Originally Posted by m42BMW
I am on water, so no fan issues for me. I am curious if anyone has tried editing the voltage table 2 without setting specific dpm voltages? Ie. Stock dpm7 table goes 1306, 1162, 1068.
My old R9 380 had a stock load VID of 1.115v, which is the average of 1162/1068 (med and low CAC from table2) my new card is 1.188v at load, which is the average of 1306/1162 (CAC high and med). I will test tonight, but I think rebuilding table with new numbers for the averages might be interesting? I was thinking of trying 1325, 1200, 1150 for a 1.238v vid.
I wonder if it's always using High or Low CAC (depending on load/application) and using the Medium to average off of? I just know punching in DPM7 as 1225 does not always equal 1.225v at load, perhaps using the table differently will allow for different (more consistent) results?
This idea stemmed from the 1.115 and 1.188 VID on my two cards. 1.115v and 1.188v are not found anywhere, and we know its using the table to get that VID. I think now maybe we know how it is determining that VID? High CAC or Low CAC voltage averaged with the Med CAC.
Acordig to @gupsterg http://www.overclock.net/t/1563409/software-for-r9-285-bios-edit/360#post_24991415
in fiji gpus changing CAS you can go up to 1.250V. But I have tested and it isn't working like this on tonga. I remenber doing test with CACs and getting a 1.25v max voltage peak voltage in hwinfo but I was reducing voltages, and I couldn't replicate the sema result againg.
Acording to @chris89
is like this http://www.overclock.net/t/1563409/lightbox/post/25524450/id/2873813
Acording to @Ansau
is like this http://www.overclock.net/t/1563409/lightbox/post/24804612/id/2686758
I'm going to test some chris89 bioses with some changes to see if them are stables, he have done a very hard work changing all the voltages and clocks in his bioses
, but in my tests I have low scores in firestrike with high voltages and high fans speeds with them.
If you want a lower voltage with the same clock but with the same power consumption and temps, you could try to change Load Line Slope in VoltegeObjetInfo Table: http://www.overclock.net/t/1563409/software-for-r9-285-bios-edit/820#post_25602565
, acording to my tests: http://www.overclock.net/t/1563409/software-for-r9-285-bios-edit/810#post_25600160
, it is reducing the variability of VDDC.
You can see there two values, the first acording to my tests is for VDDCI, the second is for VDDC.
I see here: http://www.overclock.net/t/1563409/software-for-r9-285-bios-edit/900#post_25645951
that VDDCI is more stable than VDDC, so I think that you only have to change the second value.
I think that LLS to 1 for VDDC is OK, and you have watercooling, so you could go to higher clocks with less voltage, with out temps problems. Don't use it in a OCed bios, I think is better testing it in a stock bios and see what voltage you need for stock clocks, because for a low voltage you could have a high power consumption.Edited:
I have tested this chris89's bios:
Mynm1160mhz1322mv225w168a14percentvoltage.zip 42k .zip file
Changing on it these values: 0 64 00 E4 12 98 08 D8 53 01 00 4C 19 00 00 02 78 00 E1 00 A8 00 E1 00 E1 00 4C 04 F0 0A E1 00 64, to this: 01 64 00 3A 2F 20 07 D8 53 01 00 37 19 00 00 02 96 00 E1 00 BC 00 E1 00 E1 00 4C 04 F0 0A E1 00 52. So with the advanced fan mode I get 81º with fans to 1840rpm:
Mynm1160mhz1322mv225w168a14percentvoltageWITHFAN1.zip 42k .zip file
Now gtaV is stable
, but it is a 1160mhz bios and I get 1040mhz in games with droops to 700 or 900mhz. This might be caused by the high voltages, so I'm going to test if lowering voltages with an offset I could get more than 1040mhz.
I have to test aswell to decrease TDP from 225w to 180w, like is doing chris89 for capping voltages. With this maybe I will don't have core clock drops to 700mhz. This is more or less what nano is doing. I will compare nano and fury bios to see differences in TDPs and fan profiles.Edited
the bios is stable with a -15mv~-18.75mv AB offset, I have 1040mhz more or less stables with drops to 1030mhz, and peaks to 1125.
With a -20% power limit the mhz peaks are more stables to 1080 1100, but it's in 1040mhz as well.Edited
With -15mv~-18.75mv trixx offset, -10PL and fans to 70% (to loud for my) it is not stable, and I see core clock drops to 1040 and 980.Edited:
Seems that Advanced fan mode is decreasing clock to the next lower DPM if the clock can't hold the max temp, so that it is going to 1040mhz. If I change DPM4 1040 to 1105 it is at 1105, but I see drops to lower clocks.
I'm going to test to set voltages and clock like EVV and AB are changing them. They have a max clock of 1030mhz, a max vddc of 1.225v, and a max vddci of 1.175. So voltage step are 6.25, and mhz steps are 5. VDDCI is not increased by the voltage offset, so will let it to no more than 1.175.
So I will increase voltages and clocks in these steps to see if them are stables and then use a voltage offset to see if I could lower them.Edited:
This is impossible, voltages ar going to high like this... I will set 1.225 for clocks higher than 1030 and the I will add an offset, and use AB clocks for the lower DPMs. Or better to use 1140 stable voltages for 1100.Edited
I have tested a bios with AB 1100 clocks and AB 1140 voltages a little bit adjusted and it seems to be stable in gtav with + half an hour test. And I have the same score and temps than with an 1140 AB OC. So I need +45mv to get the same clocks than with AB.
308A050011001250voltageslike1140225W188AFantype0.zip 42k .zip file
Warning: Spoiler! (Click to show)
I'm going to see if I could lower voltages.Edited:
seems to be stable with a 1.100 vddci instead of 1.175.Edited by mynm - 11/20/16 at 2:58pm