Ferrariassassin :
Maybe it just says it is not Haswell ready by mistake. I just got confused because if you go to specifications on newegg.com on that model and scroll down it says haswell ready-NO lol it just confused me. But i hope the 550w is enough for everything haha
That's a Newegg.com error.
CPU-i5-4590 .......................................... 72 Watts
GPU-MSI R9 270 GAMING 2GB 256-Bit ... 195.7 Watts maximum at factory clock speeds while running FurMark Stability Testing
MB-ASRock H97M Pro4 LGA 1150 ........... 38 Watts
Memory-2X4GB RAM ............................... 6 Watts
HDD-WD 1TB .......................................... 10 Watts
DVD-One Asus DVD Drive ....................... 32 Watts
3 Case cooling fans ............................... 13 Watts
Total ...................................................... 366 Watts
The XFX TS Series P1550SXXB9 550W should be more than sufficient to power that system configuration unless there are some components missing from your specs.