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RX480 Nitro 4GB bios - small boost

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Hi,

After using Boysie's excellent low power reference bios, which gave a great boost to my reference rig, i thought i would have a try at creating a custom bios of the RX480 4gb nitro. The imporvements are only minor, im hoping someone with more experience can take it further

Before:21mhs
Modded: 25mhs

Total 6 card Rig (5 nitro 4gb, 1 nitro 8gb unmodded) : 885w at the wall
Total Rig Hash: 145-150mhs

I have no prior experience in modding bios, and the values i used were either

1. Copied from Boysie's bios
2. Copied current wattman settings
3. Or in the case of memory timing they were copied from one one band to another based on what ive read on these forums:

Copied 1625 to 2000
Coped 1500 to 1750
Copied 1425 to 1500 and 1625

Bios - i understand that the 840mV on the GPU means nothing while i have 850mV on the memory, sorry didnt get round to changing it



GPUs 0 to 4 are modded 4GB Nitros. GPU 5 is an unmodded 8GB Nitro



I tried to create a bios for the 8GB card too. I managed to hit 28mhs on that, but it was very eratic, often diving down to 15 mhs and back again. I noticed the the Memory Controller Load in GPZ was jumping all over the place. Anyone know the reason for this? Would be great if it maintained the 28mhs


Thanks again to Boysie for creating the low power bios

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