thats not a quality powersupply id change it as soon as possible. whats ur budget?
the psu is either a hec or cwt. it isnt at seasonic league but it will suffice. currently mine does work flawlessly! i would say it is a tier 3 at least. since it has it it doesnt need to be changed. for a r9 290(x) - gtx 780(ti) then i would change it!