Originally Posted by mynm
I don' t know what to do, this one is the SE 1560 version with hynx memory https://www.techpowerup.com/vgabios/...90-8192-181113
but it have the same buld date as mine, I will try to see diferences between the bioses with Vento041's SimpleBiosDiff.
This is the 1545 bios one for the SE and hynx: https://www.techpowerup.com/vgabios/...-8192-181113-2
,it only have some changes into powerplay, usCKSVOffsetandDisable is 26 in my bios and 0D in the SE one, and TDP and TDC related values are slightly higher in my bios.
I think is better to wait for the support response, to see if they have a better bios.
the diferences between the 1560 SE bios and mine are usCKSVOffsetandDisable to 0D, the clocks, some fans tables values and higher TDP and TDC related values. Also TV_VideoMode/DispOutInfo is different, but I have no idea for what it is used. Also seems to have more values added at the beginning of the bios, but the Vento041's tool don't see these differences.
I have no idea what usCKSVOffsetandDisable vales are doing.
Sapphire support suggest me to contact with the shop, so I am going to return the gpu and ask for a new one.
I have tested what is doing usCKSVOffsetandDisable, if it is increased is increasing some kind of minimun "AVFS voltage VID" (I don't if is AVFS or other thing).
My default value for it is 26, with it my voltage, if I set powerlimt to + 20% to get a constant clock of 1545, is between 1.18v and 1.212v and most of the time to 1.2v.
I have tested the 590 niro+ SE 1545mhz bios that have D for this value, and the min voltage is lowered to like 1.16v, so my gpu is not stable.
With it to 0 the minimun is 1.15v.
With it to 32 is between 1.2v and 1.212v, I see some droops to 1.16v, but most of the time is 1.212v.
If I set the powerlimt to +20% my gpu is not stable, with 0 seems to be stable. So to get a constant and stable 1545mhz it seems I need to increase usCKSVOffsetandDisable to see less voltage drop. I have to test if with it to 32 is enough.
I have no idea if this is only working with 590 gpus, that I see is needing the driver patch to mod the bios, or if it can work with 580 gpus, that have this value setted to 0, afaik.
I think that Vega haves aswell the usCKSVOffsetandDisable value, but I don't know what is the default value for it.
Other thing I see is that using wattman not auto voltage or OverdriveNTool to change the voltages, is not using a this range of voltages.
I see Vega haves usCKSVOffsetandDisable and a usAVFSOffset values, so maybe it is not a AVFS offset for the 590.
00 00 USHORT usCKSVOffsetandDisable; /* Bits 0~30: Voltage offset for CKS, Bit 31: Disable/enable for the GFXCLK level. */
00 00 USHORT usAVFSOffset; /* AVFS Voltage offset */ }
Could be intersting to test these values en Vega.