The GPU is a bit slow and lacking memory for 1440 gaming. Also you are going to have a heck of a time trying to find one in stock for anywhere near that price.
For 2560x1440 or 2560x1080 you really want at least a GTX 1070. Given how ridiculous prices are right now. I would look at a GTX 1080. They aren't great for crypto mining compared to the cost and power usage of a GTX 1070 but are much better for gaming. So, their prices haven't gone up much at all.
This build costs a bit more but will do quite well at 2560x1440. Plus you can find all the parts. You are going to have a hard time finding any GTX 1060 under $375 CAD. At such a ridiculously inflated price. A GTX 1080 makes much more sense.
Yea I know the prices suck. As in the here and now if you want a gaming system. Either go low end with a GTX 1050 Ti or high end with a GTX 1080. Mid range prices are ridiculously high.
PCPartPicker part list /
Price breakdown by merchant
CPU: AMD - Ryzen 5 1600 3.2GHz 6-Core Processor ($280.49 @ DirectCanada)
Motherboard: MSI - B350 PC MATE ATX AM4 Motherboard ($129.99 @ Newegg Canada)
Memory: GeIL - EVO POTENZA 16GB (2 x 8GB) DDR4-2400 Memory ($129.99 @ Newegg Canada)
Storage: SanDisk - SSD PLUS 240GB 2.5" Solid State Drive ($112.99 @ Amazon Canada)
Video Card: Asus - GeForce GTX 1080 8GB TURBO Video Card ($655.84 @ Amazon Canada)
Case: BitFenix - Comrade ATX Mid Tower Case ($37.96 @ DirectCanada)
Power Supply: SeaSonic - S12II 620W 80+ Bronze Certified ATX Power Supply ($69.99 @ Newegg Canada)
Total: $1417.25
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-04 17:12 EDT-0400