All is fully functional. HDD screws included in the case.

Specs:

- HP ProDesk 600 G1

- Intel Core i5-4590

- 4×4GB DDR3 1600mhz

- 256GB SATA SSD

- Dell R7 450 4GB ≈ GT 1030

- 802.11n WiFi card - Atheros AR5B22