Hi guys, I have recently joined the camp of the used cMP 5,1. It was my replacement for my beloved Mac Mini early 2009 that recently failed on me. As you can tell I can still live with a Mac Mini 2009, I am not a very demanding user. I use my computer mainly for daily web surfing, some office application, casual family photo processing on LR, quite a bit of youtubing and ebanking stuff nothing heavy. No gaming, nothing really very critical and heavy. The cMP comes with a RADEON 4870. It works OK but main concern is about the heat generated by the card and possible lack of power efficiency on the card. Base on some homework done in this forum, GPU technology seems to have advanced quite a bit, and it makes some "yesterday" technology more affordable and that's great for value-minded soul like me, i.e. cheap skate. I set out the following requirement for my next GPU "upgrade". Must Have 1. Tinkering once is OKAY but once done, it has to be "Just Work". Hence I want the boot screen and being able to do future macOS upgrade without too much fiddling like swapping card. 2. Ability to drive 4K@60Hz for at least ONE display operation in the future. I currently is running a 27" 1080 HD mon, find it a little lack in display real estate. Seriously looking at good 4K monitor 3. Budget of $50-100 range, sorry, I am a cheap skate. 4. Stability and quietness in operation is higher priority than sheer speed & feed. Don't want a card that would set the Mac Pro fans going crazy. Nice to have 1. Ability to drive a 4K TV alongside (@30Hz) with a 4K@60Hz monitor. I was told this is NOT something can be easily done with 1 single card (please correct me if I am wrong). 2. I read somewhere that it is great to do scaled mode 1440 in 4K display for text sharpness. I do quite a bit of reading on my computer, currently, having the 1920x1080 in 27" with the Samsung C27F391FHC, the text quality is a little bit to be desired comparing to my previous 24" Dell Ultrasharp. Candidates in mind 1. Radeon 7950 or R9 280 2. GTX 680 or GTX 570 Feel free to share what's the PC card that you use and self-flash with success in a short notes, I want to get a feel on which card is ideal to hunt for the self-flash operation. Currently, I am looking at this http://www.sapphiretech.com/productdetial.asp?Pid=D9A64D5D-60F4-41C4-BF78-8773BA2C3974&lang=eng a source is offering this at $60. It is some kind of dead stock coming out of Sapphire, like new condition. So much for now. I really love this community, there are load of very knowledgable people and willing to share the knowledge. Thanks and have fun! E --- Post Merged, Jun 5, 2017 --- The source could also provide this http://www.sapphiretech.com/productdetial.asp?Pid=9213647F-B1DB-4945-BE33-8E1353666B91&lang=eng for the same price. The concern is this card does not have the same port config as the reference card. There is no two mini DP in the reference card.