$600 PC build OS Included

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i3-4160 3.6GHz Dual-Core Processor ($107.99 @ SuperBiiz)
Motherboard: ASRock H97 Anniversary ATX LGA1150 Motherboard ($66.99 @ SuperBiiz)
Memory: Crucial Ballistix Sport 8GB (2 x 4GB) DDR3-1600 Memory ($44.49 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($43.99 @ SuperBiiz)
Video Card: Sapphire Radeon R9 270X 2GB Dual-X Video Card ($129.99 @ Newegg)
Case: BitFenix Neos White/Purple ATX Mid Tower Case ($48.99 @ SuperBiiz)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($53.99 @ SuperBiiz)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($13.99 @ SuperBiiz)
Operating System: Microsoft Windows 7 Home Premium SP1 OEM (64-bit) ($86.75 @ OutletPC)
Total: $597.17
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-08-05 16:24 EDT-0400
 

madchemist83

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PCPartPicker part list / Price breakdown by merchant

CPU: Intel Pentium G3258 3.2GHz Dual-Core Processor ($49.99 @ Micro Center)
Motherboard: MSI H81M-P33 Micro ATX LGA1150 Motherboard ($40.99 @ SuperBiiz)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($44.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($49.99 @ NCIX US)
Video Card: MSI GeForce GTX 960 2GB Video Card ($164.99 @ SuperBiiz)
Case: Corsair 200R ATX Mid Tower Case ($64.99 @ NCIX US)
Power Supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($49.99 @ NCIX US)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($13.99 @ SuperBiiz)
Operating System: Microsoft Windows 7 Home Premium SP1 OEM (64-bit) ($86.75 @ OutletPC)
Case Fan: Xigmatek CLF-F1455 60.5 CFM 140mm Fan ($8.99 @ Amazon)
Case Fan: Xigmatek CLF-F1455 60.5 CFM 140mm Fan ($8.99 @ Amazon)
Total: $584.65
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-08-06 11:36 EDT-0400
 

madchemist83

Distinguished
I was building it based on gaming part.
From techspot

The problem for AMD, which we have seen time and time again, is core efficiency. Having more cores available isn't much use if they are slower. Moreover, just because a game can use four cores (and all the games we tested could) doesn't mean a dual-core will be inferior if two cores are working harder than four.
Most of the games saw the Athlon X4 860K working all four cores at 70% capacity or greater, with a few such as Civilization: Beyond Earth, Thief, Battlefield Hardline and Battlefield 4 reaching 90%. Despite that, in all of those games the Pentium G3258 was as fast or faster than the Athlon X4 860K.
Focusing on the overclocked 4.4GHz results we found that on average the Pentium G3258 was 15% faster than the Athlon X4 860K when paired with the Radeon R9 285 and 14% faster with the GeForce GTX 960.
If we remove Assassin's Creed Unity results, which saw the Athlon X4 860K deliver abnormally low results, the G3258 was still 13% faster with the R9 285 and 9% faster with the GTX 960.
 


The i3 in my build is 2 core 2 hyperthread, so it can handle 4 threads at a time, it will outperform the X4 860K by a decent amount.
 
What do you mean amount of threads is irrelevant? Most games use 4 or even more threads now, the i3 will perform better than the g3258 overclocked to 4.5Ghz+ in a lot of games because of the extra threads.

http://www.anandtech.com/show/8232/overclockable-pentium-anniversary-edition-review-the-intel-pentium-g3258-ae

Scroll down to the gaming benchmarks you will see even with the g3258 overclocked to 4.7Ghz it falls behind the i3 in performance... And with that high of an overclocking you will need to buy an aftermarket cooler making the cost between the CPUs pretty much the same. The i3 will also use a fair amount less power and takes no overclocking to beat the fully overclocked g3258.