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post #5121 of 11506
Quote:
Originally Posted by gupsterg View Post

Currently TDC ie xxx A .

That's assuming the Fury bios works like Hawaii and has it.

And my interest in potentially sacrificing a Fury for science just died. The voltage is cool and all but I can do that with a hard mod. I can't do anything with the power/current limits because of the way the IR3567B works. Also I'm pretty sure we will see voltage control soon enough.
post #5122 of 11506
Quote:
Originally Posted by buildzoid View Post

And my interest in potentially sacrificing a Fury for science just died. The voltage is cool and all but I can do that with a hard mod. I can't do anything with the power/current limits because of the way the IR3567B works. Also I'm pretty sure we will see voltage control soon enough.

Your sig speaks the truth. +rep
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post #5123 of 11506
Quote:
Originally Posted by buildzoid View Post

The voltage is cool and all but I can do that with a hard mod.

From what you described in PM regarding voltage drop.
Quote:
The problem doesn't seem to be maximum power limit but the lower power levels. If I could do something to the card to have fewer voltage levels. ATM the card has 0.89V idle and then a bunch of voltages that top out at 1.22V. It seems that under lesser 3D loads the card runs 3D core clock but drops the core voltage a couple 10s of mv and that causes a hard crash.

This is what per DPM level voltage does in Hawaii, if you fix it manually then it doesn't droop/ work as EVV, so your hard mod isn't working like you think IMO. You may recall that table I PM'd.



If I replace EVV per DPM with manual voltage it will use that VID.
Quote:
Originally Posted by buildzoid View Post

I can't do anything with the power/current limits because of the way the IR3567B works. Also I'm pretty sure we will see voltage control soon enough.

Power I can mod, TDP I think I have found, perhaps there is no TDC value and is linked to the other 2 values.

Anyhow the stuff I have marked so far is 99.9% accurate in my opinion.

I have asked someone who maybe able to tell, yet no answer.
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post #5124 of 11506
Quote:
Originally Posted by gupsterg View Post

From what you described in PM regarding voltage drop.
This is what per DPM level voltage does in Hawaii, if you fix it manually then it doesn't droop/ work as EVV, so your hard mod isn't working like you think IMO. You may recall that table I PM'd.



If I replace EVV per DPM with manual voltage it will use that VID.
Power I can mod, TDP I think I have found, perhaps there is no TDC value and is linked to the other 2 values.

Anyhow the stuff I have marked so far is 99.9% accurate in my opinion.

I have asked someone who maybe able to tell, yet no answer.

Right then I'm back in.

IMO first we should test TDP. So give me a BIOS with a lowered TDP limit say 200W but don't change voltages. It will take probably until some time next week for me to get some cards here the UK so until then I don't have a BIOS to give you.
post #5125 of 11506
No worries, as I said before waiting on one person to reply regarding TDC but I'm also in the process of asking a 2nd, only problem is the forum that person is more active on I'm waiting for activation to be able to ask.

In the meantime @Ized has kindly pointed me to source of some driver code he sent me so I'll be digging into that.

Thirdly I'm gonna manually sift through new atombios.h files which are on some repositories that AMD personnel are updating (just in case a mod thinks it's hacking it isn't, their freely viewable but not downloadable).

If I manually take new updated atombios.h (ie copy script manually) and mod into old atomdis it doesn't works as there are certain "things" the rest of the files used to make atomdis lack. As I'm no programmer I can't make sense of what I have to do to update it.

What I think is MPDL is a) due to info in reviews (checked about 2-3 against values I've marked) b) its right next to MAX ASIC Temp, same location as Hawaii.

What I think is TDP may well be TDC, I don't know as can't find a figure for it online to cross ref with.

Now why I think TDP is TDP as in the Stock Sapphire bios it matches what I think is MPDL. And in Hawaii ROMs TDP / MPDL are always the same and TDC is usually lower by a few percent.

Now I can't yet find a value that resembles TDC, in Hawaii you found TDP > TDC > MPDL > MAX ASIC Temp (grey boxed value)



Now look at the Fury section.



It could well be there is no TDC value and its linked. Now you see when I test effect of TDP / MPDL / TDC when modding a Hawaii ROM I rely on a) monitoring gpu frequency b) software readings for VIN , IIN , IOUT , POUT , PIN .

You're in a position to get real data via DMM, which is beyond my capabilities.

Now if your wondering why TDP isn't the same as MPDL in the unlocked Sapphire Fury ROM, I think they "gimped" the ROM and that's why reviewers see the same GPU frequency range when they use that ROM for testing. In Hawaii all 3 values needed to be upped to effect GPU frequency.

Even when voltage control comes out for Fiji it will be the same as Hawaii. ie software applies a global GPU voltage offset hitting all DPM state voltages.

With bios modding some people on Hawaii have lowered the idle voltage well below stock and ramped up highest state to what they require. Then some have also tested what they require for the in between states and set those as they require.

Now Fiji is EVV GEN 2 and so is Tonga (aka R9 285 / 380) I'll also look at those ROMs, looking at those PowerPlays will also get me some data / experience.
Edited by gupsterg - 11/6/15 at 2:01pm
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post #5126 of 11506
Finally got a day off work. I am getting a max Vcore of 1.344V from my volt mods using the 220ohm pot +7 ohm resistor from buildzoid's guide.



