Problems since RX470 Upgrade

[xSHADOWx]

I recently got a RX 470 Video card and ever since then I've been having some trouble with my PC. The first is that when my PC is turned off and I go to boot it back up it won't boot, the power comes on but no video, somethings not playing well together. I hold the power button down and then reboot again and it works perfectly fine.. until problem 2 starts. I have three Drives.. a SSD drive for booting and two HDD's for storage and such.. One of them I have listed as A: Drive and it randomly will just stop working.. nothing will read from it.. like its not plugged in. Only a reboot will fix it.. I'm not sure what's going on here. Never had these troubles til after I got the RX 470. Could it a power shortage? I'm only using 500W EVGA PS But I thought that would be enough...

RIght now.. as I write this.. both my HDD's are not even showing in Windows Explorer

Here's a List of system specs
AMD FX 8350 8 Core CPU Hyper 212 Evo CPU Cooler MSI 970 Gaming Motherboard 16GB HyperX Fury @ 1866MHz MSI RX 470 4gb Vid Card PNY 120gb SSD Boot Drive 2 x 1TB Western Digital HD Corsair 780T Case Avermedia C985 Live Gamer HD EVGA 500W Power Supply Benq 24" Monitor 2x LG 25" Ultrawide Monitors

[SageOfSpice]

You should be alright.

I've looked up the individual components, and used CoolerMaster's utility to check power consumption, and provided that your PSU is functioning correctly, it should be adequate.

 

What I would do is tear the computer down, and only plug in base essentials.

 

Just the CPU, Motherboard, 1 stick of ram, and 1 HDD.

Try booting it a few times with that. If it boots fine, add in the GPU.