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Hawaii Bios Editing ( 290 / 290X / 295X2 / 390 / 390X ) - Page 152

post #1511 of 3689
Could someone please take a look at my 290x bios and mod it?? Its a horrible clocker so i need all the performance i can get.
Vapor-X290x-8gb-UEFI 97k .zip file

Thanks.
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post #1512 of 3689
Thread Starter 
@The Stilt

Thanks, + rep smile.gif , still can't see it on my PCB redface.gif or i2cdump.

If you right click images below, open in new tab, they are full res 5000 x 2368




@fat4l

Here you go amigo! see if you benefit from 390 MC timings smile.gif .

ARESIII_390MC.zip 202k .zip file

RAM strap timings are stock, so you'll have to do your own modding, rest of ROM is as you supplied.
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post #1513 of 3689
@OneB1t, @gupsterg, I'm back as I promised with good news wink.gif

1. I finally found the source of advanced power efficiency demonstrated by Stilt's MLU and mining BIOSes. Yes, it's the lowered frequency! The Stilt refused to disclose the details when I asked him, but I knew there's no other way...

So, how it works (my card is MBA reference):
-when the card power's up, the VRM controller reads the frequency value from the MTP, and it's initial frequency is set to 500kHz.
-then, in a couple of seconds the value changes - it seems the Video BIOS finishes loading and executing and it overrides the 500kHz value with 480kHz (any any stock BIOS) or 290kHz (mining/MLU).
-after that, the frequency can't be changed any further, it only slightly deviates under load (it seems to me because of the input +12V rail voltage drop under load, my PSU in the lab is weak, and I couldn't test with a tough one).

Please note that even at reboot, the VRM frequency is not overridden anymore, it's like a Write-Once register at first power-up!!! D*mn ATIWinflash, I tested the reference BIOS with 290kHz and couldn't understand why there's no difference to MLU while it must be... biggrin.gif

So, playing with the frequency (or maybe other VRM settings), don't forget to power-cycle the card after every BIOS change!!!

When I spoken about the losses in the VRM last time, I missed the inductor ferrite loss due to high current ripple at high frequency (it applies to very high-current VRMs and inductors and rarely else), and particular this loss seems to be reduced greatly with lower VRM frequency.

Thinking about lowering the VRM frequency as a way to save power, I can't say it's bad, maybe we get 2 side-effects:
a) higher voltage ripple on VDDC under load,
b) higher requirement to the bulk capacity (silver alu-polymer caps in line) to prevent VDDC drop under significant load-step (undershoot) or VDDC overvoltage at load-release (overshoot).
I'll try to make some estimations and maybe release them later...



2. I've observed to effect of VRM phase shut-down. When there's no driver loaded, the VRM uses all it's 5 phases, and inly in Windows, when the driver is loaded, I could see how the card moves from 5ph-mode to 1ph-mode.
It seems to me the Dynamic Phase Control (DPC) feature seems to be turned off in MTP (see p.41 of 3565 datasheet), while the card uses only Power Saving States (see p.40), with only 1ph or 5ph options available through the driver request, while the intermediate power states could be really useful with light load (up to 50-60A) like browsing, video playback, and even light 3D.

As for me, from the hardware point of view, the VRM is designed well, and it could use all the available functions. But the software side is awful - when the desktop is totally static, I see 1ph active, but you just move the mouse - all the 5ph begin to work... What the h*ll! There's no load to the GPU, but the power state has already changed!! And vice versa, when everything is silent, you wait...wait...wait, until the card switches to 1ph. It seems to me there's a common problem with floating clocks and the power state changes, and in fact AMD is not interested in any tuning/improvement because the largest part of default users doesn't need anything but FPS in games...


3. I've observed the ZeroCore power feature (or how is it called??), when you set the display turn off timer to 1 min for example, and after a minute the display goes off, the card turns off the VRMs, completely stops the fan and the green LED on card bottom side turns on, indicating the card is off now. This feature works both with MLU and stock, and it's really cool thumb.gif


4. Finally I would like to mention one more thing regarding the idle efficiency. When 290X card appeared in my desktop (Core i7-4790K), I noticed it switches the PCIe link from x1 Gen1 in idle to x16 Gen3 under load (clearly seen in GPU-Z).

