This post will be edit a couple of times to today as I progress, I'm not the type to make 1 big post in one go with this sort of stuff 
Dat moment when you're package arrives much sooner
Finished the PCB, I lost my tweezers so apologies for the awfull soldering on the 8pin SMT chip.
First try it boots!
Now for some bad news
I can't load the GPU, it crashes the system.
My conclusion is that the 190W 12V AC/DC adapter isn't enough to power the GPU.
More testing will need to be done by me, but a quick try using the HDPLEX and a 350W AC/DC Adapter on another motherboard the Nano seems to work fine.
Okay I'm trying to narrow down what the cause is.
With the R9 Nano powered by the HDPlex and a 350W AC/DC adapter you would think it get enough juice.
Test system #1:
ASUS Q87T
4790K
16GB RAM
PCIe Riser
Running Heaven at 960x540 and 0xAA I get 5 fps
Running Furmark at 800x600 and 0xAA I get 76 fps
Running Furmark at 1024x768 and 0xAA monitors go dark instantly.
Now moving to Test system #2:
Gigabyte H81TN
4785T
8GB RAM
No Riser
Running Heaven at 960x540 and 0xAA I get 90 fps
Running Furmark at 800x600 and 0xAA I get 140 fps
Running Furmark at 1024x768 (7.8 MPixel) and 0xAA monitors go dark instantly. <--- Strange behaviour
Running Furmark at 1280x720 (9.2 MPixel) and 0xAA I get 119 fps
So the amount of pixels doesn't cause the monitors to go dark instantly lets try at the same vertical resolution 1366x768
Running Furmark at 1366x768 (10.5 MPixel) and 0xAA I get 111 fps
Screen didn't go dark instantly, but as I was typing this it still crashed at some point, Powerdraw at the wall was a mere 100W nothing substantial.
Running Furmark at 1920x1080 (20.7 MPixel) and 0xAA monitors go dark instantly.
This is really weird stuff
I can run Unigine Heaven 1080p 8xAA just fine and powerdraw at the wall peaks at around 200W so what gives.
Last edit for today, going out for Christmas eve.
Furmark crashes the PC at 720p 0xAA. I've got it running at 8xAA and it has been stable for 5 minutes. I feel like it depends on the load that is applied to the GPU. Maybe with 8xAA it has a more stable powerdraw compared to 0xAA but I'm just guessing now.
I should have asked for an oscilloscope for Christmas.
I'm open to any suggestions!
Okay one more
I swapped the Nano for a HD5870 for fun
R9 Nano
Running Furmark at 800x600 and 0xAA I get 140 fps
HD5870
Running Furmark at 800x600 and 0xAA I get 62 fps
Switched the powermeter to show peak power and it hit 262W. that might be part of the reason why it crashes. the R9 Nano does some extreme power management
http://www.tomshardware.com/reviews/amd-radeon-r9-nano,4285-9.html
They measure peaks up to a whopping 437W, the average is 186W but those peaks need to be handled.
