Does this have a VESA mount?

Yes, I have mine mounted via the VESA mount.

does it come with cords to connect to the computer

It comes with HDMI cords, so if your computer graphics card has an HDMI output jacket, yes you can connect it to your computer.

Will it work at 60hz with Intel 4600 HD GPU on my 4770k? My motherboard has displayport1.2 output it says it can output 3840x2160 60hz

If your motherboard says so then the monitor will work @60hz 4k. The monitor doesn't care who or what generates the signal, it cares only what type of signal it receives at its end of the DP cable. But once the monitor is out of the box, you need to manually navigate its On Screen Display to select DP 1.2 because it comes by default set to DP 1.1 and 1.1 doesn't support 60hz.

I'm considering this monitor for use with PhotoShop CS6. Will I actually get the benefit of UHD or do I also need to get a new Graphics Card?

I agree with everything that's already been said above, but I think it's also crazy important to note that 4K support is still sorely lacking on the software side of things. If you run a Mac, its desktop environment is automatically upscaled so most UI elements will, also automatically, look sharper.Windows has built in UI scaling too and you can get it done via Control Panel, but it's not a universal implementation so the UI elements get super small, and most icons (eg desktop, inside softwares like Microsoft Excel) get major pixelation / placement issues. This really sucks for people like me, who rely on a Windows system for 99% of the time every day. Even something as simple as text on a website will vary greatly in sharpness depending on the browser you use and whether it has properly implemented 4K support.For the time being, I'd say try stick with your current monitor for another year or so. Developers need the time to adjust to 4K.

Standing screen display size	28 Inches
Screen Resolution	3840x2160
Max Screen Resolution	3840 x 2160
Brand	ASUS
Series	PB287Q
Item model number	PB287Q
Item Weight	17.4 pounds
Product Dimensions	15 x 28 x 26 inches
Item Dimensions LxWxH	15 x 28 x 26 inches
Color	Black
Number of Processors	1
Computer Memory Type	DDR3 SDRAM
Voltage	240 Volts
Manufacturer	ASUS
ASIN	B00KJGY3TO
Is Discontinued By Manufacturer	No
Date First Available	June 10, 2014

ASUS PB287Q 28" 4K/ UHD 3840x2160 1ms DisplayPort HDMI Ergonomic Back-lit LED Monitor,Black

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