I used Catalyst 14.12 and everything was fine until I moved to Catalyst 15.7. Since that time the lowest idle state became x16 (!!) Gen1. I opened a topic in AMD support but they didn't understand me and said "it's okay, nothing to worry about" smile.gif

I tried to reproduce the problem during lab experiments, but I couldn't see x1 Gen1 mode with any drivers (including 14.12).
I have a specific MB here, mini-itx ZOTAC with GF9300 chipset, and maybe it doesn't support switching to x1 Gen1...
So please, guys, try to check the PCIe link params with old (14.12 or earlier) and new drivers and report back smile.gif
It's very interesting, it's my fault or AMD S/W engineers had broken something in PCIe link management since 15.7... smile.gif

It's all for the moment, maybe I find something new and report it here again wink.gif
post #1514 of 3689
Quote:
Originally Posted by MihaStar View Post

The Stilt refused to disclose the details when I asked him, but I knew there's no other way...

Why are you lying?
Quote:
Originally Posted by The Stilt View Post

The lower fSW indeed improves the efficiency and the temperatures of the VRM wink.gif

It sounds like you think I owe you something. If I throw a bone to someone, I don´t care to know how it tastes like.
post #1515 of 3689
Thread Starter 
@MihaStar

+ rep and many thanks for returning and reporting back cheers.gif. May I ask would you be able to share the 3565 datasheet?
Quote:
Originally Posted by gupsterg View Post

You find this 22 00 A0 00 23 00 A0 00 not only in MLU wink.gif .

SO we must now solve IMO

register 22: A0h = 160 ?????? = ~290kHz
register 23: A0h = 160 ?????? = ~290kHz
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post #1516 of 3689
Quote:
Originally Posted by gupsterg View Post

@fat4l

Here you go amigo! see if you benefit from 390 MC timings smile.gif .

ARESIII_390MC.zip 202k .zip file

RAM strap timings are stock, so you'll have to do your own modding, rest of ROM is as you supplied.

Thanks ! smile.gif
So basically this improves "memory controller" right ? Nothing to do with ram timings right ?


edit://
I see...There no additional bios support for other types of mems right? and mem straps go up to 2125MHz.
While before I was using 01, as for second supported ram, now I will use 00, right ?
Edited by fat4l - 1/31/16 at 6:54am
post #1517 of 3689
problem is that frequency is probably nonlinear (based on ir3565b datasheet)

also hawaii cards are inefiicient as hell even on 2D load card is still clocking up and down
when you use dual monitor setup card stay in 3D memory clocks

crimson drivers can fix this by setting 300/150 global profile BUT it does not work when you use 2 programs at once...
Edited by OneB1t - 1/31/16 at 7:07am
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post #1518 of 3689
Thread Starter 
Quote:
Originally Posted by fat4l View Post

Thanks ! smile.gif

No worries.
Quote:
Originally Posted by fat4l View Post

So basically this improves "memory controller" right ?

We'll be using 390/X timings because The Stilt explained:-
Quote:
Originally Posted by The Stilt View Post

To get around the MEMCLK barrier in Grenada, AMD has latched some of the memory controller related timings (through bios). So for higher than 1375MHz use 390 memory block with corrected memory density and corrected timings.
Quote:
Originally Posted by fat4l View Post

Nothing to do with ram timings right ?

No, those are stock Hynix BFR, you need to mod as you like. Be great to see:-

a) what freq you reach with bios as supplied.

b) what freq you reach once you mod timings in straps.

I didn't gain any stability to reach a higher frequency (yet) but have gained slight consistent performance boost.

My FS comapre (1100/1525): Factory ROM Vs Tightened RAM timings Vs Tightened RAM timings + 390 MC timings
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post #1519 of 3689
here is ir3565b datasheet http://www.irf.com/product-info/datasheets/data/ir3565b.pdf
its not really as detailed as it can be but better than nothing

using memory block from 390 is interesting for me as my card have problems with memory controller errors on higher clocks if i use low vcore voltage
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post #1520 of 3689
Thread Starter 
Quote:
Originally Posted by OneB1t View Post

here is ir3565b datasheet http://www.irf.com/product-info/datasheets/data/ir3565b.pdf
its not really as detailed as it can be but better than nothing

I made mistake when reading Mihastar's post, I thought he had IR3567B datasheet with 3565 pages but what he wrote was:-
Quote:
see p.41 of 3565 datasheet
Quote:
Originally Posted by OneB1t View Post

using memory block from 390 is interesting for me as my card have problems with memory controller errors on higher clocks if i use low vcore voltage

IIRC you stated you have Hynix? if so I posted copy of AFR for Kizwan & fat4l rom have BFR.

BTW what card do you have? why can't I see up6266 in i2cdump or image of my PCB thinking.gif
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