Great job man.
The biggest problem is the lacking backplate thickness... It's also painted and aluminum which cuts thermal conductivity significantly. I would use a nice heavy thick piece of pure beautiful copper. Drill out the screw holes, buy new screws and use 4.1W/m K thermal material and it can absorb hundreds of watts of thermal energy from the back side of the pcb.
If you cut this piece to size(local machine shop) it's a safe thickness for weight and how many watts it can absorb is within the thickness and mass. Copper in it's pure form has great thermal conductivity of way up there in the hundreds of hundreds of watts per meter kelkin.
Try MC21, and cut one in half with a big pair of tin snips for the one lone memory module regulator.
This should hold the core regulators and memory modules... make sure your gap will do well with 0.5mm pads since it gives very low thermal resistance.
I use a lower thermal conductive pad on the backside of my 380x pcb to cover the entire back which gives significant reduction in temperatures of everything on the pcb. If you have the cash and want 4x lower temps than the cheap option here's this massive thermal pad to be used for the backplate among many other things.
A little cheaper stuff, just 1.1 & 1.6W/ meter kelvin...
My dream was to achieve stable 24/7 1250mhz core, maybe you could push for the same as I can't do it. This card has hot power components so big clocks aren't possible unless every inch of the pcb is cooled appropriately, then anythings possible on amd. On nvidia the power components are better in control of achieving very stable high clocks.
If you can do 1250mhz, that's 40 giga pixel's per second... The gtx 970 has 56 ROP's and call it 950mhz core clock, that's 53.2 Giga Pixel's which is 53.2 billion pixel capability.
Run the r9 380 as 1250, that's only 13.2 billion shy which is not bad for a card which had been more obtainable plus I'm not much for 3.5GB limit... gtx 980 had the 64 ROP's.. 1000mhz x 64 ROP = 64 billion...
We might dial back on the memory volts and take it easy to see what it would take to get stable 200 Giga Bytes per second from the 256 bit gddr5...
Maybe we should take it easy on the one regulator...
1025mv or 1050mv or 1075mv or 1100mv... To see what is possible.. I'm willing to get you there brother.
Later bro Edited by chris89 - 10/9/16 at 7:53pm