Building this computer Vs Buying at best buy

[Lynguistic]

Hello all! i would love some feedback on this computer i plan on building this month, it will be my 2nd gaming computer ive owned since the one i have now is getting old(about 5 years)and i think its time to retire.

But ive got a few questions because i dont really like buying stuff online, I have a gaming computer I've picked out on best buy that i like, but ive been hearing bad things about buying from stores and cheap parts that come with.

this is the one at best buy im looking at

CyberPowerPC Gamer Ultra Desktop 8GB Memory 1TB Hard Drive GUA440 - Best Buy


Vs the one i want to build, please let me know if i am leaving anything out, or if you recommend anything else, i really want to try to stay under 800$

*BASE_PRICE: [+610]
BLUETOOTH: None
CAS: Cooler Master HAF 912 Mid-Tower Gaming Case w/ Adjustable HDD Cage (Black Color) [-12]
CASUPGRADE: None
CD: 24X Double Layer Dual Format DVD+-R/+-RW + CD-R/RW Drive (BLACK COLOR)
CD2: None
COOLANT: Standard Coolant
CPU: AMD FX-6100 3.30 GHz Six-Core AM3+ CPU 6MB L2 Cache & Turbo Core Technology [+10]
CS_FAN: Default case fans
ENGRAVING: None
FA_HDD: None
FAN: * CoolerMaster Hyper 212 Evo Gaming Cooling Fan [+4]
FLASHMEDIA: None
FREEBIE_CS: None
FREEBIE_VC: None
FREEBIE_VC2: None
GLASSES: None
HDD: 1TB SATA-III 6.0Gb/s 32MB Cache 7200RPM HDD (Single Drive)
HDD2: None
IEEE_CARD: None
IUSB: Built-in USB 2.0 Ports
KEYBOARD1: AZZA Multimedia USB Gaming Keyboard [+5]
MEMORY: 8GB (4GBx2) DDR3/1600MHz Dual Channel Memory (ADATA XPG V2)
MONITOR: None
MONITOR2: None
MONITOR3: None
MOTHERBOARD: [CrossFireX] MSI 970A-G43 AMD 970 Socket AM3+ ATX Mainboard w/ UEFI Bios, OC Genie II, Winki 3, 7.1 HD Audio, GbLAN, 2 Gen2 PCIe X16, 2 PCIe X1 & 2 PCI
MOUSE1: AZZA Optical 1600dpi Gaming Mouse with Weight Adjustable Cartridge [+4]
NETWORK: Onboard Gigabit LAN Network
OS: Microsoft® Windows 8 (64-bit Edition) [+104]
OVERCLOCK: No Overclocking
POWERSUPPLY: 600 Watts - Corsair CX600 600W 80 PLUS BRONZE Certified Active PFC Power Supply [+25]
RUSH: NO; READY TO SHIP IN 5~10 BUSINESS DAYS
SERVICE: STANDARD WARRANTY: 3-YEAR LIMITED WARRANTY PLUS LIFE-TIME TECHNICAL SUPPORT
SOUND: HIGH DEFINITION ON-BOARD 7.1 AUDIO
SPEAKERS: None
TABLET: None
TEMP: None
TVRC: None
USB: None
USBFLASH: None
USBHD: None
USBX: None
VIDEO: AMD Radeon HD 7770 1GB 16X PCIe 3.0 Video Card [+32] (Major Brand Powered by AMD)
VIDEO2: None
VIDEO3: None
WNC: None
_PRICE: (+782)$



All feedback is very much appreciated

 

[PP Mguire]

For the price, the graphics power in both are terrible. This is where buying a pre-built gets you. 700-800 bucks can get you about 2x the amount of graphics horsepower if you retain the FX6300 in a custom machine.