hi,
am confused, i have a "Sapphire Radeon R9 390 NITRO Tri-X OC (UEFI / Backplate), 8 Go" it's the same for Nitro that i read above
(
Sapphire 390 Nitro 1100mV ROM:
https://www.dropbox.com/s/gw0lhozg4hskz2a/sapp390_1100.rom?dl=0
)
?
we are speaking about the same card ?
Topic: One way to undervolt R9 300 series cards by BIOS mod - page 2. (Read 27060 times)
How can i edit Gigabyte 390/390x voltages? since bios is locked?
Someone can help me?
Someone can help me?
You can use the HawaiiBiosReader Hawaii Bios Reader Tool for Bios development
https://github.com/OneB1t/HawaiiBiosReader
How can i edit Gigabyte 390/390x voltages? since bios is locked?
Someone can help me?
Someone can help me?
Any bios for sapphire 380 Nitro (elpida)?
You can use some kind of BIOS editor to do the mod yourself. There are many instructions on the internet.
Any bios for sapphire 380 Nitro (elpida)?
currently im running 2x saphire nitro R9 390 im undervolt to -15% and overclock to 1100mz no mod bios and running perfect at 31mhs
if i mod my bios what i get ?
if i mod my bios what i get ?
For my own mod, I run the R9 390 below 1000mV, but the Core/Memory is just 975/1000 MHz, so the hash rate is just 27.4 MH/s.
You might need to mod the memory strap timing.
I heard the Eliovp has modified the Sapphire Nitro cards in the past.
currently im running 2x saphire nitro R9 390 im undervolt to -15% and overclock to 1100mz no mod bios and running perfect at 31mhs
if i mod my bios what i get ?
if i mod my bios what i get ?
For my own mod, I run the R9 390 below 1000mV, but the Core/Memory is just 975/1000 MHz, so the hash rate is just 27.4 MH/s.
currently im running 2x saphire nitro R9 390 im undervolt to -15% and overclock to 1100mz no mod bios and running perfect at 31mhs
if i mod my bios what i get ?
if i mod my bios what i get ?
I have been following Bobben's first post but I dont understand this voltages on my Gigabyte 390 card...
Here is the screen
[Gigabyte 390 bios.jpg](https://postimg.org/image/brf8wjm89/)
Here is the screen
[Gigabyte 390 bios.jpg](https://postimg.org/image/brf8wjm89/)
Put Bobben's values into four "Voltage" tabs in "Limit Tables" section + into two "Voltage" tabs in "PowerPlay" section.
I have been following Bobben's first post but I dont understand this voltages on my Gigabyte 390 card...
Here is the screen
[Gigabyte 390 bios.jpg](https://postimg.org/image/brf8wjm89/)
Here is the screen
[Gigabyte 390 bios.jpg](https://postimg.org/image/brf8wjm89/)
What would be a good wattage drop can do on the cards without effecting has rate that much on sapphire r9 390 nitro card using core voltage (mV) on mis after burn??
Thank you for share bobben2!
I will try the 380x bios once I back home!
Again, Thank you very much!
I will try the 380x bios once I back home!
Again, Thank you very much!
Hi Bobben 2,
thx for your detailed post. Everything is fine for our R9 390 cards in common, but we really expected some troubles in stability with only several cards out of 100+.
You've already edited bios for 380X, could you, pls., share it with us?
Thank you in advance.
thx for your detailed post. Everything is fine for our R9 390 cards in common, but we really expected some troubles in stability with only several cards out of 100+.
You've already edited bios for 380X, could you, pls., share it with us?
Thank you in advance.
Hi ,
I added links to modded BIOS files in the O.P.
Cheers.
I've already got at least the same results: only 3 cards out of 100 don't want to work with a table mentioned in first post.
What can you advise me to do with those 3 cards?
What can you advise me to do with those 3 cards?
I get 26mhash eth and 500mhash sia (-dcri 40) at around 180watt per 390( gigabyte g1). ( modded bios)
Using claymore v 5.3
cool...so can u share ur mod ? Using claymore v 5.3
No, but it is not very dificult. Use the hawaiibios tool and try yourself.
I get 26mhash eth and 500mhash sia (-dcri 40) at around 180watt per 390( gigabyte g1). ( modded bios)
Using claymore v 5.3
So if you only mined ETH without sia it would only use 140watts ?Using claymore v 5.3
I think it was 160W. Don't remember. I flashed around 100 cards and only 2 have failed. Needed to reflash to default. I also have some xfx 390 cards, and get more errors with these. I think the G1 series has bether asic quality. I made 2 mods with almost the same settings.
The best I could get was this
27.1MH/s using 170watts running at 950/1500 using 0.938V
So about ~ 6.3W/MHS.
27.1MH/s using 170watts running at 950/1500 using 0.938V
So about ~ 6.3W/MHS.
with a bios mod?
can u share the mod?
Also try it on Dual?
Read the first post and try those instructions. I can't post my ROM because its only for my specific card. Use HawaiiBiosReader and edit the values manually and flash.
I get 26mhash eth and 500mhash sia (-dcri 40) at around 180watt per 390( gigabyte g1). ( modded bios)
Using claymore v 5.3
Using claymore v 5.3
So if you only mined ETH without sia it would only use 140watts ?
I get 26mhash eth and 500mhash sia (-dcri 40) at around 180watt per 390( gigabyte g1). ( modded bios)
Using claymore v 5.3
Using claymore v 5.3
cool...so can u share ur mod ?
I get 26mhash eth and 500mhash sia (-dcri 40) at around 180watt per 390( gigabyte g1). ( modded bios)
Using claymore v 5.3
Using claymore v 5.3
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