Thanks to all for your reply, i do appreciate your comments.
i think am not late yet as there is gonna be coins to mine even if ethereum goes POS. I believe ETC won't follow eth for POS.


one more question

can i use this ASUS P8H61-M LX PLUS DDR3 LGA1155 RAM 16G motherboard with 1 PCI_E x16 and 3x PCI_x1:

http://www.aliexpress.com/item/Free-shipping-100-original-desktop-motherboard-for-ASUS-P8H61-M-LX-PLUS-DDR3-LGA1155-RAM-16G/32691235828.html?spm=2114.13010208.99999999.280.AJ1Vzb


Will this power be ok with the setup (1250 watt power)

http://www.aliexpress.com/item/Original-power-1200W-850W-750W-Silver-certified-power-supply-mainframe-computer-desktop-mute/32699292610.html?spm=2114.13010208.99999999.275.AJ1Vzb


DDR3 RAM (8GB)

http://www.aliexpress.com/item/Brand-New-Sealed-DDR3-1333-1600-PC3-10600-1GB-2GB-4GBDesktop-RAM-Memory-only-compatible-with/32535525249.html?spm=2114.13010208.99999999.268.AJ1Vzb


Core i3 intel CPU 1155 socket

http://www.aliexpress.com/item/Original-Intel-Core-i3-2100-Processor-3-1GHz-3MB-Cache-Dual-Core-Socket-1155-Qual-Core/32664508201.html?spm=2114.13010208.99999999.293.AJ1Vzb  


CPU Cooler Fan Heatsink for 65W Intel Socket LGA 1155

http://www.aliexpress.com/item/CPU-Cooler-Fan-Heatsink-for-65W-Intel-Socket-LGA-1155-1156-Core-i3-i5-i7/32601387707.html?spm=2114.13010208.99999999.262.AJ1Vzb


PCI-E PCIe PCI Express 1x to 16x Riser Card USB 3.0 Extender Cable
but my motherboard USB is 2.0 not 3.0
so will this riser work?

http://www.aliexpress.com/item/1-PCS-Pci-e-Express-1x-to-16x-Extender-Riser-Card-USB-3-0-Extender-Cable/1653140088.html?spm=2114.13010208.99999999.287.AJ1Vzb

GPU

3x  R9 390 on amazon.com



Please is anything missing i didn't include that is necessary?
will all these listed perform well as expected?