videos on Vegas and 1080 and RX style cards. The 'Tech Cemetary' tutorials are very good as well. I did learn alot, but I didn't see any cards that had exactly the same problem as this one. Pretty much all of the cards (at least that...
  3. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    Well, I borrowed a FLIR camera. I gave the board a pretty thorough going over, I also checked up close with a macro lens but I was unable to find any areas of the board that were heating up other than the memory and area underneath it on the PCB. I'm thinking this one's a parts card. The...
  4. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    Interestingly, if I probe between the left pad and a some of the tiny little resistors that are placed all around the GPU die, I get 37 ohms. Which was the value I got from the memory inductor to ground on the good card. Probing from those same resistors to ground shows about 31 ohms. All of...
  5. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    I was referring to the pad on the left. The switch node on the right does show high resistance to most of the board components even with the FET package still installed. I am supposed to be injecting 1.2V into the pad on the left (on the front of the board with the inductor removed), correct...
  6. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    I removed the black capacitors and they tested around 450 uF, so they must be fine. The 4 to the left of them tested 23uF, so must be ok as well. I still get 0.2 ohms across the pads where they used to be so they're still hooked up through some other components. Across the pads on the front...
  7. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    So, I hooked 1.2V up to the pad... My power supply is geared to drive a short up to 30A so initially I set a current limit, but it maxxed out at a little over 2 amps, so it's not just sinking endless current or anything, which maybe explains why the 1.2V wasn't unhappy about being there. I gave...
  8. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    RazorWind Thanks for the quick reply! Yes, when check the left pad to ground I either get 0.2 ohms or 0.0 ohms, which seems to indicated it's shorted. The 1.2V puzzles me, because you would think it would blow something up being powered up with a short like that (though I suppose it may have...
  9. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    I couldn't for the life of me figure out how to send a private message. Hopefully quoting your name sends you a notification lol... RazorWind any chance you can confirm my findings? Not sure if you're familiar with the Vega style cards?
  10. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    Well... I removed the inductor and the MOSFET for the memory phase. From what I understand the left portion of the inductor pad to ground should read the memory resistance. I'm still getting 0 ohms. I'm thinking that means the HBM memory portion of the die is shorted. :( If I'm wrong someone...
  11. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    Well, the answer was in my picture above :whistle: The resistance on the HBM memory inductor on the bottom should be around 35-40 ohms, I verified this with a good card. With my old leads it was reading 0.8 (which is still too low and should have clued me in). But with my new super pointy test...
  12. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    Thanks, maybe I will shoot him a message!
  13. K

    Vega 64 Component Identification

    Attached is my mapping of the pins on the mystery 6-pin IC. 1) Ground 2) No Connection 3 & 4) Tied together. Go to the 2 caps and resistor, resistor shows zero ohms when tested so may be faulty. Caps show 7 ohms to ground, may also be faulty. 5 & 6) Each goes to ground through a pair of...
  14. K

    Vega 64 Component Identification

    So, I'm continuing to troubleshoot my Vega 64, no display, no fan issue. Figured maybe reposting in the AMD flavor area might be a good idea. Any help greatly appreciated! to quote the other thread: "When powered up the 12 phases are all getting 900mV, HBM is getting 1.2V, 5V rails are good on...
  15. K

    Any Vega 64 Graphics Card Circuitry Guru's out there?

    Hi, New to the forum here. Hoping there's a graphics card repair expert out there that can point me in the right direction. I have a Vega 64 card that does not boot, and fan does not spin. After watching several youtube videos to gain an understanding of how the cards work I was hopeful I could...
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