Someone told me that the memctrl and gpu voltages are connected in a way, that the Vcore is not allowed to go below Vmemctrl. And I tried and it seems true... That is new for me, hope it helps some others too. You have to decrease both in order to do a proper undervoltage.
Looks like that is true, because when I set Vcore on 800mV and mem on 850mV , GPU-Z reports vcore of 850mV~ gonna test it now.
BTW something fucked up with the Radeon settings... I was mining on undervolted settings for 12Hrs straight. stable and beautiful 126Mh/s @ 120W per card. then I closed the miner to undervolt it little bit more and my pc BSOD'd as soon as I clicked on th radeon setting icon
Happens all the time. Seems like an issue with Radeon settings rather than overclock stability. Its even happened at stock for me.
@uray , do you have there stock settings (frequencies) but improved mem timings? would that improve performance w/o raising memory freq.? can I just edit my own bios with your timings? I understand the risks of modding bios, that's why I dont want to go higher than the basic settings
@uray , do you have there stock settings (frequencies) but improved mem timings? would that improve performance w/o raising memory freq.? can I just edit my own bios with your timings? I understand the risks of modding bios, that's why I dont want to go higher than the basic settings
you can just get your stock rom from GPU, open with polaris bios editor and copy 1750mhz timing into your 2000mhz timing and leave rest of the parameters
I shall not be held responsible for any explosion caused by your GPU after using this BIOS, use the file ended with 29MH
any lower settings? ie 2225mem?
One card letting the system down out of 6. however get the same on a 2 rig system(one letting me down)
use ...29MH-LowerPower.rom it use 2225
*note : all my bios settings are intended to run on linux (which current driver has bug for causing gpu to stuck at lowest clock) so my bios are forcing it, it doesn't have core/mem stepping, the lowest clock are same or almost same to the max clock
so what exact changes are you guys making ? I have some 4GB nitros, 8GB and 4GB 470 Msi OC cards are I would like to mod them with the Polaris bios editor, or do we have good biose out there for these cards ?
@Marvell9 You will need BIOSes specific to those cards, or to edit yourself. All of the 4GB 470s I've seen are using Hynix memory instead of the Samsung used on the 8GB 480. This means a different set of timings, performance quirks, OC capabilities, etc...
PCB shots from reviews show the MSI 8GB 470 using Micron memory, which makes it somewhat unique thus far (Sapphire 8GB 470 seem to use Samsung) I've pushed my 4GB ASUS 470 (Hynix) up to ~26 mh and the same timings should work on any Hynix-equipped 4GB 470. Just stability testing currently, will post an example once I'm sure it's solid.
@uray would you mind editing your post with the link so it lists the precise model and VRAM size for that BIOS?
@Marvell9 You will need BIOSes specific to those cards, or to edit yourself. All of the 4GB 470s I've seen are using Hynix memory instead of the Samsung used on the 8GB 480. This means a different set of timings, performance quirks, OC capabilities, etc...
PCB shots from reviews show the MSI 8GB 470 using Micron memory, which makes it somewhat unique thus far (Sapphire 8GB 470 seem to use Samsung) I've pushed my 4GB ASUS 470 (Hynix) up to ~26 mh and the same timings should work on any Hynix-equipped 4GB 470. Just stability testing currently, will post an example once I'm sure it's solid.
@uray would you mind editing your post with the link so it lists the precise model and VRAM size for that BIOS?
I have one Asus and a few XFX cards how do you check the ram type again in gpu Z
I've pushed my 4GB ASUS 470 (Hynix) up to ~26 mh and the same timings should work on any Hynix-equipped 4GB 470. Just stability testing currently, will post an example once I'm sure it's solid.
@uray would you mind editing your post with the link so it lists the precise model and VRAM size for that BIOS?
If you need a tester I'm willing to try it out when your ready. I have 5 Asus 470 O4G's and the 6th is pre-ordered from amazon. The asic quality from gpuz 79.80%, 81.50%, 88.70%, 90.30%, and 93.90%, I'm not sure if that matters for what your tweaking.
@uray That's perfect. I did not realize your filenames contained that detail, I just wanted to make sure people didn't confuse it with the 4GBs.
@Marvell9 Fascinating, what kind of stock & OC hashrates are you seeing off the Micron 4GB and 8GB? It's possible there are multiple variants of MSI 470 with diff memory (their early PCB shots used Hynix)
@uray That's perfect. I did not realize your filenames contained that detail, I just wanted to make sure people didn't confuse it with the 4GBs.