I can keep a 1192 Mhz core overclock with it and maintain my earlier 630Mhz HBM overclocks at 33C core temps. I am testing this under both Furmark and 3Dmark. The increased core voltage and core overclock dose not seem to mind the HBM at all. I still cant get past 630Mhz on the HBM as any higher results in artifacts.



I still have not tried mucking around with HBM voltage yet but maybe a little later.

What combo of resistors should I try to raise my core voltage to 1.4V+?
Edited by Otterfluff - 11/6/15 at 11:34pm
post #5127 of 11506
Quote:
Originally Posted by Otterfluff View Post

Finally got a day off work. I am getting a max Vcore of 1.344V from my volt mods using the 220ohm pot +7 ohm resistor from buildzoid's guide.
Warning: Spoiler! (Click to show)


I can keep a 1192 Mhz core overclock with it and maintain my earlier 630Mhz HBM overclocks at 33C core temps. I am testing this under both Furmark and 3Dmark. The increased core voltage and core overclock dose not seem to mind the HBM at all. I still cant get past 630Mhz on the HBM as any higher results in artifacts.



I still have not tried mucking around with HBM voltage yet but maybe a little later.

What combo of resistors should I try to raise my core voltage to 1.4V+?


Awesome! But stay off of FurMark, it's useless except for burning GPU's. tongue.gif

It would be cool to see some benches with some games at that clock. thumb.gif Can you get a higher core clock without messing with the HBM?
post #5128 of 11506
Quote:
Originally Posted by Otterfluff View Post

Finally got a day off work. I am getting a max Vcore of 1.344V from my volt mods using the 220ohm pot +7 ohm resistor from buildzoid's guide.



I can keep a 1192 Mhz core overclock with it and maintain my earlier 630Mhz HBM overclocks at 33C core temps. I am testing this under both Furmark and 3Dmark. The increased core voltage and core overclock dose not seem to mind the HBM at all. I still cant get past 630Mhz on the HBM as any higher results in artifacts.



I still have not tried mucking around with HBM voltage yet but maybe a little later.

What combo of resistors should I try to raise my core voltage to 1.4V+?

Damn man nice clocks.

I'll explain some of the theory behind the volt mod. The VSENS pin on the IR3567B has a 3.4 ohm resistance from it to GND and a 2.1ohm resistance from it to Vcore. So basically it's a voltage divider circuit. By changing the ratio of resistance of the pin to GND and the the pin to Vcore you can change voltage. If you lower the Vcore to pin resistance you get less voltage. If you lower GND to pin resistance you get more voltage. In theory a 3.4 ohm resistor going from the pin to GND should give you a maximum Vcore of double what the normal Vcore is. However for some reason this calculation doesn't seem to work.

For the resistor I would next try a 5ohm and if that still doesn't give you high enough voltage go for 3ohm. The main problem with the mod is that the reistance of the pin to GND is really really low and so to get large voltage changes you need to changes in resistance of a couple ohms.
Edited by buildzoid - 11/7/15 at 2:38am
post #5129 of 11506
I can only get up to 1.3342V on the HBm using 220ohm pot and 50 ohm resistor. But it did not have any effect on my HBM clocks. I can get to 633Mhz and it's crystal. Jump up one more time and it all goes to hell with white pixel artifacts and crashing. Cant complain about 26% over-clock on the memory I guess.

The core voltage sure likes to dip around alot. For some tests it's fine but for others it's all over the place. Different tests even give different ranges of voltage. Makes it very hard to tune the voltage for every test in 3Dmark when they all seem to pull something a little different.

I should probably try some games next I have witcher 3, ashes of singularity, Civ BE, Ark Survival. I do not have that many AAA games that are recent.
Quote:
Originally Posted by GorillaSceptre View Post

[/SPOILER]

Awesome! But stay off of FurMark, it's useless except for burning GPU's. tongue.gif

It would be cool to see some benches with some games at that clock. thumb.gif Can you get a higher core clock without messing with the HBM?

I do not think I can get a higher core clock than 1180-1190 but the HBM seems fairly independent of whatever the core clock is trying to do. I do not seem to get better core clocking with HBM at stock speeds or at 633Mhz. It seems to be set and forget for HBM so far.
post #5130 of 11506
Quote:
Originally Posted by Otterfluff View Post

I can only get up to 1.3342V on the HBm using 220ohm pot and 50 ohm resistor. But it did not have any effect on my HBM clocks. I can get to 633Mhz and it's crystal. Jump up one more time and it all goes to hell with white pixel artifacts and crashing. Cant complain about 26% over-clock on the memory I guess.

The core voltage sure likes to dip around alot. For some tests it's fine but for others it's all over the place. Different tests even give different ranges of voltage. Makes it very hard to tune the voltage for every test in 3Dmark when they all seem to pull something a little different.

I should probably try some games next I have witcher 3, ashes of singularity, Civ BE, Ark Survival. I do not have that many AAA games that are recent.
I do not think I can get a higher core clock than 1180-1190 but the HBM seems fairly independent of whatever the core clock is trying to do. I do not seem to get better core clocking with HBM at stock speeds or at 633Mhz. It seems to be set and forget for HBM so far.

Well you just confirmed my suspicion on HBM being completely temperature driven. I'll revise the resistor values in the guide depending on your experience. Just to check you get 1.3342V with the pot set to 0ohms right?

It might be possible to get higher HBM clocks with less HBM voltage if temps scale better than voltage. I'll do some testing on that soon and add it to the guide if it works.

Hopefully we will have a BIOS that fixes the core voltage dipping.
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