Amazon gives me a good price for this set up (I have 850W power supply)

Crucial Ballistix Sport 8GB Kit (4GBx2) DDR3 1600 (PC3-12800) 240-Pin UDIMM Memory BLS2KIT4G3D1609DS1S00/BLS2CP4G3D1609DS1S00 by Crucial
$33.98

ASRock Motherboard ATX DDR3 1066 LGA 1150 H81 PRO BTC by ASRock
$72.09

Intel Pentium Processor G3240 (3M Cache, 3.10 GHz) BX80646G3240 by Intel
$58.94


Patriot Torch 120GB SATA 3 2.5 (7mm height) Solid State Drive - With Transfer Speeds of Up-To 555 MB/s read and 535 MB/s write by Patriot
$39.99

Subtotal (4 items): $205.00

Should I start from loading with 2 R9 390 and later add 2 more?

Is this card good?

XFX DOUBLE DISSIPATION R9 390 1015MHZ XXX OC 8GB DDR5 DISPLAYPORT HDMI DUAL DVI
$320