Aurora-R6, installing a Corsair H60

I have an Aurora R6 that has an air cooled I7 7700 (non k) and it gets too hot while under load. I was thinking about installing an H60 AIO since it has space for a radiator but I wanted to know what others thought before I do it. I have read that the motherboard already has a back plate that will work but I cant confirm if that is true or not. If anyone has any suggestions or information that would help it would be greatly appreciated. My main concern is the size of the radiator and the tubes, the motherboard already having a back plate or not, and I am also wondering if the 450W PSU will be able to take the pump or not. Thank you for any info or tips.  

Edit: Ok so I installed the cooler with little to no problem. Temps have majorly improved and everything is going great. When installing though I needed to go out and purchase 6-32x 3/8 screws as the screws that come with the h60 can only hold the fan in place so I put the fan on the bottom and the radiator was held down with the screws I purchased on the top. The tubes do press on the psu but it isn’t an issue it is a very slight pressure and the tubes do not heat up at all. Overall it is a very easy process and the cooler fits in well enough. If anyone has any questions or is trying to do this themselves feel free to ask.

Edit 2: so the corsir h60 is almost a perfect fit in the r6 and my temps never go above 55 now. I have had no problem with the install and it was actually very simple. Just some things to keep in mind the tubes do press on the psu a tad bit but it is nothing noticeable and the tubes do not get hot nor does the block so that's all good. The best position I found was rad fan on the inside so takes all the hot air out of the case and tubes on the rad to the right towards the ram with the sails on the block also pointing towards the ram. If you plan to put the fan on the inside like I did you are gonna need to buy some short screws to hold the rad in place as the ones that come with it will not hold both. I forgot the exact size but if you look up the online service manual you can easily locate the size of the rad screws and then buy some at your local hardware store or online. Over all very worth it and I got almost a 20 degree drop in temps at full load and it wasn't hard at all. If anyone wants to do this but has questions feel free to ask and ill try to get to you as fast as I can.