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Best BIOS ROM for Sapphire Nitro+ RX 480 8GB OC to Mine Ethereum 30+ Mh/s

Hey, people. I just found the best BIOS for Sapphire Nitro+ OC RX 480 8GB. Tested it on 8 GPUs, all of them are working great with no problem so far.

This bios is from a Sapphire Nitro+ OC RX 480 8GB with Samsung memory, some say that all 8GB cards have Samsung memory only and 4 GB cards are based on Hynix or Elpida memory.

Here is the exact GPU i am using in this tutorial ( also on SALE 🙂 )

Amazon (best price)Price AlertAmazon EU best offers (on sale)

Sapphire Radeon NITRO+ Rx 480 8GB GDDR5 256 bit PCI Express 3.0 x16 Graphics Card (11260-01-20G), Althon Micro Inc.

Buy Now
Wait For A Price Drop

Price History


Current Price - September 26, 2023
Highest Price $331.19 January 21, 2020
Lowest Price $249.00 November 28, 2019
Since September 24, 2019

Last price changes

$301.38 January 27, 2020
$331.19 January 21, 2020
$249.00 November 28, 2019
$299.99 September 24, 2019

Before to use this ROM, make sure your GPU has Samsung memory by checking it with GPU-Z

First of all i will tell you the exact tools and software i am using, maybe this will make the difference..

To receive the latest updates follow me on social media! 🙂

Everyone should give a big thanks to Jukebox, from Ethereum forum.

On this thread here, Jukebox posted a BIOS ROM that he was testing, “Here is my another ROM with 1150/2150 clock settings, that does 29.8 MH, Use it on your own risk. “. He also stated that “If you VERY lucky, you can try to clock up to 1225/2300 MHz and reach 31.5-32 Mh with this ROM, but test it yourself. “, but i guess that would be too much and will also increase the power consumption.

My results with this BIOS ROM

Ethereum: 180 Mh/s (30.1xx per card)

Decred: 3050 Mh/s (511.3xx per card)

Here what you should do to achieve this awesome results

1 Download ATIflash and BIOS ROM file

2 Backup & Flash the BIOS ROM

IMPORTANT: Always start ATIflash as administrator.

  • First of all make a backup of the original BIOS (OC version) with ATIflash
  • Shutdown the rig
  • Switch VBIOS to the other side (side with HDMI cable)
  • Turn on the rig
  • Create a backup of “silent” ROM

Now that we have a backup of both BIOSES, let’s flash the v4.rom

  • Start ATIflash as administrator
  • Load v4.rom
  • Click “Program” and wait, the programming process will take max 1 minute
  • Restart the rig once you get the confirmation that the ROM was successfully programmed

If this ROM fails and does not work with your GPU click here!

I made a special video just for this, here it is

3 Claymore’s Dual Ethereum Miner

  • Download the latest version!O4YA2JgD!n2b4iSHQDruEsYUvTQP5_w
  • Create a text document and paste the following code inside
    EthDcrMiner64.exe –epool –ewal ETHEREUM_WALLET_KEY.RX480s –epsw x –dpool –dwal SUPRNOVA_USERNAME.WORKER_NAME –dpsw WORKER_PASS –tstop 85 –dcri 34
  • Save the file as .bat, like ETH+DCR.bat
  • Now run the .bat file

Before to continue further, please share this 🙂 thanks!

4 Sapphire Trixx – Overclock and Undervolt

  • Download the latest version
  • Install, start Sapphire Trixx and set the following values if not already added
  • GPU Clock: 1150
  • Memory Clock: 2150
  • Apply changes, and after that make this modification
  • mV: -100
  • Apply changes
  • Repeat this steps for each card
  • Check Claymore for results

Registry modification & Virtual Memory


I am using a file created by a user from Ethereum forum which let’s you to disable a lot of unuseful features for a mining rig like windows update, windows defender, OneDrive etc..

Before to run the modifier, please backup your registry first

As for virtual memory, claymore’s is asking for it, and this will improove your rig performance, at least for me it did

  • Go to “System” -> “Advanced system settings
  • On “Advanced” tab where its says “Performance” click on “Settings
  • Select “Advanced” tab again
  • Click “Change” button
  • Uncheck “Automatically manage paging file size for all drives
  • Check “Custom size
  • For “Initial size (MB)” i usually use the recommended one which in my case is “2938“, so i will add: 3000
  • For “Maximum size (MB)” add: 16000
  • Click “Set” button
  • that’s it

If you have less than 6 GPUs on your rig then, i gues, not reall sure 100% but you will have to use a different dcri, to find the best dcri value for your rig increase or decrease intensity by pressing “+” or ““, then press “S” to see current hashrate.

And finnally, the numbers, best moment of this tutorial 🙂


UPDATE: Wednesday, March 29, 2017

If for some reason this BIOS ROM does not work for your card as it happen with John here, like you get blue/black/green screens while starting to mine or booting to windows, low hashrate etc.. is maybe because of bad chips, you can use this ROM :!M14GXLgS!n03dhVJZeHkTyFff48dpUqFE8hK3Rj0Ek7D8dcB7vMY , it is a bit slower but will work for sure. Check this tutorial if you need help re-flashing your GPU: How to FIX & RE-Flash BIOS of Bricked GPU on RX 470 / 480 Series

Happy mining! 🙂

Disclaimer: This is not financial advise, I am not a financial advisor, this is for educational purposes only. If you want to invest in cryptocurrency please do your own research and invest at your own risk, 1stMiningRig is never liable for any decisions you make. 1stMiningRig may receive donations or sponsorships in association with certain content creation. 1stMiningRig may receive compensation when affiliate/referral links are used.
Thank you for reading. As always, your comments, suggestions and questions are welcome. Subscribe and stay tuned for further updates!

To receive the latest updates follow me on social media! 🙂



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