Advice please on this cheap system

Hi all, got a good deal on this system (refurbished by Asus). how will it go on BF4 and similar games? I know the video card will have to be upgraded, but what about the rest of the system?
Thanks heaps,
Maxx

ASUS CM6730-AU002S Essentio

SPECIFICATIONS

Intel® Core™ i3-2120 (2C, 3.30 GHz) Processor
8GB DDR3 RAM
2TB SATA HDD
Blu-Ray ROM/DVD SuperMulti Double/Dual Layer Optical Disc Drive
NVIDIA® GeForce® GT 620 DVI/VGA/HDMI Out
10/100/1000 LAN, 802.11 b/g/n WLAN
High Definition Audio
Digital Media Card reader
VGA (1), USB 2.0 (6), USB 3.0 (2), RJ-45 (1), Headphone (1), Microphone (1)
Wireless Keyboard and Mouse, Power Cord
Windows® 8 64 bit pre-installed