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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 281

post #2801 of 3318
Quote:
Originally Posted by generaleramon View Post

AMD is labellig that voltage wrong.
Radeon bios editor and also wattman change the vddci. As far as far know only asus strix cards can change the voltage of the memory modules.

I don't have a polaris gpu but I have tested to change memory mv with Radeon bios editor to a 470 bios and I think that what it's changin is mvdd not vddci, a according to this: https://github.com/torvalds/linux/blob/master/drivers/gpu/drm/amd/powerplay/hwmgr/pptable_v1_0.h

This is what I see with HxD Hex editor, changing 1000mv to 900mv:
Warning: Spoiler! (Click to show)

I don't know what mvdd is doing.

What it's changing wattman and watttool you can see here: http://www.overclock.net/t/1609782/watttool-a-simple-tool-that-combines-overclocking-with-vrm-monitoring-tweaking-for-rx-400-series that is:
Quote:
Memory clock and voltage: works similar to WattMan. The voltage is not the actual memory voltage (which is fixed to about 1.5 V or needs a hardmod). The voltage controllers second loop is not used, so it is questionable, whether the memory controller has an own dynamic voltage plane. My guess is that the voltage set here simply is a lower limit for the core voltage. If you overclock the memory, always check for memory errors (can be done with HWiNFO)

I know how to change it on a 380 bios like I said here: http://www.overclock.net/t/1621800/would-appreciate-help-in-finding-editing-the-voltage-offset-in-the-rx480-bios/50#post_26001261

Other thing that could be interesting to you to know, is how to include and vddc offset and more things on polaris gpus with the NCP81022 controller, is explained here: http://www.overclock.net/t/1621800/would-appreciate-help-in-finding-editing-the-voltage-offset-in-the-rx480-bios/70#post_26031519

Some 570 and 580 users have done it with success: http://www.overclock.net/t/1621800/would-appreciate-help-in-finding-editing-the-voltage-offset-in-the-rx480-bios/80#post_26046854
Edited by mynm - 5/4/17 at 5:51am
post #2802 of 3318
In finally Polaris bios editor change mvdd,or this is possible only with a hex mod?and mvdd is the same thing of vddci or is another voltage?winksmiley02.gif
Anyone have try to raise this voltage to maximum(1150v i think)?any difference in performance?
Edited by EMYHC - 5/4/17 at 7:38am
post #2803 of 3318
Quote:
Originally Posted by mynm View Post

I don't have a polaris gpu but I have tested to change memory mv with Radeon bios editor to a 470 bios and I think that what it's changin is mvdd not vddci, a according to this: https://github.com/torvalds/linux/blob/master/drivers/gpu/drm/amd/powerplay/hwmgr/pptable_v1_0.h

This is what I see with HxD Hex editor, changing 1000mv to 900mv:
Warning: Spoiler! (Click to show)

I don't know what mvdd is doing.

What it's changing wattman and watttool you can see here: http://www.overclock.net/t/1609782/watttool-a-simple-tool-that-combines-overclocking-with-vrm-monitoring-tweaking-for-rx-400-series that is:
I know how to change it on a 380 bios like I said here: http://www.overclock.net/t/1621800/would-appreciate-help-in-finding-editing-the-voltage-offset-in-the-rx480-bios/50#post_26001261

Other thing that could be interesting to you to know, is how to include and vddc offset and more things on polaris gpus with the NCP81022 controller, is explained here: http://www.overclock.net/t/1621800/would-appreciate-help-in-finding-editing-the-voltage-offset-in-the-rx480-bios/70#post_26031519

Some 570 and 580 users have done it with success: http://www.overclock.net/t/1621800/would-appreciate-help-in-finding-editing-the-voltage-offset-in-the-rx480-bios/80#post_26046854


Correct PolarisBiosEditor Edits MVDD in Powerplay table which does NOTHING for polaris cards. The value that wattman and wattool edit is VDDCI which does change the aux voltage (physically checked on cards). Im still not 100% certain how this value behaves though since certain values work and other dont.
post #2804 of 3318
@jstefanop I'm trying to complete my RX480 to RX580 mod... Right now I'm trying to change the default memory controller voltage (that value that WattMan shows), the chosen RX 580 bios uses 950 mV (3B6 Hexadecimal, B6 03 little endian) and the default RX 480 Nitro+ bios (my actual card) uses 1000 mV (3E8 Hexadecimal, E8 03 little endian).

I used used ATOMBIOSReader.exe and HxD and found that the memory controller voltage should be stored at offset 1D, from the start of the "PowerPlayInfo" table (start offset of the supposed voltage value - start offset of the "PowerPlayInfo" table), and also at the end (the last two bytes) of "VoltageObjectInfo/VRAM_GPIO_DetectionInfo" table. Is this correct?
post #2805 of 3318
Quote:
Originally Posted by jstefanop View Post

Correct PolarisBiosEditor Edits MVDD in Powerplay table which does NOTHING for polaris cards. The value that wattman and wattool edit is VDDCI which does change the aux voltage (physically checked on cards). Im still not 100% certain how this value behaves though since certain values work and other dont.

Ok, but do you see VDDCI changing at hwinfo?. In my 380 wattman isn't changing VDDCI, only the minimum VDDC VID when memory is at the highest clock, like BromoL says.
Edited by mynm - 5/4/17 at 11:22am
post #2806 of 3318
Generalamon,

Just wanted to say I tested the new v3.1, it's much more stable than v3.0, the same stability as v2.3! Only 2 of my 7 cards had to clock down to 2080 instead of running 2100. I'd say this is a good new default
post #2807 of 3318
Tried out the v3.1 timings as well. As usual, ever so slightly faster (like 0,1FPS more in Valley). As for stability, well... There's no practical use for it, but now it can do this.

Bandwidth at 2250MHz with your timings. Obviously I'm getting enough errors to cause artifacting, but hey, it's kind of cool, isn't it?
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post #2808 of 3318

while trying to find out the memory clock that my card can push. the picture is test with stock 2000mhz memory. faulty card?
post #2809 of 3318
Quote:
Originally Posted by risotto View Post


while trying to find out the memory clock that my card can push. the picture is test with stock 2000mhz memory. faulty card?

MemCL always find errors on that test, use HWiNFO EDC error counter and stress test your VRAM with benchmark and games (careful, you must use both, since they stress VRAM in different ways)
post #2810 of 3318
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