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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 177

post #1761 of 3317
I'm confused about the vddci/imc/aux voltage. Polaris says 1000, but hwinfo64 says vddci/aux 0.950 sometimes 0.975. Where would I change this and what would be optimal? I'm wondering if my chip might benefit from tweaking this. I don't care much about memory speeds, the uber strap works well for me at 2050, satisfied with that!
post #1762 of 3317
I found -100mV F0FF (-16) value.. but cannot find how to make -125 frown.gif
I think I should change something else than only this value by vddc (between:
8D 00 and FF 00 01 07 0C 00
frown.gif
ECFF doesn't wok as -20.. if I set -20 I get no wattage differency than with stock offset
post #1763 of 3317
@robnitro We thoroughly tested the VDDCI of Tonga over on the Tonga Thread. By stock was 1175mv, only on Tonga would there need to be an offset so as the core clock rose so did the offset to maintain it's static 1175mv value. Which is ideal.

If you wanted to change the VDDCI, it can benefit the biggest big end of clocks. For instance 24/7 stable 1563Mhz operation.

Though there is no VDDCI Offset location in ATOM BIOS Reader for Polaris for the 65288, 65287, 65286 and so on. You want to leave idle 300Mhz at 900Mv no less or more.

So if we can actually find the exact location of the 65288 Hex Offset in the BIOS, then we could alter the VDDCI Offset to core voltage.

This won't help when not pushing super high core clocks. Though if going for huge big end clocks like 2Ghz on Polaris. The VDDCI may need to be set to 1000mv Static, rather than 900mv.

The VDDCI is the Integrated memory controller voltage. The 1000mv beside the 2000Mhz memory clock in Polaris BIOS editor is the module voltage regulator voltage at the back of the card near the 6-pin. Usually 2 VRM side by side. Unless I'm Way Off, an AMD Engineer would have to explain hahaha

If someone can set me straight please find an AMD Whitepaper going over AMD GPU VDDCI and what VDDCI means exactly and where it's coming from. We know it's voltage for memory, but could be helpful to know the particulars.

HAHAHAHA

Tonga example is the same as Polaris. As the core voltage goes down it's VDDCI offset value increases. On polaris it uses very high Offset because of ultra low power consumption.

65288 : VDDCI : 1175mv : 1225mv : Offset is -50 or actually -51 in hex for CD FF
65287 : Etc

Polaris is like this...

65288 : VDDCI : 900mv : 1250mv : Offset is -350 or actually -351 in hex for FE A1 On progammer windows calc : so you have to flip it as it appears flipped in hex for value : A1 FE for 65288.
Edited by chris89 - 4/2/17 at 3:50pm
post #1764 of 3317
Confusing. So if it is 900, why is my aux on hwinfo64 saying 950?
I'm using stock bios for now... its 1.15v at the top 2 states 65288 65287.

If I set a voltage in the polaris editor instead of 65288 65287, would that make vddci higher or lower?
post #1765 of 3317
Sure thing man sorry for the confusion. I can be confusing for sure. Since the Actual answer has to be long and thorough. So I try it squeeze it all into a tiny-huge comment which doesn't do any good. haha

I'm glad you understand at least to ask if it would go higher. That's great. biggrin.gif

The answer to your AUX question is, AUX is not to do with the core or memory so to speak. It's the Auxiliary devices/ components on the board for such things like Video Decode etc. Specialty components for specialty tasks. No need to worry about aux.

As for the VDDCI, by altering anything as for instance 65288. You have nothing to worry about with Polaris as it auto-calculates the proper VDDCI offset so it remains static 900mv at all times. No matter how high your 65288 voltage etc.

The VDDCI however can be the reason why going too high on 65288 causes complete failure. Is when the offset becomes too great. That's when an increased VDDCI value would be in order. Though you should only want a higher VDDCI value/ offset for only 65288 and no others. Only 65288 would need the higher VDDCI for higher voltage & clocks. That way 65287 etc and below will remain 900mv VDDCI for low power consumption and heat.

I hope that answers and helps a bit haha. I'm sure now it's like "So, can we do something about it now?". Well the answer is sure yes we can, just need to proplerly know and find where 65288 offset location is in hex of your bios. All cards bios has a different offset location, though same brand cards will have the same location regardless of card model. Same would apply to all reference cards, the VDDCI offset location in hex would be in the same place for all Reference cards even if different manufacturer. The Dev ID should be the same across all reference rx 480's and the SubSys ID meaning manufacturer being AMD.
post #1766 of 3317
Quote:
Originally Posted by adamvx View Post

I found -100mV F0FF (-16) value.. but cannot find how to make -125 frown.gif
I think I should change something else than only this value by vddc (between:
8D 00 and FF 00 01 07 0C 00
frown.gif
ECFF doesn't wok as -20.. if I set -20 I get no wattage differency than with stock offset

What method are you using to find the offset locations in hex? I can help you.
post #1767 of 3317
it's good timing ? for rx 470 samsung memory


555000000000000022CC1C00AD615A41C0570E152DCB740A0068E7000B031420FA8900A003000000190F2F39B22D3517
post #1768 of 3317
Quote:
Originally Posted by hayame View Post

Rather curious about what settings you guys have in crimson for 3dmark, primarily the Texture Filtering Quality and Tessellation mode.

For Texture Filtering Quality I have it on performance and for Tessellation mode, I've tried both AMD optimized as well as Override with tessellation multiplier off/at zero.

That being said, I managed this:


while my max is
http://www.3dmark.com/3dm/18391702?

Currently I haven't tried to go past 1420 yet on this xfx 480 gtr but 1400/2250 is game stable with very little voltage increase (+25mv in trixx, max voltage it or gpu-z sees is 1.225 bu very rarely. Mostly stays under 1.22v)

That being said, I just finished editing bios to where it'll pull up to 225w if needed at 1.3v (if my calculations are even correct biggrin.gif ) but always had it on prior custom bios to only ever pull about 190w at most.

Can you share your bios. I'm interested to use it
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Silent Killer
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel Xeon X5650 Asus Rampage 2 Extreme Galax GTX 980 HOF Team Elite 
Hard DriveOptical DriveCoolingOS
WD Blue 1TB x 3 Asus DVD RW DeepCool Maelstrom 240T Windows 10 Pro 64 + Windows 7 Ultimate 64 
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Phillips 223V5 LED Monitor EBlue Media 2 Corsair AX1200i Corsair Carbide 400R 
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Bloody V8MA Razer Goliathus Pointer PM3128 
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post #1769 of 3317
I flashed several rx 470 with samsung without any problem, now I have found an elpida and hynix that when I open the bios the speed values ​​do not appear well and I appear as several vram schemes, to choose, what does this mean?


post #1770 of 3317
Is there any particular model of 470 4GB that is guaranteed to have Samsung memory and not Hynix/Elpida/Micron? I'm thinking of maybe picking some up for mining after the 570s get released if I can get a good price but want to be sure what I'm getting will have Samsung.
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