Building a Gaming Computer!

Solution
I see you don't have a price for the motherboard and GPU. Are you carrying these over for free from some previous build? Anyways for the price point of $600ish you can do this build instead.

[PCPartPicker part list](http://pcpartpicker.com/p/YZk2Q7) / [Price breakdown by merchant](http://pcpartpicker.com/p/YZk2Q7/by_merchant/)

Type|Item|Price
:----|:----|:----
**CPU** | [Intel Core i3-6100 3.7GHz Dual-Core Processor](http://pcpartpicker.com/part/intel-cpu-bx80662i36100) | $110.99 @ SuperBiiz
**Motherboard** | [ASRock H170A-X1 ATX LGA1151 Motherboard](http://pcpartpicker.com/part/asrock-motherboard-h170ax1) | $76.98 @ Newegg
**Memory** | [G.Skill Ripjaws V Series 8GB (2 x 4GB) DDR4-2400...
It is not over the top - I would go for something with a bit more power...
Some advice on your build..
You don't need a CPU cooler with that CPU.
That motherboard could handle a much faster CPU, for example a 3570k (in which case you would need the cooler...)
You install memory in pairs, for example a 2x4Gb kit.
Corsair CX PSU are not so good, Seasonic 520W PSU apparently last a lot longer for a similar price.
 
Why the ooollllld i3? The i3-6100 is cheaper, offers better performance, and much newer technology. It's a decent gamer.

Don't use a Corsair CX. Look into something like a Seasonic S12II 520W or XFX 550W.

840 Pro is also old and overpriced. Look at the 850 Evo.

Assuming you already have the graphics card?
 
I see you don't have a price for the motherboard and GPU. Are you carrying these over for free from some previous build? Anyways for the price point of $600ish you can do this build instead.

[PCPartPicker part list](http://pcpartpicker.com/p/YZk2Q7) / [Price breakdown by merchant](http://pcpartpicker.com/p/YZk2Q7/by_merchant/)

Type|Item|Price
:----|:----|:----
**CPU** | [Intel Core i3-6100 3.7GHz Dual-Core Processor](http://pcpartpicker.com/part/intel-cpu-bx80662i36100) | $110.99 @ SuperBiiz
**Motherboard** | [ASRock H170A-X1 ATX LGA1151 Motherboard](http://pcpartpicker.com/part/asrock-motherboard-h170ax1) | $76.98 @ Newegg
**Memory** | [G.Skill Ripjaws V Series 8GB (2 x 4GB) DDR4-2400 Memory](http://pcpartpicker.com/part/gskill-memory-f42400c15d8gvr) | $34.98 @ Newegg
**Storage** | [Kingston SSDNow V300 Series 120GB 2.5" Solid State Drive](http://pcpartpicker.com/part/kingston-internal-hard-drive-sv300s37a120g) | $41.33 @ OutletPC
**Storage** | [Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive](http://pcpartpicker.com/part/western-digital-internal-hard-drive-wd10ezex) | $47.49 @ OutletPC
**Video Card** | [MSI GeForce GTX 950 2GB Video Card](http://pcpartpicker.com/part/msi-video-card-gtx9502gd5oc) | $158.99 @ SuperBiiz
**Case** | [Corsair 200R ATX Mid Tower Case](http://pcpartpicker.com/part/corsair-case-200r) | $59.99 @ Micro Center
**Power Supply** | [SeaSonic 520W 80+ Bronze Certified Fully-Modular ATX Power Supply](http://pcpartpicker.com/part/seasonic-power-supply-m12ii520bronze) | $61.99 @ SuperBiiz
| *Prices include shipping, taxes, rebates, and discounts* |
| **Total** | **$592.74**
| Generated by [PCPartPicker](http://pcpartpicker.com) 2016-05-24 14:37 EDT-0400 |
 
Solution
Here is much better for cheaper using your same Ivy Bridge Mobo and 760 GPU.
You don't need the aftermarket cooler for non-OC CPU, you had last generation SSD drive that was WAY more expensive
Your PSU was low quality.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-3550 3.3GHz Quad-Core Processor ($229.99 @ Amazon)
Motherboard: Asus P8Z77-V PRO ATX LGA1155 Motherboard
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($34.75 @ OutletPC)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($85.79 @ OutletPC)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($45.89 @ OutletPC)
Video Card: Asus GeForce GTX 760 2GB Direct CU II Video Card
Case: NZXT Source 210 (Black) ATX Mid Tower Case ($39.89 @ OutletPC)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($43.98 @ Newegg)
Total: $480.29
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-05-24 14:55 EDT-0400
 
why_wolf's build is good, but wont net you enough improvement to be worth the cost.
And he did not include the cost of a new OS which you would have to buy in order to change out motherboards.
Also, the Kingston V300 drives, after they changed the nram chips, are junk and that is why they are so cheap.

After thinking about it, going skylake is a better way to spend your money instead of sinking money into 3rd gen products.
Here is a skylake building, keeping your GTX 760 for now.
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-6400 2.7GHz Quad-Core Processor ($179.99 @ SuperBiiz)
Motherboard: Gigabyte GA-H110M-A Micro ATX LGA1151 Motherboard ($53.99 @ SuperBiiz)
Memory: G.Skill Ripjaws V Series 8GB (2 x 4GB) DDR4-2133 Memory ($33.89 @ OutletPC)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($85.79 @ OutletPC)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($45.89 @ OutletPC)
Video Card: Asus GeForce GTX 760 2GB Direct CU II Video Card
Case: NZXT Source 210 (Black) ATX Mid Tower Case ($39.89 @ OutletPC)
Power Supply: XFX TS 550W 80+ Bronze Certified ATX Power Supply ($43.98 @ Newegg)
Operating System: Microsoft Windows 10 Home OEM (64-bit) ($82.93 @ Amazon)
Total: $566.35
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-05-24 15:03 EDT-0400