Polaris card may also be tweak through the usage of wattman. When you discovered the sweat spot for the GPU and need it to be everlasting in bios then this information is for you. Polaris bios editor can not organize to undervolt neatly. We wish to hex enhancing the rom report to mend it.
Save your individual bios the usage of GPU-Z. Backup it.
Modifying FAN serve as
Use any Hex Editor to open your ROM symbol. (HxD Editor)
Seek 01 17 00 00 02
And three rolls beneath the “02”. This 01 manner “0 fan mode ON”. If you need the fan can forestall at sure temperature. Stay it at 01. And if you need the fan at all times spin, trade that to 00.
The byte subsequent to it’s the “fan forestall temperature”. For my PULSE, the default atmosphere is 2E, which imply 46C. e.g. if you need it to prevent beneath 50, then trade it to 32.
Final one, an important one for you. Is the apply byte, “fan get started temperature”. My PULSE default is 36 (identical to 54C). If you need the fan get started at 60C, trade it to 3C.
And if nonetheless doesn’t paintings. Then chances are you’ll disable Fuzzy fan mode. Exchange the byte between “max temp” (2A on this case), and “max PWM” (64 on this case) from 01 to 00 will trade the fan mode from Fuzzy mode to Legacy mode.
For the PULSE RX580 8GB card. I’m 100% the above mod can paintings. e.g. I flip OFF 0 Fan Mode. And now my RX580’s fan at all times spin, even already beneath the Fan Forestall Temperature 46C, the fan nonetheless spinning to lend a hand cooling.
End Fan Modifying…. Edit with Polaris editor to mend CRC and Flash…
Modifying Bios to Undervolt Rx580
Once we open up a RX580 ROM in Hex editor, seek 0C 01 03 06, and you’re going to see one thing like this
The C0 D4 01 proper after is the Max Vcore. To transform it again to the voltage
C0 D4 01 -> 0x1D4C0 (Hex) -> 120000 (Dec) -> 1200mV.
In my case, I wish to restrict the Vcore to 1000mV. So
1000mV -> 100000 (Dec) -> 0x186A0 (Hex) -> A0 86 01
At this level, we completed the first part, and wish to repair the second part. Another way, the ROM won’t paintings.
So, now we seek 8A 00 EB FF FF FF (which will have to be simply 16 row beneath)
The C0 12 proper after which might be the bytes that we wish to repair. So, what’s that imply?
C0 12 -> 0x12C0 (Hex) -> 4800 (Dec) -> 1200 mV (4800 / 4)
And because I wish to restrict the Vcore to 1000mV. Subsequently, I would like
1000mV -> 4000 (Dec, 1000 x 4) -> 0xFA0 (Hex) -> A0 0F
Sure, all we wish to do is solely mod those 5 bytes. Then this VBIOS now will restrict my GPU’s Vcore to not more than 1000mV. On the other hand, this guide hex edit will “void” the ROM. This time, we don’t wish to do any guide calculation (like what we did within the phase quantity patch). We will be able to merely open this modded ROM in PolarisBiosEditor 1.6.7 (in Home windows), the device will warn that the ROM is damaged, then we simply wish to save the ROM once more, PolarisBiosEditor 1.6.7 will repair the CRC robotically.
In fact, if you wish to mod the clock velocity, or observe reminiscence timing patch, and so on, you’ll additionally do it inside of PolarisBiosEditor 1.6.7 now. You will have to already know your goal atmosphere throughout discovered the min solid voltage.
N.B. Do NOT contact the voltage pointer. Depart it at default atmosphere. e.g. 65288 for degree 7 clock velocity. I by no means check this mod with every other voltage pointer.
And now, after you save this newly modded VBIOS, you in spite of everything have ROM that can let the GPU run on the clock velocity and voltage you need.
Please use polaris editor to edit the rom report as soon as to mend crc and proceed to flash it.
Only for backup in my website online. Ascertain to be operating to undervolt the RX580 reason Polaris editor fail to take action. When the voltage is fastened chances are you’ll edit the core mhz within the polaris editor as neatly. So that you little need wattman to tweak the GPU.
(Credit score to h9826790) MacForum
Observation: When you don’t perceive this information. Don’t trouble it and skip it. You might finally end up brick the GPU.
