Yes it is, system with R9 270x needs 500w PSU with 24 Amps on 12v rail. so CM B600 should be enough its not very quality PSU but it shoud be good enough. http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html
In the future if you will be upgrading PSU get one from Tier 1 or 2.
Yes it is, system with R9 270x needs 500w PSU with 24 Amps on 12v rail. so CM B600 should be enough its not very quality PSU but it shoud be good enough. http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html
In the future if you will be upgrading PSU get one from Tier 1 or 2.