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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 87

post #861 of 3384
Quote:
Originally Posted by Mode77 View Post

Quote:
Originally Posted by Mr.N00bLaR View Post

Bump for reasonable memory voltage guidelines for 470/480
What card / model you talking about?

The RX 470 / RX 480 from AMD.
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post #862 of 3384
Quote:
Originally Posted by Mr.N00bLaR View Post

The RX 470 / RX 480 from AMD.

Well considering it's the memory controller voltage and not the actual memory I wouldn't do over 1150mv personally
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post #863 of 3384
Quote:
Originally Posted by Mr.N00bLaR View Post

Bump for reasonable memory voltage guidelines for 470/480

here
post #864 of 3384
Quote:
Originally Posted by Echoa View Post

Well considering it's the memory controller voltage and not the actual memory I wouldn't do over 1150mv personally
Is it the memory controller voltage? In wattman if I stay with stock frequencies and voltages for memory, I can undervolt all states to 800mv and run a complete heven. During benchmark the voltage in osd/gpuz/hwinfo is 980mv (memory voltage in wattman 1000mv). With a balanced undervolt between memory and core (state 7 990mv and memory 880mmv) the voltage shown in these programs is the core voltage (because it's higher than the memory one).
post #865 of 3384
Quote:
Originally Posted by mdki1996 View Post

Is it the memory controller voltage? In wattman if I stay with stock frequencies and voltages for memory, I can undervolt all states to 800mv and run a complete heven. During benchmark the voltage in osd/gpuz/hwinfo is 980mv (memory voltage in wattman 1000mv). With a balanced undervolt between memory and core (state 7 990mv and memory 880mmv) the voltage shown in these programs is the core voltage (because it's higher than the memory one).

Yes it's the memory controller, we don't have software access to memory voltage which is 1.5v range. The only thing you're adjusting with it is the IMC voltage and memory requires a hard mod of varying difficulty depending on your model
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post #866 of 3384
Quote:
Originally Posted by Echoa View Post

Yes it's the memory controller, we don't have software access to memory voltage which is 1.5v range. The only thing you're adjusting with it is the IMC voltage and memory requires a hard mod of varying difficulty depending on your model
Ok, thank you. In Polarios bios editor I see 2 voltages for memory (imc): 1 for 300mhz and 1 for 2000mhz. They are both 1000mv but, if you follow gpuz-hwinfo, this is not true. For example if I downvolt (with wattman) 2000mhz from default 1000mv to 865mv, in idle my voltages (always from gpuz and hwinfo) are: 800mv with core 300mhz and memory 300mhz; 869mv with core 300mhz and memory 2000mhz.
post #867 of 3384
Quote:
Originally Posted by gupsterg View Post

No idea as not owned one yet redface.gif , come on guys someone should be able to share info with someone who helped this community.
No worries smile.gif , bios fix will implement as if it was from factory as driver fix is doing for Windows/Linux wink.gif . As I had no reply from Lordkag I checked when he was last online 28/08/16 redface.gif . I will ask someone I know who has RX 480 with dual bios so he can check if UEFI/GOP made my Lordkag for me works as intended, he owes me some favors so should be quick to share info (I hope redface.gif ).

*** edit ***

My buddy with dual bios RX 480 has responded, will get ROM tested and report back smile.gif .

I'm really thankful for your efforts in creating a custom BIOS for me. Didn't expect that when I was coming to this forum. Just out of curiosity, why did you need a special modified UEFI/GOP bios for your RX480?

Secretly I'm hoping that enabling UEFI/GOP will also allow me to see the boot options and procedure through the eGPU. This is not possible yet without special modification to the EFI boot process itself (which is being worked on by Goalque over at the TechInferno forums).
post #868 of 3384
I'd like to know which settings in Polaris do I edit for the memory voltage? Can't seem to get 2250 stable. PowerColor Red Devil RX480

Any help is greatly appreciated!
post #869 of 3384
Quote:
Originally Posted by Nebulous View Post

I'd like to know which settings in Polaris do I edit for the memory voltage? Can't seem to get 2250 stable. PowerColor Red Devil RX480

Any help is greatly appreciated!

You can't you have to hard mod memory voltage. We do not have access to it. If you're willing to hard mod I can help you look into doing it for your card
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post #870 of 3384
Hello, i have red devil 470 4GB, 73.6 ASIC, on 1100mV stable 1270MHz, PL+15, GPU and VRM <70C@~2000RPM, but very hard going higher clocks, like 1175mV @1290+. It is like a normal for that ASIC? Should i tried mod BIOS for better timings\clocks (Hynix memory)? tnx for advice
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