Will it all fit in my computer?

I've seen HP's gaming cases, you'll have enough room and it will all be compatible. I have a CoolMaster GX650w PSU and it performs like a champ, nice and quiet. As long as you buy from a company with a good return policy, that's well known, and that has <4 reviews, you should be fine.
 

Noooooooooooooooooooooooooooooooooooooooo!
 


NOT TRUE. Coolermaster is known for making HORRIBLE PSUs and the extreme power plus series is THE WORST. Do NOT buy one. Most can't even deliver their rated wattage, if they can they run out of spec, and they are prone to burning out. Return policy means NOTHING when your PSU takes the entire PC out with it in a blaze of glory

www.hardwaresecrets.com/article/Cooler-Master-eXtreme-Power-Plus-500-W-Power-Supply-Review/728/10
 
Disadvantages of branded system: Branded systems only give 1year warenty,Assembled system give 3years warenty (2year extra warenty compare to branded).
branded systems give limits for users examples: 1:limited sata ports ,2:low space for extra hdds ,3:upgrade processor also not supported (many processors) because of branded system bios. 4:upgrading gpu also not supported (many gpus )because of branded systems psu and bios limitations. 5:if u r linux user don't spend money for ms os and softwares. etc.....