Various re-seller have been flooding the market with these Z400 units for less than $100. As windows 7 ceases update support on Jan 14, 2020, The Sata ports are 3GB/s, not the newer 6GB/s. See reference listed here, page 5.
That unit is 10 years old, starting out with Vista, and is not compatible with modern graphic cards. There have been troubling reports of attempts to attach an SSD drive to port 0 (the boot port).
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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.