no, that power supply is a piece of crap. why do people still buy junk like that? a 500w psu with only 29A on the 12v rail, please....that is less than what you would find on antecs 380w model. this is not a 500w psu, its a lie. there are enough articles covering what PSU's are good and which are junk for people to know better. Get a PSU by seasonic, antec, corsair or XFX and you cant go wrong.
Im definetly not gonna overclock or crossfire i have those two 80mm fans and im planning on adding 2 more 80mm. Is that power supply able to support it either that one or the 550 version? And i dont have much room for money.
As long as you aren't OCing yes. x6 is 125W? 6850 is 130ish. Another 50 or so for anything else and you're looking at around 300W. Cutting it close as that PSU can do 336W. You might want to look at his bigger 430W brother.
The BasiQ doesn't list its 12V power cap anymore, and it only has 2 SATA connectors. You'll be hurting for more.