HP Pavillion 550SE Desktop Intel Core i7

Selling my sons computer, it needs a new hard drive for security reasons and a new video card.
We paid $675 for this new (see receipt), just hoping someone can use it so it isn't wasted.
These are the specs on is;
Processor: Intel Core i7-6700 * Base Frequency: 3.4 GHz (Up to 4.0 GHz with Turbo Boost)

Cores/Threads: 4 Cores / 8 Threads

Cache: 8 MB SmartCache

Motherboard: Odense (Pegatron manufacturer)

Chipset: Intel H110

Socket: LGA 1151

Memory (RAM): * Capacity: Typically shipped with 8GB or 12GB DDR3L.

Max Expandability: Up to 16 GB (2 x 8GB sticks).

Type: DDR3L-1600 (PC3L-12800).
Optical Drive: Ultra Slim Tray SuperMulti DVD Burner.

Audio: Integrated B&O (Bang & Olufsen) Play with 5.1 channel support.
Power Supply: 180W or 300W internal power supply (depending on the graphics card).

Dimensions: 36.39 x 16.51 x 37.50 cm (14.33 x 6.50 x 14.88 in).

Weight: ~7.15 kg (15.77 lbs).