Looking for input on new build

Approximate Purchase Date: e.g.: This week

Budget Range: around 700

System Usage from Most to Least Important: gaming, browsing

Are you buying a monitor: No



Parts to Upgrade: Everything but hard drive.

Do you need to buy OS: Yes


Preferred Website(s) for Parts: newegg

Location: Lowell, IN

Parts Preferences: none

Overclocking: Maybe

SLI or Crossfire: Maybe

Your Monitor Resolution: Not sure its a 22 in acer widescreen monitor

Additional Comments: Any advice acceptable. What i have so far is like $480 plus gotta buy Windows for $100 so about $580 so far. I dont know if i should just upgrade to the quad core or not. Also i see the mobo says Pci 3.0 but the video card says pci 2.1. Is there something wrong here ?

And Most Importantly, Why Are You Upgrading: My computer stopped working i had a newer Hard drive in it though so just using that one.

Mobo: GIGABYTE GA-H61MA-D3V LGA 1155 Intel H61 SATA 6Gb/s USB 3.0 Micro ATX Intel Motherboard $70
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

GPU: SAPPHIRE Radeon HD 6870 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card (100314-3L ) $170
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CPU:Intel Core i3-2100 Sandy Bridge 3.1GHz LGA 1155 65W Dual-Core Desktop Processor Intel HD Graphics 2000 BX80623I32100 $120
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU: Antec BP550 Plus 550W Continuous Power ATX12V V2.2 80 PLUS Certified Modular Active PFC Power Supply $65
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Ram: G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-4GBRL $30
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Optical: LG DVD Burner Black SATA Model GH24NS90 - OEM $18
http://www.newegg.com/Product/Product.aspx?Item=N82E168...