A:Answer I believe that link is old (and doesn't work). This I believe is the spec sheet but showing the wrong graphics card.
https://support.hp.com/rs-en/document/c07922800
Shows direct upgrade paths to the following CPU upgrades:
Motherboard supports the following processor upgrades:
Processor
TDP
AMD Ryzen 5 5600G (Cezanne) 3.9 GHz base clock, up to 4.4 GHz max boost clock, 16 MB L3 cache, 6 cores
65 W
AMD Ryzen 5 5600X (Vermeer) 3.7 GHz base clock, up to 4.6 GHz max boost clock, 32 MB L3 cache, 6 cores
105 W
AMD Ryzen 7 5700G (Cezanne) 3.8 GHz base clock, up to 4.6 GHz max boost clock, 16 MB L3 cache, 8 cores
65 W
AMD Ryzen 7 5800X (Vermeer) 3.8 GHz base clock, up to 4.7 GHz max boost clock, 32 MB L3 cache, 8 cores
105 W
AMD Ryzen 9 5900X (Vermeer) 3.7 GHz base clock, up to 4.8 GHz max boost clock, 64 MB L3 cache, 12 cores
105 W
However, it doesn't say anything about how much wattage headroom is left to power a CPU that draws 40 more watts.
Componentwise at the $699 price from my research it seems like you are getting about $1000 (maybe a bit more) worth of gear. I certainly don't think $1350 reflects its true value since GPUs have dropped significantly.
Curious that it includes a 500G APU and RX 6600XT. I wish you could delete the RX 6600XT (to add your own GPU) or use the APU as is.
Almost what I'm looking for ...