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Hello my rig have 5 sapphire radeon nitro plus rx 480 oc 8gb gddr5
http://image.prntscr.com/image/80e4b7c7a18e471e8bb06f83dcd21a5b.png
i need a good flash bios  To then overclock and know which is the best overclock.
Thanx

Upload the rom that you save via ATIflash and I will take a look as soon as I can. (I should start a service doing this LOL)

this is my  bios http://ge.tt/49rV1Rj2

My best result for samsung was using the 1750 straps and i get about 30MH/s with Mem set to 2150

1750 Straps
https://www.dropbox.com/s/g341nrhk8dun0ly/rx4801750Straps.rom?dl=0 (https://www.dropbox.com/s/g341nrhk8dun0ly/rx4801750Straps.rom?dl=0)
1625 Straps
https://www.dropbox.com/s/dq3n2qz4t0dnecu/endermrn1625%20straps.rom?dl=0 (https://www.dropbox.com/s/dq3n2qz4t0dnecu/endermrn1625%20straps.rom?dl=0)

Note: I am not responsible if you overclock your gpu to far using my provided straps or for any other reason as flashing roms can be risky so I offer no implied or expressed warranty. Remember it is always best to slowly increase frequencies to find the optimal setting for your cards.

What is the cards full model number cause I think I am going to start a site containing all the roms that I mod.

https://www.techpowerup.com/gpudb/b3719/sapphire-nitro-rx-480-oc-8-gb
I'm almost sure that my card has 2304
cores then I install the 1750 Straps.
Do I have to install it to the cards one by one correct?

You have nice gpus but consider downvolting if your power source is expensive.

That is how I flash all my roms. I have a dedicated system for flashing modded roms that uses the 16.11.5 Bios as 16.9.2 randomly has issues with flashing roms.

Then I'm going to use the 1750 and I'm telling you, how's it going you have skype or gmail?
and how?

i try to use 1750 Straps. but this say error in the install

Just flash it using ATIflash, then set your memory speed to 1950 - 2100 find the highest you can go and still be stable.