Buying a gaming Computer

Solution
For an i3, the only one that is really worth it is the 6100, it comes up at 42.5 PassMark points per dollar, the 6320 is at 34.3 pts per dollar. For the cost of a 6320, the i5-6400 is a better buy at about $15-20 more, or the i5-6500 at $205 which is about $40 over the i3-6320, but is almost $80 over the i3-6100.

For what you pay for a system vs how long you will be using it, paying $40 for a full rung of CPU level is easily worth it, unless one picks the i3-6100 then you are looking at a much bigger saving.

Keep in mind this is going by overall system use, I would want a system to be able to do fast encoding of HD video also, and in a few years there may be games that can handle multiple cores better.
If you really wanna save money on it, try building your own computer. You generally get much better performance per dollar from custom PC's. If you plan on doing any real gaming, you will also want at least 8gb of ram. The one you have a link for is not very good.
 


I know nothing about the parts or assembling them
 


There are some great sites, such as this one you are on right now to help with this. You can find tutorials all over Youtube on how to put it together. THere are sites like TomsHardware that help answer any questions you have about it, and sites like pcpartpicker.com make it really easy to choose the parts you want and it tells you if they are compatible.
 
This is a decent representation of that build, at retail prices. Cyberpower has deep discounts, will not pay retail prices, so you can expect a 100% markup on anything. This'll put the cost of the build for them around $200 - $250 at most, the rest of what you pay for being overhead, labor etc.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-6500 3.2GHz Quad-Core Processor ($199.98 @ OutletPC)
Motherboard: Gigabyte GA-H110M-A Micro ATX LGA1151 Motherboard ($49.99 @ B&H)
Memory: Crucial 4GB (1 x 4GB) DDR4-2133 Memory ($19.89 @ SuperBiiz)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($46.89 @ OutletPC)
Video Card: MSI GeForce GT 720 1GB Video Card ($37.98 @ Newegg)
Case: Apex SK-386 ATX Mid Tower Case w/300W Power Supply ($32.99 @ Directron)
Optical Drive: LG GH24NSC0B DVD/CD Writer ($12.99 @ Newegg)
Operating System: Microsoft Windows 10 Home OEM (64-bit) ($87.95 @ OutletPC)
Total: $488.66
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-01-31 22:03 EST-0500

This would be a minimum I would use and still well outperform a GT 720 which is barely better than the HD graphics of the cpu.
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i3-6320 3.9GHz Dual-Core Processor ($159.99 @ Directron)
Motherboard: ASRock H170M Pro4 Micro ATX LGA1151 Motherboard ($84.99 @ Newegg)
Memory: G.Skill Ripjaws V Series 8GB (2 x 4GB) DDR4-2400 Memory ($42.88 @ OutletPC)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($46.89 @ OutletPC)
Video Card: MSI Radeon R7 370 2GB Video Card ($123.99 @ NCIX US)
Case: DIYPC Futurus -BK MicroATX Mid Tower Case ($35.99 @ Newegg)
Power Supply: Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply ($34.99 @ Newegg)
Optical Drive: LG GH24NSC0B DVD/CD Writer ($12.99 @ Newegg)
Operating System: Microsoft Windows 10 Home OEM (64-bit) ($87.95 @ OutletPC)
Total: $630.66
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-01-31 22:24 EST-0500
 


Couldn't he go with a Haswell CPU and have money for a better GPU?
 


But the mobo and RAM would be cheaper. And with a budget build, $40-$50 can make a good difference.
 
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($174.89 @ OutletPC)
Motherboard: ASRock H97M PRO4 Micro ATX LGA1150 Motherboard ($79.99 @ SuperBiiz)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($29.99 @ Newegg)
Total: $284.87
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-02-02 00:34 EST-0500
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i3-6320 3.9GHz Dual-Core Processor ($171.87 @ OutletPC)
Motherboard: ASRock Z170M Pro4S Micro ATX LGA1151 Motherboard ($99.99 @ SuperBiiz)
Memory: G.Skill Ripjaws V Series 8GB (2 x 4GB) DDR4-2400 Memory ($42.88 @ OutletPC)
Total: $314.74
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-02-02 00:32 EST-0500

Now take into consideration you have 4 threads at 3.9GHz vrs 4 threads at 3.2GHz, and although the 4460 is a true quad vrs dual core + HT, in anything single threaded, the i3 will perform better. Core for core, the skylake cpus average @5-10% better performance over Haswells, run cooler, and can possibly be slightly overclocked for even better performance on z boards (just heard that, haven't looked up the documentation yet)

For the $30, I'd rather have the skylake cpu, $30 isn't going to get you a better gpu, it'll get a gtx750ti and the r7 370 is actually a better gpu, the 750ti's claim to fame being it's lower power requirements. Most of the high end 750ti's draw @90w, standard versions @60w vrs the 110w of the 370. Just means a 750ti standard will run on a 350w OEM psu as found in most Dell and HP low end pc's. That's not an issue on a new build where the 500w psu is cheaper than most other 400w psus of equitable or better quality
 
For an i3, the only one that is really worth it is the 6100, it comes up at 42.5 PassMark points per dollar, the 6320 is at 34.3 pts per dollar. For the cost of a 6320, the i5-6400 is a better buy at about $15-20 more, or the i5-6500 at $205 which is about $40 over the i3-6320, but is almost $80 over the i3-6100.

For what you pay for a system vs how long you will be using it, paying $40 for a full rung of CPU level is easily worth it, unless one picks the i3-6100 then you are looking at a much bigger saving.

Keep in mind this is going by overall system use, I would want a system to be able to do fast encoding of HD video also, and in a few years there may be games that can handle multiple cores better.
 
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