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6900XT Power Limit Tricks

Can somebody please tell me where the SCL and SDA are near the IOR spot in this 6800 XT Nitro+? The layout looks different.

Also how do you solder wires to such tiny spots? Looks like the period in this sentence. LOL.

I think I destroyed the I2C header on my GPU (tester beeps when SCL and SDA pads are touched) so I’m forced to use these teeny tiny spots. Thank you. 

Uploaded files:
  • EAFAD404-1EF8-4090-A301-DD5FC055BD6A.jpeg

About my I2C header, the tester beeps when the SCL and SDA pads are touched (they’re not supposed to, right?)  so I’m forced to use these teeny tiny spots. Thank you. 

About my I2C header, tester beeps in continuity mode when the SCL and SDA pads are touched. It’s not supposed to, right? Thank you.

Quote from Norman Aquino on 2021-08-10, 18:58

About my I2C header, tester beeps in continuity mode when the SCL and SDA pads are touched. It’s not supposed to, right? Thank you.

Hello, I don't think they should no. For this card I think you can reference this topic: https://www.elmorlabs.com/forum/topic/help-connecting-evc2sx-with-radeon-rx6000/

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Norman Aquino

That’s the header that I destroyed so I’m thinking of connecting to the tiny dots near the IOR.

 

Uploaded files:
  • DDFC3015-1E4E-4AB2-941F-29E56522552A.jpeg

I can see the SCL (no solder) but there doesn’t seem to be an SDA connector?

Uploaded files:
  • 5EC0B105-1A21-4F87-B32E-40259BED3E3A.jpeg

Hello, either of the below locations should work for you. I'd suggest the exposed copper test points near the XDPE controller. Pictures from https://www.techpowerup.com/review/sapphire-radeon-rx-6800-xt-nitro-plus/3.html

Uploaded files:
  • ir35217_i2c.png
  • xdpe_i2c.png
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Norman Aquino

Thank you very much for this. I managed to hook it up with my paltry soldering skills (I had to wait a day so I could muster the courage to do so LOL). Appreciate it.

Hello, are these errors normal? I always get them. Otherwise, everything seems OK. Thanks.

Uploaded files:
  • evc2-errors.PNG
Quote from Norman Aquino on 2021-08-16, 22:51

Hello, are these errors normal? I always get them. Otherwise, everything seems OK. Thanks.

Hello, yes they're normal. Those errors are common if there are other transactions happening on the bus, for example monitoring software reading values from the VRM controller or the GPU itself reading telemetry.

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Norman Aquino