Konman1 :
It is either the 7750 or 7770. Each time i checked, whether through 'dxdiag' or Device management it just tells me its the 7700 series. The 1060 or 1050ti would be compatible with my rig and 450 watt PSU?
Yes, GTX and AMD cards can be interchangeable between both AMD and Intel based systems and the power rating that comes on the box for the GPUs are what the manufacturer recommends for the entire system not just the GPU itself. So, you should be fine.
If you want to know roughly what your system will use power wise, you can put in all of your parts into the PcPartPicker.com system build. In the top right of that page it will give you the rough amount of maximum watts your system should ever draw (this does not include any type of overclocking).
I personally go for a PSU that is rated a couple hundred watts more than what I need, just in case I want to expand or overclock. However, keep in mind that if you system is close to the max output of the PSU, there is a chance that your system could become unstable. Just as if you push anything too far or really close to its max. Having a certain amount of wattage headroom acts as a buffer. Plus, if you only draw about 350 watts for example, having a 500 or 650 watt PSU will be able to handle that load easier and with less heat/noise (fans can ramp up like crazy if near max load) than a 350 or 450 watt PSU can. There will be those that disagree, but I don't like to take any type of chance on reliability.