Need help buying/building a new gaming PC (~$800)

Svensander

Honorable
Jun 29, 2013
50
0
10,640
Hi.
My 7 year old PC just died today (no wonder) and i have about $600 to spend on a new one. I'm not so sure about building it myself, so i thought about buying this PC. the specs are(not gonna give u the link, cuz it's in a different language :p)
CPU: Intel Core i5 3470 3.2GHz
RAM: 8GB 1600 Mhz DDR3
Motherboard: Intel B75
GPU: GTX 650ti 2GB
HDD: 1TB
PSU: 450W
Case:Bitfenix Shinobi
and it costs 619.00 €, which is $805,5.

would it be cheaper to buy the components separately?
also, how do u think this PC would perform games like Skyrim/assassins creed 3/NFS shift on high-ultra settings?

many thanks :)