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Best BIOS ROM for Sapphire Nitro+ RX 470 8GB OC Samsung Memory 29-30 Mh/s

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In the last days i created 3 (or 4) mining rigs with Sapphire Nitro+ RX 470 8GB OC version (still 3 more to be build), i was able to get a max 30.1 Mh/s (something like that), but not that stable when plugged in all cards.

Looks like the Nitro+ RX 470 8GB OC is also good and stable same as the Nitro+ RX 470 4GB OC video card, the best spot for this cards was 29.4 Mh/s on Ethereum and 700 Mh/s on Decred.

As you know i prefer Claymore’s Dual Ethereum miner with -dcri 23/24, a 6x mining rig will get a total of 175 – 176 Mh/s.

This is the exact GPU used for this tutorial

Here are my results

And once again was almost impossible to hold the each card at 30 Mh/s speed, had to lower a bit for stability. In images you can see the best i could get on 3 rigs of Sapphire Nitro+ RX 470 8GB. OC

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Here is what you should do to get there!

Tools and software used

1 Preparing the RIG, GPUs and Windows

  • If you have a different Driver version than 16.9.1 or 16.9.2 use DDU to completely uninstall your current drivers and install 16.9.1
  • Make sure you reset clock settings to default
  • Shutdown the rig
  • Connect only one GPU
  • Power on the rig
2 Backup Original Bios

  • Extract atiflash to C:\atiflash
  • Run ATIWinflash.exe as administrator
  • Click Save button to backup the bios, save all bios in separated folders
  • Close atiflash
3 Flash Modded Bios ROM

New Version updated on February 21, 2018

Download BIOS

V1 1625 timings (1150/2100) https://mega.nz/#!gopzAZxb!ztRySC1NNXXR9ZNUAb_wRhmqoFmn4S4ZXoQKGlUIDx4

You can also try cloks like 1130/2150 , depends on each card

V2 1750 timings (1150/2150) https://mega.nz/#!t4pShKjA!mD8cqvyxDgIgvNQpsdr3zzDudfhoGlp2UbyStJ9Qg_U

I prefer this version, is more stable and the cards perform better with it, try both and decide which one to use πŸ™‚

  • Copy the BIOS to C:\atiflash folder
  • Run ATIWinflash.exe as administrator
  • Click Load Image and select the BIOS you just copied to atiflash root folder
  • Click Program button and wait for about 1 minute
  • Restart the rig when asking
  • Test with Claymore on Ethereum only using -benchmark 1, then test it with dual mining without -benchmark 1
  • Repeat the same process with all the GPUs

Before to continue further, please share this πŸ™‚ thanks!

Like i said, V2 seems to be the one to go with, i was able to set 95% of the GPUs having the same cloks with no problem!

GPU Clock: 1150
Memory Clock: 2150
-mV: -100
Power usage GPU-z: 91w
Power usage from wall: 125w

Some of the rigs done with this GPU

Let me know what are your results with this rom πŸ™‚

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