Xx_MadJack_xX

This is simply the stock specs for the memory controller. OP would be fine with 3200 Mhz RAM thanks to Intel XMP profiles.
 
Also a 620W+ PSU will be sufficient, so long as the CPU is not overclocked. Skylake-X CPUs are very power-hungry (and HOT) when overclocked, and especially so when overvolted. I would highly recommend going for at least the EVGA 650 G2/G3 PSU though. Well worth the extra money.

Some Ram Sets are Known To have Some Trouble with Ryzen Like some Like to Be Meh and Some Work Fine But see what others Say But it Could be Defective Ram

in this Situation the CPU Is a Clear Bottleneck as it cant Keep up with such a Fast GPU

I Think 1440p No Matter What you Do may be a Bit Far for that CPU, but If I had to Recommend I would do the Same as @samcool55 and go with a RX 580 or 570 but Even then 1440p is a Long Shot on that CPU

Enable the IGPU in your bios.
Per your specific MoBo the instruction manual should have instructions on how to do so. 

That is what I would do. Trying to plug into the motherboard when you have a graphics card is always gunna be buggy. 

Its a lot Cheaper to build one if you watch Build Guides Of Linus when he Builds Systems he goes through it Step By Step
 
Building a PC aint as hard as it Seems

PCPartPicker part list: https://uk.pcpartpicker.com/list/LmwfxY
Price breakdown by merchant: https://uk.pcpartpicker.com/list/LmwfxY/by_merchant/
CPU: Intel Core i5-6500 3.2GHz Quad-Core Processor  (£185.75 @ Amazon UK) 
Motherboard: *MSI H170A PC Mate ATX LGA1151 Motherboard  (£92.97 @ Amazon UK) 
Memory: *Crucial Ballistix Sport 8GB (1 x 8GB) DDR4-2400 Memory  (£32.39 @ BT Shop) 
Storage: *SK hynix SL308 250GB 2.5" Solid State Drive  (£62.98 @ Ebuyer) 
Storage: *Toshiba 2TB 3.5" 7200RPM Internal Hard Drive  (£35.94 @ Aria PC) 
Video Card: *Palit GeForce GTX 1060 6GB 6GB Dual Video Card  (£224.99 @ Aria PC) 
Power Supply: *SeaSonic 520W 80+ Bronze Certified Fully-Modular ATX Power Supply  (£70.40 @ Alza) 
Total: £705.42
Prices include shipping, taxes, and discounts when available
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2016-12-21 21:56 GMT+0000

Download one of the above tools, check online to see how far others have pushed the GPU and start with half that to be safe.

evga precisionX is what i use

Should have enough power to hold it but Dont over clock to much 

Zipties to bundle unused cables. 

I would Recomend Getting a Fully Modular PSU so that way you Can put in the Cables you Need so you dont have 10 Spare Cables 

Id Sat you May have a GPU Bottle neck not a CPU 

it may BottleNeck sometimes i would Recomend getting a 6300 or a 8350 or you could Wait to so what the AMD Zen Has to Offer 

the FX 9000 series in my opinion is the Rebrand of the 8000 Series CPU aint worth it Wait for more info on the Zen 

No idea

Did you transfer a HDD or an ODD from the old computer into this one? A malfunctioning Sata device could cause an issue like this.

I personally would have a Gigabyte G1 or MSI or Asus Strix 
 
personal Prefrence 

https://pcpartpicker.com/product/7RKhP6/gigabyte-geforce-gtx-1060-6gb-windforce-oc-6g-video-card-gv-n1060wf2oc-6gd

you will be just fine with that monitor 

i think its a good Pair, you will strugle to get 144hz out of it but i would swap out the Z170 board as you have a locked cpu to save some cash and get a better gpu like a 6gb 1060

PCPartPicker
The 1060 6GB will last you longer.
No need for z170 mb.

i think its a good Pair, you will strugle to get 144hz out of it but i would swap out the Z170 board as you have a locked cpu to save some cash and get a better gpu like a 6gb 1060

You added the  Corsair Builder 500W 80+ Bronze Certified ATX Power Supply to my list. The retailer i am purchasing from does not have it available (i live in Latvia) Would  a Corsair ATX 2.31 VS Series 550W CP-9020097-EU be a good alternative?
Thank you very much for the advice. i have adjusted my list