I bought a not working sapphire rx 470 nitro + last week and trying to repair but could not find part number of choke. Unfortunately there is no information in google. If anyone knows that please write me!
You have an oscilloscope? Put a resistor in series with it if so and look for the frequency, then use L = sq.rt3 (R) divided by 2*Pi*F, where F=frequency, R=resistance of resistor.
If you do have an oscilloscope, you just *may* possibly be able to squeak by using a multimeter set to Ohms, and then finding frequency as Ohms are resistance/time. Thats how you used to fine-tune PS2 lasers without an oscilloscope! Fun times and many burnt lasers came from it.