I believe those use MXM GPU'S, AKA Laptop Socket GPU's, you could replace them but those GPU's are much harder to find in bulk.
They are desktop RX 470 4GB but fanless and with only HDMI output, which is not used. They use a 6-pin power connectors.
I think its just a box wit a 8 gpu motherboard and fanless gpus wit 5 fans on the outside, if it is you can put some other gpus, but i think the inside connectors are 6 pin not 8 pin for power.
If you dont want to mess with it and interested in selling contact me
You are right. I was thinking it was some sort of custom PCB/motherboard and it wouldn't accept any other card besides what it shipped with, considering the variant of RX 470 in it isn't standard (no fans, no fan pin, no other output besides HDMI, no brackets to take it out of the Pandaminer and mount it inside a PC). Not interested in selling it, I just got it and I want to learn, since I have very little experience in GPU mining. Thank you for the offer though.
Save yourself some trouble and just go mine RVN with them using teamredminer and call it a day.
It's mining RVN, I was just wondering of the possibility to upgrade it in the future. I don't have any other GPUs and was curios if I could ever upgrade it but it seems that the only way to know for sure is to try it myself. If someone else tried it already, I couldn't find the results online.
Thank you all for your input, I'll try and come back to this post with the results of my upgrade attempt. Will try with an RX 570 first and see how it goes.
Cheers!