Hi
I am pretty new to mining and all but I've really tried to search all over the web and tried figure this out on my own.
I have 2 x Sapphire RX 480 NITRO+ OC 4GB now at first I am just trying to modify the secondary gpu. And when all is successful I will do the same with my primary gpu.
I am running:
- Win 10 64 bit
- Crimson 16.11.5 drivers
- GPU SKU: 11260-02-20G
- Miner: Claymore's Dual Ethereum+Decred_Siacoin_Lbry_Pascal AMD+NVIDIA GPU Miner v9.5
So first of all this is the gpu were it says "4GB" on a sticker on that package, but it's removable, and behind that sticker it says 8GB, so from what I've red it got the same hardware as a 8GB and therefore it can be flashed to 8GB.
This is what I've done so far:
1. I backed up all bios roms.
2. Turned off the rig, and switched the vbios switch towards the hdmi ports.
3. Then I made a copy of my bios rom and changed the memory value from 4096 to 8192 I also changed the memory strap timings. I copied the value at 1625 and used that value at 1750, 1900 and 2000.
4. I then flashed it using atiflash.
5. After this I saw some performance gain when dual mining ETH+SIA with Claymores dual miner. Eth went from 24 Mh/s to 25 Mh/s and SIA was the same as before (680 Mh/s).
6. Now what I saw people recommended was undervolting the gpu, increase the memory clock and reduce the core clock. Now this is when I am getting problems.
7. My original settings was, core clock @ 1266 and memory clock @ 1750. I have only changed the memory clock and set it to 1810.
I've tried undervolting it (-6 at a time), tried increasing the memory clock and reduce core clock (1220 - 1250) but nothing seems to work longer then a few minutes (if I am lucky) then it will crash and give me bsod.
I saw someone with the same card suggesting to set -96 mV, 1220 core, 2100 memory my pc instant crashes if I do so.
I've also tried copying the timing straps from 1500 and set them at 1625, 1750, 1900 and 2000 and do the changes above and it still gives me the same problem.
Any idea why I can't touch the voltage or core clock without everything crashing?
Current GPU-Z stats while mining @ 25 Mh/s ETH & 680 Mh/s SIAhttps://i.gyazo.com/1a12b89b51d349a3a15fa1f00d3d9bf5.pnghttps://i.gyazo.com/cb01233e9d15a62e4b2f76e98e7c9026.png