Is this a decent PSU?

[Monkey]

Hey everyone,
I need to order a PSU ASAP because my build parts have arrived but.. I need to find a PSU now. soo.. would this PSU be a decent one?

Coolmax CX-550B Black 550-Watt ATX 120mm Fan SATA-Ready 2024-Pin Power Supply at TigerDirect.com

CPU:e7200
GPU: hd 4850
MOBO: biostar p43
RAM: ocz platinum revision 2- 2 gigs

Also, does thermal grease matter that much or will any brand work ?

 

[Ventriac]

Corsair VX550W 550W ATX Power Supply - SLI-Ready, SATA-Ready CMPSU-550 at TigerDirect.com

is a little bit higher quality, and is a highly recommended psu brand on these forums.

 

[Fat.Clown]

some thermal compound are more effective than others
so overclockers prefer better ones to keep temperatures down to achieve higher overclock

 

[veg1992]

Coolmax is an avoid brand on our PSU recommendation list

Get a Corsair 550vx or 450vx

 

[baron5]

or if your on a budget, rosewill is good.

 

[AP4LIFETN]

definitely get the corsair, budget or not u need consistent power