Give us the whole build and we'll critique it. Tier 1 makers are Seasonic / XFX / Corsair / Antec/ some Enermax ocz pc&p units. Rosewill and CM is usually tier 3 4 5 (anything under 4 is utter crap).
There is a chart somewhere.. i'll try and dig it up for you.
*edit* nvm the chart is outdated.
well so far i got:
HDD: seagate 500gb
cpu: AMD Phenom II X6
MOTHERBOARD: asrock amd 970 extreme3
VIDEO CARD: sapphire Radeon HD 6850
psu: rosewill 530w green series
CASE: rosewill challenger
RAM: GSKILL 8 GB ddr3 1333