I speed-read through this thread. I know next to nothing about DC-DC power supplies but I'm sure there're plenty of resources here to set me straight before I piece together a build. I am ecstatic about the possibilities of a high-airflow/high-cooling APU design. The reviews I've seen seem to indicate that one of the major barriers to OC APU performance is temperature: slap a decent cooler on it and prosper. However, that is antithetical to the HTPC/tiny build use case. I'm excited to see the two come together in this case.
The only thing that gives me anxiety (well, besides the power supply thing) is that adding the dGPU would negate my hard work OC'ing the iGPU... But I do like to crank game settings... decisions decisions.
Final thought: I hope this project pans out successfully soon, partially on its own merits but partially because I want to see what you come up with for a case that fits full-size GPUs
This was my problem too. I purchased one of these cases to replace an aging alienware alpha thats got an i7. Its peppy but the built in gpu is kinda lack luster and showing its age in games. With that being said I kinda was feeling the same way do I go Low Profile Discreet GPU or iGPU and honestly with the 2400G and its built in GPU is great. I Have it on my test bench while I wait for my M.2 drive to come in. But with my HDPLEX 160W adapter and the low power draw of my total build its doing well. If you do an M.2 build with the 2400G you should be able to run it off the adapter and no extra cabling. Ill be taking photos of my build to demonstrate this once i get that M.2. Im hoping to run all this RGB lighting and 4 80mm fans in the case along with a Bequiet low profile cooler to get max cooling efficiency and with PWM low ambient sound