Upgrading 970 to 1070

[Oggis]

Hey. So i just bought a new graphics card and i'm at a dead end. My old card was a gtx 970 and it used 2 6pin connectors (5 yellow wires) and i just got a 1070 which has a single 8pin connection. I was reading a bit and i'm not sure if i should use a 2x 6pin to 1x 8pin adapter or just get a new PSU.

My specs at the moment are:

PSU - Thermaltake TR2 Challenger 500w
Motherboard - Asus Z170-P
PCU - i7 6700
RAM - 2x Kingston HyperX Fury 8gb 2,4GHz
Current GPU - MSI GTX970 4Gb

 

[Oggis]

Basically posted similar threads on other sites as well, and the conclusion is that i gotta get a new PSU which has 6+2(8pin) PCI-E conections. My one was trash to be fair and i guess it's better to be safe than sorry. My cable management won't be happy though.