Refined your build a bit.
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel Core i5-7500 3.4GHz Quad-Core Processor ($196.33 @ OutletPC)
Motherboard: Gigabyte GA-B250M-D3H Micro ATX LGA1151 Motherboard ($83.99 @ SuperBiiz)
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-2400 Memory ($113.99 @ Newegg)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($97.88 @ OutletPC)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($49.33 @ OutletPC)
Video Card: MSI GeForce GTX 1060 3GB 3GB GAMING X 3G Video Card ($224.99 @ B&H)
Case: Thermaltake View 27 ATX Mid Tower Case ($64.99 @ Newegg)
Power Supply: SeaSonic G 550W 80+ Gold Certified Semi-Modular ATX Power Supply ($69.99 @ Newegg)
Total: $901.49
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-02-20 10:28 EST-0500
Changes made
RAM: 2x 8GB 3000 Mhz -> 2x 8GB 2400 Mhz
PSU: Corsair CXM550 -> Seasonic G-550
Reasons why
RAM: Your MoBo supports max 2400 Mhz RAM and it's pointless to pay more for a faster RAM that can only work at 2400 Mhz. So, replaced your RAM with 2400 Mhz one.
PSU: Corsair CXM550 is mediocre quality PSU. Replaced the PSU with good quality unit that comes directly from the best PSU OEM, Seasonic.
And now, for Q&A.
1. Your MoBo does have built-in soundcard, that has High Definition audio, uses Realtek ALC892 audio codec, supports 2/4/5.1/7.1-channel audio and also has S/PDIF line out for connecting home theater to your PC.
2. To know how many watts you need in your PSU, you need to calculate the total wattage of your PC. Your GPU can use up to 150W. The rest of the system uses about 200W (usually less). All combined, your system's peak would be about 350W. Here, the 500W range PSU will do fine. Also, it's good to pick a PSU where the total load of your system is 50% to 80% of the total wattage of your PSU.
Since PSU is the most important component in the PC, i replaced yours with better build quality PSU.
3. Your selected case has 3.5mm headphone jack, 3.5mm microphone jack, 2x USB 2.0 ports and 1x USB 3.0 port on it's front panel.
Image:
On the rear side of your PC (thanks to your MoBo), you have additional 4x USB 3.0 ports, 2x USB 2.0 ports and 6x audio jacks (Center/Subwoofer Speaker Out, Rear Speaker Out, Side Speaker Out, Line In, Line Out, Mic In).