@Marvell9 Fascinating, what kind of stock & OC hashrates are you seeing off the Micron 4GB and 8GB? It's possible there are multiple variants of MSI 470 with diff memory (their early PCB shots used Hynix)
the 8GB cards i need to verify if they are micron hash at 23.5 mhs stock and 379 sia the 4GB units are 21 mhs cant get them higer
OC though wattman does nothing but make these cards unstable which is pretty much the story with all 470s which is why the 470s are in dire need of roms even more than 480s
That is not even the top of it, but somewhere close. I know, voltages are not fine tuned yet. I should be able to push it back down to around 80-85W (GPU-Z)
That is not even the top of it, but somewhere close. I know, voltages are not fine tuned yet. I should be able to push it back down to around 80-85W (GPU-Z)
I did not touch anything except memory timings
wow looks very nice, if the 4GB 470 sapphire can do 29 the 480 saphires should be closer to 35 when properly tuned I bet. Let us know when you have the voltages figured out. I have a few 470 sapphire ref and a few nitros as well all 4GB.
It might not be even worth it to buy 480s anymore unless they can get tuned up past 30 mhs
the only question left to ask, how stable is it. In the screenshots. they have not run passed 5 mins. Also the temp are steadily going up. The fans are not adjusted?
the only question left to ask, how stable is it. In the screenshots. they have not run passed 5 mins. Also the temp are steadily going up. The fans are not adjusted?
It has been stable for an hour and I shut it down for further adjustments. (No invalid shares) I could bring down wattage to around 81W in GPU-Z while maintaining that 28.7Mh/s.
But the sweetspot is around 28.2 Mh where it has been running stable through the whole night at 2025/1100 925/925mV. While GPU-Z showing around 75W.
I set target temp to 70C now, and it is easily maintained @1600rpm (quiet)
One more thing: before sleep I updated Claymore from 6.2 to 6.3 and it shows about 1% slower hashrate for all 4xx cards 28.2->28 mh
Comments
I shall not be held responsible for any explosion caused by your GPU after using this BIOS, use the file ended with 29MH
can I just edit my own bios with your timings?
I understand the risks of modding bios, that's why I dont want to go higher than the basic settings
One card letting the system down out of 6. however get the same on a 2 rig system(one letting me down)
*note : all my bios settings are intended to run on linux (which current driver has bug for causing gpu to stuck at lowest clock) so my bios are forcing it, it doesn't have core/mem stepping, the lowest clock are same or almost same to the max clock
Thx 4 the ROM !!
i have tested the
Sapphire-RX470-8G-113-1E3470U.S4X-ETHMining-29MH-LowerPower
-> 24 - 30 MHS / 225 Watt
My Card: SAPPHIRE NITRO RADEON RX 470 8G
i think this on is better:
27.6 mhs / 195 Watt Stabil
https://dl.dropboxusercontent.com/u/46174172/Screenshots/Test21.JPG
lg Martin
I also have some reference 470s
All of the 4GB 470s I've seen are using Hynix memory instead of the Samsung used on the 8GB 480.
This means a different set of timings, performance quirks, OC capabilities, etc...
PCB shots from reviews show the MSI 8GB 470 using Micron memory, which makes it somewhat unique thus far
(Sapphire 8GB 470 seem to use Samsung)
I've pushed my 4GB ASUS 470 (Hynix) up to ~26 mh and the same timings should work on any Hynix-equipped 4GB 470.
Just stability testing currently, will post an example once I'm sure it's solid.
@uray would you mind editing your post with the link so it lists the precise model and VRAM size for that BIOS?
ASUS and Powercolor 4GB are definitely Hynix. MSI 4GB seems to be as well, mine have not arrived yet to confirm.
will post some test results once I've had a chance to get them set-up and running.
Have tried 3 diferent versions. They all seems to suck.
Sapphire-RX470-8G-113-1E3470U.S4X-ETHMining-29MH-LowerPower.rom
for
Sapphire Radeon RX470 8GB Model 113-1E347U.S4X
what kind of precise model do you need?
@Marvell9 Fascinating, what kind of stock & OC hashrates are you seeing off the Micron 4GB and 8GB?
It's possible there are multiple variants of MSI 470 with diff memory (their early PCB shots used Hynix)
the 4GB units are 21 mhs cant get them higer
OC though wattman does nothing but make these cards unstable which is pretty much the story with all 470s which is why the 470s are in dire need of roms even more than 480s
Running at 26.5Mh consuming 70 watt (this time measured it with an Amp Clamp, so no direct reading from GPU-Z.
That is not even the top of it, but somewhere close.
I know, voltages are not fine tuned yet. I should be able to push it back down to around 80-85W (GPU-Z)
I did not touch anything except memory timings
It might not be even worth it to buy 480s anymore unless they can get tuned up past 30 mhs
I could bring down wattage to around 81W in GPU-Z while maintaining that 28.7Mh/s.
But the sweetspot is around 28.2 Mh where it has been running stable through the whole night at 2025/1100 925/925mV. While GPU-Z showing around 75W.
I set target temp to 70C now, and it is easily maintained @1600rpm (quiet)
One more thing: before sleep I updated Claymore from 6.2 to 6.3 and it shows about 1% slower hashrate for all 4xx cards
28.2->28 mh
update: