Convert a Server into a Desktop Gaming PC

I bought an old HP Server DL380 Proliant G7 (200 €) to convert it into a desktop gaming PC. These old servers have a lot of power for a very low price plus mine has 64 GB Ram a DVD Drive and space for up to 8 hard drives in RAID. You also need a 10pin hp server power cable for pci-e 8pin + molex 4 pin + sata 15pin power and a HP Expansion Slot Riser Board Card, 3x PCI-E - ProLiant DL380 G6 G7 - 496057-001 and a HP HDD Backplane Power Cable / Kabel DL380 G6 DL385 G6 - 496070-001 / 463184-001 and