New computer for around $500

[bfos33]

This is what I have so far, I just want to know if the parts are compatible and if I'm getting the best bang for my buck. Thank you in advance! (I don't have a CPU cooler, I need help there)

CPU- Intel Pentium G850 Sandy Bridge 2.9GHz LGA 1155 65W Dual-Core Desktop Processor Intel HD Graphics 2000
CPU Cooler- ?
Motherboard- ASRock H77 Pro4/MVP LGA 1155 Intel H77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
Memory- G.SKILL Value Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model
Storage- Western Digital WD Blue WD10EZEX 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5"
Video Card- EVGA 01G-P4-2650-KR GeForce GTX 650 1GB 128-bit GDDR5 PCI Express 3.0 x16
Case- Rosewill CHALLENGER Black Gaming ATX Mid Tower Computer Case
Power Supply- Antec VP-450 450W ATX 12V v2.3
Optical Drive- LG 24X DVD Burner

 

[djangoringo]

You don't need an aftermarket cooler, the cpu comes with a stock one.

I would try to get something like this :
CPU : http://us.ncix.com/products/?sku=75429&promoid=1324 120$
MOBO : http://www.newegg.com/Product/Product.aspx?Item=N82E16813157335 53$
RAM : http://us.ncix.com/products/?sku=74758&promoid=1321 38.50$
HDD : http://us.ncix.com/products/?sku=74462&vpn=WD10EZEX&manufacture=Western%20Digital%20WD&promoid=1139 68$
PSU : http://us.ncix.com/products/?sku=62331 30.95$
GPU : http://us.ncix.com/products/?sku=77797&promoid=1324 150$ after mir
Case : http://www.newegg.com/Product/Product.aspx?Item=N82E16811147023 32$ after promo code.
Optical drive : http://www.newegg.com/Product/Product.aspx?Item=N82E16827151256 16$

It will be slightly more expensive, but it's worth.
If you need to cut the costs down get a 500GB hdd : http://us.ncix.com/products/?sku=63468&promoid=1324