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ASUS ROG Strix RTX 3090

Accessible over I2C using PCON1/PCON2/SCON2 headers (all connected together).

  • MP2888A 0x20 (GPU)
  • MP2888A 0x20? (MSVDD) (seems to be 1x device at 0x20 controlling both GPU + MSVDD)
  • uP9512 0x27 (Memory)

PCB pictures for reference: https://www.techpowerup.com/review/asus-geforce-rtx-3090-strix-oc/3.html

edit: SCON2 is connected to PCON1/2, not SCON1

Uploaded files:
  • Strix.png

 

Quote from elmor on 2020-12-04, 14:55

Accessible over I2C using PCON1/PCON2/SCON1 headers (all connected together).

I had a question about this. Have we found if it's possible to control the MSVDD separately from the GPU voltage?

Continuation testing showed PCON 1/2 are definitely connected but I couldn't get continuation with either for SCON 1. 

The pcb has two MP2888A's, presumably one each for gpu and MSVDD. Really odd to not be able to control them independently from each other.

 

Cheers!

 

Quote from jomama22 on 2021-01-14, 04:49

 

Quote from elmor on 2020-12-04, 14:55

Accessible over I2C using PCON1/PCON2/SCON1 headers (all connected together).

I had a question about this. Have we found if it's possible to control the MSVDD separately from the GPU voltage?

Continuation testing showed PCON 1/2 are definitely connected but I couldn't get continuation with either for SCON 1. 

The pcb has two MP2888A's, presumably one each for gpu and MSVDD. Really odd to not be able to control them independently from each other.

 

Cheers!

 

Not yet, SCON1 is my mistake. It's supposed to be SCON2 that's connected to PCON1/2. I'll update the first post.