May I use the M2 Storage and the SSD disk simultaneously or I will have to unplug the M2 if I want to use the SSD ?.

As the iMac was built in with the M2 Flash Storage, do I have the original 3,5 bracket support available into the machine ?.This card was proposed at the set up like the M2 storage. So I wonder if I can also change the graphic card and add a NVIDIA GeForce GTX 780M with 4 Go of memory GDDR5. To do that, I have to open up the machine fully.

I know I have to buy a 2,5 to 3,5 bracket support to get the SSD fit in, also with a thermal sensor for the SSD, but at the end I still need the original 3,5 bracket support to fix it into the machine. My idea is to keep my OS on the 500Go (M2) and to use a part of the SSD to run BootCamp. The first hardware upgrade I want to do is to add a 2To SSD. Built with an i7, GeForce GTX 775M 2Go and also a flash storage of 500Go (M2). What I hope, is that you will manage to give me answers on those technicals aspects. All the upgrades I want to do are not advice by Apple, but first, I've some knowledge on that and second I will probably use a certified center to do those changes. The thing is that I have some technicals questions that are more or less still unanswered. I want to upgrade the hardware of my iMac 14,2.

27 late 2013 imac ssd upgrade