Gaming PC Upgrade ($800-1000 budget)

Solution
Your over all build is great no need to change all the components. i5-4690K is a great CPU and is still a great performer. Don't waste money on upgrading to i5-6600K there is no big difference.

PCPartPicker part list / Price breakdown by merchant

Memory: Corsair Vengeance Pro 16GB (2 x 8GB) DDR3-2400 Memory ($74.99 @ NCIX US)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($99.99 @ Dell Small Business)
Video Card: Asus GeForce GTX 1080 8GB STRIX Video Card ($629.99 @ SuperBiiz)
Power Supply: Corsair RMx 750W 80+ Gold Certified Fully-Modular ATX Power Supply ($89.99 @ Newegg)
Total: $894.96
Prices include shipping, taxes, and...
basic bad choice: why are you using 2.5 year old tech?

this is a more up-to-date $900 build:

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-6600K 3.5GHz Quad-Core Processor ($227.99 @ SuperBiiz)
CPU Cooler: Deepcool GAMMAXX 400 74.3 CFM CPU Cooler ($24.88 @ OutletPC)
Motherboard: ASRock Z170A-X1/3.1 ATX LGA1151 Motherboard ($97.98 @ Newegg)
Memory: Mushkin Blackline 16GB (2 x 8GB) DDR4-2400 Memory ($59.99 @ Newegg)
Storage: A-Data Premier SP550 480GB 2.5" Solid State Drive ($109.99 @ NCIX US)
Storage: Hitachi Ultrastar 7K3000 2TB 3.5" 7200RPM Internal Hard Drive ($52.00 @ Amazon)
Video Card: Gigabyte Radeon RX 480 8GB Video Card ($239.99 @ SuperBiiz)
Case: Rosewill Galaxy-01 ATX Mid Tower Case ($34.99 @ Newegg)
Power Supply: XFX XT 500W 80+ Bronze Certified ATX Power Supply ($49.99 @ NCIX US)
Total: $897.80
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-10-04 06:49 EDT-0400
 
Your over all build is great no need to change all the components. i5-4690K is a great CPU and is still a great performer. Don't waste money on upgrading to i5-6600K there is no big difference.

PCPartPicker part list / Price breakdown by merchant

Memory: Corsair Vengeance Pro 16GB (2 x 8GB) DDR3-2400 Memory ($74.99 @ NCIX US)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($99.99 @ Dell Small Business)
Video Card: Asus GeForce GTX 1080 8GB STRIX Video Card ($629.99 @ SuperBiiz)
Power Supply: Corsair RMx 750W 80+ Gold Certified Fully-Modular ATX Power Supply ($89.99 @ Newegg)
Total: $894.96
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-10-04 14:18 EDT-0400

The only thing I felt like changing in your build based on quality is the PSU. Went with far better PSU with this next 3-4 times you upgrade(if you upgrade this regularly) you can save money on PSU.

Included a SSD as you don't have. 250GB will be enough to install OS and and have some games on it. If you are still left with good enough margin then you can go for bigger SSD(depends on you).

Upgraded the RAM to a better 16GB 2400Hz model.

Now the biggest upgrade in your build you are getting is GTX1080. You will see a big difference in gaming over the R9 290X.

There is no need to change anything else in your build.
 
Solution


The question is more along the lines of why to stick with older technology. Sure, the i5-4690k is a great performer like any modern i5. The things is... there is no cost savings going with the older technology and yes, Skylake does offer more performance than Haswell Refresh. Not much reason to go with LGA1150 and DDR3 IMHO when build a new rig...

 


$800-1000 is 'whole-new-build' territory
 

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