Originally Posted by BLUuuE
I've maxed out the power limit to 50% and the TDP in BIOS is at stock (120W), which means 180W.
In the above graph, I was running 1400MHz 1175mV. I was 95-100% load most of the time and the voltage would go to 1.14, 1.16, 1.13, 1.15, 1.13, etc... all within 1-2 seconds. Before, on my Strix 380 (IR 3567B), the voltage would be pretty constant and wouldn't jump around so much. Maybe it's something to do with the NCP81022.
I did some test about the voltages with a 580 nitro: https://www.overclock.net/forum/27779220-post956.html
, and it seems that even I was seen a 1.15v for the dpm7 I was getting up to 1.175v, and maybe more. It seems that maybe this is reated to the AVFS. So maybe that could be causing your problem.
If you are using afterburner or trixx voltage offset to increase the voltage, to solve it try to change wattman voltage comtrol from auto to manual.
If it is not working maybe you will have to do a bios mod to the asic prof table.
I can't test now my xfx 580 grs have a extrange offset of about +80 or 100mv, that is not seen into the VOI or into I2C dumps, and adding an offset to it needs a hard bios mod, so I am going to return the gpu. I have bought a 590 nitro+ black, with an offer is at near the same price of the xfx 580 gts or the gtr, so I think is a good offer, even if it haves the NCP 81022.
About the LLC, you can see in the datasheet https://media.digikey.com/pdf/Data%2...s/NCP81022.pdf
at page 39 are some values related to 0xE4 register, are not working for me.
But there is a way to do it to work changing some values into the VOI. On it you will see these values:
01 07 0C 00 0E
00 00 00 00 00 00 00 <--01 VDDC + 07 SVID2 voltage + usSize + usLoadLine_PSI
+ ucSVDGpioId +ucSVDGpioId + ulReserved
000E is usLoadLine_PSI 0E is in bits 000000000001110 and the names for the bites are:
// 14:7 PSI0_VID, // 6 PSI0_EN, // 5 PSI1, // 4:2 load line slope trim,
// 1:0 offset trim , so the ones for the LLS are bites 2 to 4 so
0 00000000 0 0 011
10 so if you see the table datasheet table for the LLC:
000−Remove all loadline drop from output
001−LL slope 12.9%
010−LL slope 25.8%
011−LL slope 38.7%
100− LL slope 51.6%
101− LL slope 64.8%
110 LL slope 77.4%
111 LL slope 90.3%
So 011 is 38.7% so for 010 the value to set is A, for 001 is 6 and for 000 is 2. I don't have tested this with the 580s but was working with the 380.
About the max limit for the voltage, it seem is not working with 0x24 Vout_Max register. I understand that to do it to work is to set one of the SVI2 table VID Codes, but seems to not be working.