What should I buy, Gaming Laptops

I am going to buy a laptop in the near future and I am intending to use it primarily for gaming please tell me if the laptops are going to be powerful enough to do what i'm asking and which of the two will be better and if it will be a big enough difference for the price. I don't really know if my sub category is right. I'm asking for help meaning i'm not an expert.

I would like to be able to play the following games at the corresponding settings and still maintain a good FPS (30+).

Minecraft - High settings
ArmA 2 - medium settings
ArmA 3 - medium settings

Both are refurbs

these are the two laptops i am looking at:

Lenovo IdeaPad Y470 (Gaming Laptop)

Processor Intel Core i7-2670QM processor (quad-core, 2.20GHz, 6MB cache)
Operating System Genuine Windows® 7 Home Premium 64 - English
Total Memory 8GB (2 X 4GB) PC3-10600 DDR3 1333MHz SDRAM SODIMM Memory
Hard Drive 750GB, 5400RPM Serial ATA 2.5" Hard Drive
Display 14.0" HD WXGA (1366 X 768) LED Backlight w/ Camera"
Graphics AMD Radeon HD 7690M
Optical Device DVD Recordable 8x Max Dual Layer
Keyboard/Pointing Device Multi-Touch Touchpad
Battery 6 Cell Lithium Ion Battery (Up to 4 Hours Run Time)
Ethernet/Wireless Intel® Centrino Wireless-N 1000 (1x2 bgn)
Bluetooth Yes
Integrated Camera Yes
Color Black
Fingerprint Reader No
Form Factor Laptop
Price $549.99


Lenovo Y480 Gaming Laptop

Processor Intel Core i7-3610QM processor (4 cores / 8 threads, 2.30GHz, 6MB cache)( )
Operating system Windows 7 Home Premium 64 - English
Graphics Intel HD Graphics 4000 in processor, and NVIDIA GeForce® GT 640M LE Graphics
Memory 8GB (2 X 4GB) PC3-12800 DDR3 1600MHz SDRAM SODIMM Memory
Display 14.0" WXGA (1366 X 768) TFT color, VibrantView, LED Backlight w/720p HD Camera"
Pointing device One-piece touchpad, multi-touch
Hard Drive 750GB, 5400RPM Serial ATA Hard Drives
Optical Drive DVD Burner
Battery 6 Cell Lithium Ion Battery (Up to 4 Hours Run Time)
Finger Print Reader No Fingerprint Reader
Warranty 1 Year Standard Depot Warranty
Form Factor Laptop - Dark Gray with brushed metal
Price $649.00