I just ordered a used an AMD Radeon VII 16GB HBM2, 1750 MHz Boost, 1801 MHz Peak Gaming from ebay.
It is my first upgrade from my PC current AMD, Pitcairn XT, Radeon HD 7870 GHz Edition.
Vendor: AMD (0x1002)
Device: AMD Radeon HD 7800 Series (radeonsi, pitcairn, ACO, DRM 3.61, 6.14.4-x64v2-xanmod1) (0x6818)
Version: 25.2.0
Accelerated: yes
Video memory: 2048MB
Unified memory: no
Preferred profile: core (0x1)
Max core profile version: 4.6
Max compat profile version: 4.6
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.2
Is the upgrade just replacing the GPU and reboot?