The below bios has way too much voltage... 1400mv is voltage limiting at 1175mhz... we need less volts... I even went from 190w to 240w with no relief... anything above 1375mv gets hairy... maybe 1400mv barely just barely but way too high for 1175mhz.. 1175mhz might work at something like 1325mv to 1375mv... So I'm working on it.. we have to find max clock for 1375mv... basically
M42BMW_Chill_Bios_PowerColor_R9_380.zip 100k .zip file
Start with a STOCK bios, maybe change Powerplay power limit to 75% rather than 20% to yield max 225W. Then find your max stable clocks with TRIXX... +100mv on Trixx is 1.325v... +175mv on Trixx is 1.400v... I would probably do 1501MHZ memory which is 192GB/s which is enough for your one lone memory regulator. Then just focus on the core clocks and see if you can get 1250mhz totally stable around 1375 to 1425mv... Remember stock 65288 in DPM7 is 1225mv core... So remember what +XXXmv yields what voltage... So we can make you a permanent BIOS... Try 1563Mhz on STOCK bios by TRIXX... If it can't do it on stock volts it can't do any more with more voltage... So 1501Mhz shows 1500mhz in HWInfo and 192GB/s is good solid memory performance.
We will figure this out man.. For me I can't even get 1200mhz 24/7 stable... Something around 1150 to 1175 is doable though. I really wish 1250mhz was possible but the card puts up a huge fuss at anything above 1200mhz... TDP soars and temperatures soar... Not including the core... The core is cool because the manufacturers think only the core diode is important which is not the case... The voltage regulators get way way hotter than the core all the time so it's like pulling out your hair knowing this while under load... Then the thermal parameters shut down one regulator at a time off/on/off/on so we see stutters and dips because of it.
For instance my 380x has 15 core voltage regulators... Pushing 230 watts means they handle 15 watts each... Compare that to a 15 watt gpu without a heatsink or even with one and man that thing cooks at 15 watts...
These GPU's also are doing more stuff with electricity than the past, they convert high volts to high current internally channelling hundreds of Current Amperes. Amperes generate 10x the heat of low Ampere/ high voltage... They felt this was the best way to generate higher pseudo/virtual/fair land power but it's just a flop. I love AMD and won't give up on them, I just hope they get their engineering in-line because they only need to sort out thermals. The 390X should be extremely fast, yet it only edges some cards and isnt producing the FPS it is truly capable of.
Yep that's AMD for ya, never addressing the temperatures... They build amazing PCB's, capable of so much like the 290/290x/390/390x...
Yet with those 64 ROPs 512 Bit GDDR5 cards... They are just too hot to show their potential...
So Until we get the VRM temps and the entire PCB under control we will never get any sort of acceptable performance out of these cards...
On my sapphire I use the 17W fujipoly yet the VRM plate that is bonded to the alluminum heatsink is made of some sort of ultra cheap metal that has horrible thermal properties... So I still can't transfer enough of the heat unless the VRM contacts pure copper sharing with the core diode.
It's quite sad.
My theory to resolve AMD's thermal issues is if they coated the entire pcb with a highly conductive thermal epoxy, and cast a one-piece copper heatsink that is cast to contact the entire pcb... Same to the backside, full pcb expoxy to pure copper backplate (The epoxy would be applied, then heatsinks mounted then melt the epoxy and let cool so it's a perfect bond)... That way the cards would last forever and would only need to be air dusted and never ever worry about any of the temperatures. Then the performance would be allowed to soar in accordance to thermodynamics. Edited by chris89 - 10/10/16 at 6:30pm