Will this setup work just fine and safe?

Hi there :grinning:

This would be my first mining rig, and I'm just wondering if all of these parts would run flawlessly, and safe.

MB: Gigabyte GA-970A (with 5 GPU slots)

CPU: AMD FX-4100

HDD: 230GB harddrive (quite old)

GPU: 2x Radeon R9 280X Sapphire Dual-X 3GB OC Edition
3x Radeon R9 280X Sapphire Vapor-X 3GB

PSU for the GPU's: 2400 Watt Power Supply Kit) (The 280X cards consume 250W each. Which is 1250W. But, might use it for a later rig with THIS MB which has 12x pci slots)

Powered Risers: Link to eBay

PSU for the MB: SilverPower 500W (Got this one for free, but I thought that I might need to buy a newer one)

And an homemade DVI-VGA dummy plug

Just recently read that some powered risers could burn, but did i order the "Safe" ones? :sweat_smile:

Thanks!