I recieved second opinion on my build. Would like to verify why.

[Deleted]

So my initial 3D Modeling/Rendering was this:

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-5820K 3.3GHz 6-Core Processor (£357.99 @ Ebuyer)
CPU Cooler: be quiet! Dark Rock 3 67.8 CFM Fluid Dynamic Bearing CPU Cooler (£55.96 @ CCL Computers)
Thermal Compound: Arctic Silver 5 High-Density Polysynthetic Silver 3.5g Thermal Paste (£10.81 @ CCL Computers)
Motherboard: Asus X99-A ATX LGA2011-3 Motherboard (£204.00 @ Amazon UK)
Memory: Kingston HyperX Fury Black 32GB (4 x 8GB) DDR4-2400 Memory (£135.99 @ Ebuyer)
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive (£133.08 @ Aria PC)
Storage: Western Digital Blue 3TB 3.5" 5400RPM Internal Hard Drive (£82.98 @ Amazon UK)
Video Card: MSI GeForce GTX 980 Ti 6GB Video Card (£499.22 @ Amazon UK)
Case: Phanteks Enthoo Pro M ATX Mid Tower Case (£59.83 @ CCL Computers)
Power Supply: EVGA SuperNOVA G2 650W 80+ Gold Certified Fully-Modular ATX Power Supply (£79.99 @ Amazon UK)
Operating System: Microsoft Windows 10 Home OEM 64-bit (£82.98 @ Ebuyer)
Monitor: BenQ GW2765HT 27.0" 60Hz Monitor (£294.01 @ Amazon UK)
Keyboard: Logitech G710 Plus Wired Gaming Keyboard
Speakers: Logitech Z523 40W 2.1ch Speakers (£85.22 @ Misco UK)
Total: £2082.06
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-09-17 16:56 BST+0100

The pieces of advice I got were the following:

Change the motherboard to an X99 chipset motherboard that supports M.2 PCI Gen 3 slot/s
Change the Samsung EVO 850 to a Samsung SM951, SM961 or SM950 Pro AHCI M.2 SSD
If you check the performance of the above SSDs they are much better performing than a SATA SSD
Change the GTX980Ti to a GTX1070 8GB

Now I understand the graphics card and the SSD because both of them simply perform better.
However I'm not sure what he meant by the motherboard nor what this talk about M.2 PCI support is all about.

Granted I did forgot to mention to him what I plan to use it for so whatever opinion he gave me may not have that fact in mind.

Can anyone elaborate. Especially about the Motherboard change?

[Thunderball]

1) Your motherboard already supports that.
2) While those SSDs are nominally faster you wont normally get any benefits out of them unless you constantly read and write huge amounts of data on your own storage. External storage options dont allow such transfer rates so you will basically can only get a benefit when reading/writing your M.2 SSD.
3) Fair point but you shouldnt blame whoever originally offered this build for you. New NVidia cards are only out for a little over 3 months.

Recommended list below:

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-5820K 3.3GHz 6-Core Processor (£357.99 @ Ebuyer)
CPU Cooler: Phanteks PH-TC14PE_BK 78.1 CFM CPU Cooler (£53.46 @ Amazon UK)
Motherboard: Asus X99-A II ATX LGA2011-3 Motherboard (£227.57 @ Ebuyer)
Memory: Corsair Vengeance LPX 32GB (4 x 8GB) DDR4-3000 Memory (£141.07 @ Amazon UK)
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive (£133.08 @ Aria PC)
Storage: Western Digital Blue 3TB 3.5" 5400RPM Internal Hard Drive (£82.98 @ Amazon UK)
Video Card: Gigabyte GeForce GTX 1070 8GB G1 Gaming Video Card (£409.97 @ Amazon UK)
Case: Phanteks Enthoo Pro M ATX Mid Tower Case (£59.83 @ CCL Computers)
Power Supply: EVGA SuperNOVA G2 650W 80+ Gold Certified Fully-Modular ATX Power Supply (£79.99 @ Amazon UK)
Operating System: Microsoft Windows 10 Home OEM 64-bit (£82.98 @ Ebuyer)
Case Fan: Phanteks PH-F140SP_BK 82.1 CFM 140mm Fan (£12.95 @ Amazon UK)
Case Fan: Phanteks PH-F140SP_BK 82.1 CFM 140mm Fan (£12.95 @ Amazon UK)
Monitor: BenQ GW2765HT 27.0" 60Hz Monitor (£294.01 @ Amazon UK)
Keyboard: Cooler Master CM Storm QuickFire TK Wired Mini Keyboard (£50.80 @ Amazon UK)
Speakers: Logitech Z523 40W 2.1ch Speakers (£85.22 @ Misco UK)
Total: £2084.85
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-09-17 19:10 BST+0100