@Bwser675,
Here is your computer. Video on removing/replacing PSU in the 880 series. (Step-by-step).
I do not know how much power you need, and for what? Maybe a 650W would suffice? Depends on answer.😊
Sources from a 2018 reply: "You might consider the 750 watt platinum rated power supply HP offers in the 880 series. It's will have all of the proper connectors. HP Part Surfer has it in stock. PN 919937-800".
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HP Envy 8 5010 Tablet
(2) HP DV7t i7 3160QM 2.3Ghz 8GB
Printer -- HP OfficeJet Pro 8620 Legal
Custom Asus Z97D, I7-4790k, 16GB RAM, WIN10 Pro 64bit, ZOTAC GTX1080 AMP Extreme 3 fan 8GB RAM, 500GB SSD, Asus PB287 4k monitor, Rosewill Blackhawk case and 750W OCZ PSU.