so thats weird both msi and sapphire use better vram on their 470 4gb models vs the 8gbs, kinda wish the 480s were like that my msi 480 4gb is crap but the 8gb is pretty great for gaming and can hit over 30Mh but not worth $100 more per card and less power efficient
Stock bios goes all the way to 2000+ and 25.4mhs I can't mod them due to the bug that you saw with Polaris editor. I accidentally flashed them with boys Hynix rom! The booted up but crashed once you fired the miner. Flashed the original rom back and all good. Comparing my 470 nitro Hynix 90%asic and my 470 nitro Elpida 69%asic Stock bios the Elpida goes well over 2000mhz and the Hynix crash every time with 2000mhz
I just need a way to modify my bios in order to see what's the real deal with them.
I'd like to put my hands on the new version with elpida memory, I assume they are at least as fast as the Hynix chips.
BTW I don't share my bios' because the detailed steps and all the settings were already discussed many times. Please take your time and do the bios mod yourself. It doesn't take more than a few minutes.
I just learned that I've been fooled by having the display on my Gigabyte and ASUS 470, that's why I had to raise the VDDCI up to 1050mV. Today I pulled the LCD and went back to 950mV and the ASUS is stable at [email protected] (and even lower). That must be also true for the GB, but I already sold it.
wow this might explan a lot I got a some new sapphire cards and withoute checking immedatley flashed them with my current modded bios, one card however would constanly die and crash the rig. I bet this card has the new Elphida memory so my Hyinx roms don't work
problem is now I flashed bot bios slots in an effort to figure out whats what with the card
wow this might explan a lot I got a some new sapphire cards and withoute checking immedatley flashed them with my current modded bios, one card however would constanly die and crash the rig. I bet this card has the new Elphida memory so my Hyinx roms don't work
problem is now I flashed bot bios slots in an effort to figure out whats what with the card
That's a bummer. What I found out after a dozen flashes to my new Elpida nitros is that in order for my original bios to work I mustn't open them with Polaris editor, because it doesn't read them correctly. And upon save it corrupts the file, instead I just saved the bios from my stock 470 Elpida nitro with gpuz and flashed it to them.
Anyone knows why the cards that are not plugged on the monitor don't increase their mh/s on the miner despite the fact that watttool shows 2000+ MHz OC ? 1750 MHz and 2000+ MHz I get the same 22.4 mh/s while on the plugged card I get 25.7 mh/s with the same settings.
@ico What memory type does GPU-Z show for your card? And could you upload your bios somewhere.
Just got 3x sapphire nitro+ 470s with Elpida memory and that's exactly what I get on Polaris editor. Can't find a rom anywhere for those.
these cards got 2 sets of mem timings and PBE cant open them properly so you either have to pray for a new version of polaris editor or just edit them through hex(plenty of guides how to do it) .
is there anyway to tell which cards have Elpida memory if you have already flashed the bios to something else ? funny thing is the card worked for a while with the Hyinx rom at a lower speed 1850 mem then on a reboot it stopped working again. maybe its just a shitty Hynix card ?
Has anyone a Sapphire 8GB Bios with modified Timings. Thank you
Each card have his bios adapted to his asic so you better make it yourself:
Use atiwinflash to exctract bios, open it with polaris bios editor & copy 1500 straps timings to 1625, 1750 & 2000. Check if default mem frequency is at 1750 to avoid boot problem. Flash your card with new bios & reboot.
You need to make this modified bios from the original of the card each time. Mean x different card, x different bios.
Or at least specify asic of your gpu's so someone with very similar asic can share.
Okay thank you for explanation. Only to understand it right. I copy the 1500 straps timings to each other timing. Set the both memory clock default to 1750 and try. I will do one bios each card.
I'm moving from 6 x msi r9 390s, have read the whole thread and would poeples view on which rx470 4/8gb card is best for eth mining? I see the sapphire and msi cards have opposing views.... I'm aiming for a stable 25mhs a card.
Comments
my msi 480 4gb is crap but the 8gb is pretty great for gaming and can hit over 30Mh but not worth $100 more per card and less power efficient
I can't mod them due to the bug that you saw with Polaris editor.
I accidentally flashed them with boys Hynix rom!
The booted up but crashed once you fired the miner.
Flashed the original rom back and all good.
Comparing my 470 nitro Hynix 90%asic and my 470 nitro Elpida 69%asic
Stock bios the Elpida goes well over 2000mhz and the Hynix crash every time with 2000mhz
I just need a way to modify my bios in order to see what's the real deal with them.
BTW I don't share my bios' because the detailed steps and all the settings were already discussed many times. Please take your time and do the bios mod yourself. It doesn't take more than a few minutes.
I just learned that I've been fooled by having the display on my Gigabyte and ASUS 470, that's why I had to raise the VDDCI up to 1050mV.
Today I pulled the LCD and went back to 950mV and the ASUS is stable at [email protected] (and even lower). That must be also true for the GB, but I already sold it.
problem is now I flashed bot bios slots in an effort to figure out whats what with the card
What I found out after a dozen flashes to my new Elpida nitros is that in order for my original bios to work I mustn't open them with Polaris editor, because it doesn't read them correctly.
And upon save it corrupts the file, instead I just saved the bios from my stock 470 Elpida nitro with gpuz and flashed it to them.
1750 MHz and 2000+ MHz I get the same 22.4 mh/s while on the plugged card I get 25.7 mh/s with the same settings.
What do you think works best for mining? Also 4 gb or 8?
funny thing is the card worked for a while with the Hyinx rom at a lower speed 1850 mem then on a reboot it stopped working again. maybe its just a shitty Hynix card ?
It is stable, for my three cards.
Sapphire Nitro 8GB
Use atiwinflash to exctract bios, open it with polaris bios editor & copy 1500 straps timings to 1625, 1750 & 2000. Check if default mem frequency is at 1750 to avoid boot problem. Flash your card with new bios & reboot.
You need to make this modified bios from the original of the card each time. Mean x different card, x different bios.
Or at least specify asic of your gpu's so someone with very similar asic can share.
Only to understand it right. I copy the 1500 straps timings to each other timing. Set the both memory clock default to 1750 and try.
I will do one bios each card.
Then you can try thoses settings on wattman: (156mhs & 720w wall on gold psu for 6 rx 470 - mix 4 & 8gb)
Core: 1000Mhz/818mV (the card where is plugged my screen or dongle need 825mV)
Mem: 1900Mhz/850mV
If a card show error on HW info, u need to add few voltage &/or reduce frequency.
You need to disable amd control pannel autoboot with ccleaner.
Don't tweak settings while mining.
After tweak settings, reboot rig.
Because if wattman is open while rig crash, he will reset settings! (& stock settings use +1100w, can be problematic if on a 1000w psu)
Some guys prefer to copy 1750 straps settings & oc mem over 2xxx Mhz & some are using WattTool, well, i'm not yet at this point.
Any advice would be greatly appreciated!
@boysie @zorvalth
My Bios mod, do this to your own card. You can also try 1625 strap, but for me 1750 is best.