This mining rig is sold "as-is", and has been tested before shipping, up to 5.1 MH/s for scrypt mining, which is 5100 KH/s.
This scrypt mining rig is made up of the following parts:
4x MSi R9 280X 3GB Gaming Edition Graphics Cards
1x Sapphire R9 290 Battlefield Edition 4GB Graphics Card
1x Asus R9 290 4GB Graphics Card
1x Sapphire Dual-X R9 270X 2GB Graphics Card
1x Thermaltake Smart 650W 80 PLUS Bronze PSU
2x Rosewill Fortress 750W Platinum Certified 80 PLUS PSUs
1x Corsair 8GB RAM
1x 120GB Crucial SSD - Solid State Drive
1x Gigabyte F2A88X-UP4 Motherboard
1x AMD A10 6700 Quad-Core Processor APU with built in (integrated) GPU, 3.7-4.3 GHz
2x 140mm fans
1x 120mm fan
1x Artic Cooling fan
4x USB PCIe Powered Risers (Sata) (60cm)
4x 1x to 16x PCIe Powered Risers (Molex)
1x 16x to 16x PCIe Powered Riser (Molex)