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Hawaii Bios Editing ( 290 / 290X / 295X2 / 390 / 390X ) - Page 131

post #1301 of 3871
Quote:
Originally Posted by gupsterg View Post

Yes you need to mod to 4GB, heading Supported memory size editing in OP.

I'd make Device ID info same as what you see in the ROM you supplied for VDDCI state mod, heading UEFI adding / removing plus Device ID editing info in OP.
I will do the mod & flash tonight. It's evening over here at the moment.
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post #1302 of 3871
Thread Starter 
No worries smile.gif , wet drizzly morning here rolleyes.gif .
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post #1303 of 3871
@gupsterg
That worked alot better.
I flashed it though DOS, now the only thing differing is the first checksum at table 00000020 column 2, which changes as soon as I save the file through biosreader. That one shouldn't be any problems.
The invalid values are completely gone and the memory straps and corrected DPM values remain. Awesome! biggrin.gif

Now I will just have to try it out for a bit to see that it doesn't blackscreen like the previous one did. That might just have been the straps though.
If I get blackscreen with this bios, do you think I'll see any improvements from straping the 1500 down to 1375? I'm not cool enough to make my own table for memory timings. tongue.gif

Thanks for the help!
post #1304 of 3871
Hi, is there any custom bios for 390x that i could flash whitout self editing?
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post #1305 of 3871
Thread Starter 
Quote:
Originally Posted by Slarre View Post

I flashed it though DOS, now the only thing differing is the first checksum at table 00000020 column 2, which changes as soon as I save the file through biosreader. That one shouldn't be any problems.

No that is not a problem smile.gif .

Quote:
Originally Posted by Slarre View Post

The invalid values are completely gone and the memory straps and corrected DPM values remain. Awesome! biggrin.gif

Good to read all sorted smile.gif .
Quote:
Originally Posted by Slarre View Post

Now I will just have to try it out for a bit to see that it doesn't blackscreen like the previous one did. That might just have been the straps though.
If I get blackscreen with this bios, do you think I'll see any improvements from straping the 1500 down to 1375? I'm not cool enough to make my own table for memory timings. tongue.gif

Thanks for the help!

You're welcome on help wink.gif , with stock factory ROM what RAM OC do you reach artifact free?

You may find Stilt's timings yield you best performance, but they are the tightest and you'll be limited on high RAM will clock with them. IIRC upto 1375 shouldn't be an issue with those. You'll find values in heading Memory Timings Modding > The Stilt Timings for Elpida BBBG .

I don't know which timings will be best you'll have to test, for example I have Hynix AFR. Stilts timings yield best results for straps 1250 & 1375. So any RAM frequency between 1126 - 1375 uses those. Highest frequency I can use Stilts AFR timings is ~1450MHz IIRC any higher I get major corruption on screen. Then I found stock 1250MHz copied to 1500 & 1625 would bench with performance gain over say stock timings or Stilt's.
Quote:
Originally Posted by huckincharlie View Post

Hi, is there any custom bios for 390x that i could flash whitout self editing?

Check linked thread.
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post #1306 of 3871
Quote:
Originally Posted by gupsterg View Post

You're welcome on help wink.gif , with stock factory ROM what RAM OC do you reach artifact free?

You may find Stilt's timings yield you best performance, but they are the tightest and you'll be limited on high RAM will clock with them. IIRC upto 1375 shouldn't be an issue with those. You'll find values in heading Memory Timings Modding > The Stilt Timings for Elpida BBBG .

I don't know which timings will be best you'll have to test, for example I have Hynix AFR. Stilts timings yield best results for straps 1250 & 1375. So any RAM frequency between 1126 - 1375 uses those. Highest frequency I can use Stilts AFR timings is ~1450MHz IIRC any higher I get major corruption on screen. Then I found stock 1250MHz copied to 1500 & 1625 would bench with performance gain over say stock timings or Stilt's.

I can run 1550 before I get "artifacts". It's more like screentearing-like thing that starts when I pump it up that high, even in 2D-applications. Don't think I'll be driving it that high though. I might be able to go higher if I do some voltage tuning, but with air cooling and me not daring to tweek memory voltage I don't know if I can gain much. Do you think aux voltage could help me get it stable for higher memory clocks?
1500 seems to be completely fine for me, and I will try going with the stock 1250 strap up there to check stability issues.
I will play around with stilts timings aswell to see how much I can gain using them. Should be a fun project. biggrin.gif

I'll hang around, lurking, in the thread though, as I find it quite interesting.
post #1307 of 3871
Thread Starter 
Aux voltage = VDDCI = Memory controller voltage .

This can help stabilize higher RAM clock but it really depends on your particular GPU, some members report gains by upping others don't. I haven't yet got any gain from upping it so YMMV. Do read relevant heading in OP regarding what is safe voltage to use for VDDCI.

Memory voltage = MVDDC .

Is not adjustable unless you have a) Asus Matrix or MSI Lightning b) a volt mod physically on card .

I did at one point think I found a table in bios that would adjust MVDDC, The Stilt confirmed has no effect. Even though The Stilt has highlighted that "normal" hawaii card lack extra voltage controller chip that Matrix / Lightning have, I still continue to search for MVDDC bios mod! LOL

I've also seen that cards which have MVDDC adjustment in MSI AB information page it will state found controller for it, I only get VDDC controller found on my card frown.gif .

You carry on lurking / posting, the more the merrier IMO thumb.gif .

You have already helped /contributed in updating OP at front thumb.gif , I will be adding info stating that bios corruption can occur if incorrect atiflash used and adding a bootable USB guide and files inc atiflash soon as time allows.
Edited by gupsterg - 1/24/16 at 8:34am
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post #1308 of 3871
@gupsterg

My first all by myself BIOS mod take longer time than I expected. I managed to get i2c dump before black screen crash because it seems offset voltage 55h is not enough for my card. Also I just found out that the original BIOS (which fyzzz shared) my modded BIOS based on also have offset voltage 55h. It seems @fyzzz increase that value to 65h.

150_850 NO_OFFSET ROM (left) vs. XFX390DD offset voltage 55h (right). Look at offset 0x26.


I think I figured out the offset voltage.

offset voltage 65h = 101 (DEC) = 0110 0101 (BIN)
0110 (BIN) = 6 (DEC) : 6 x 6.25mV = +37.5mV (VDDC)
0101 (BIN) = 5 (DEC) : 5 x 6.25mV = +31.25mV (VDDCI)

BTW, I just realized that I only put ELPIDA memory timings in 1250 memory straps & above. Is it also important to do the same with lower memory timings?
Edited by kizwan - 1/24/16 at 11:15am
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post #1309 of 3871
Been using that newer XFX 390 bios for 2 hours.
GPU / MEM: 1015 MHz / 1375 MHz.
0mV offset.
VDDCI: 150MHz = 0.850V / 1250MHz = 0.925V / 1375MHz = 1.000V.
DPM0 = 0.968V, other left default. DPM7 shows up as 1.218V for my ASIC.
Stilt's MLU Elpida timings.
1015_1375_968.zip 98k .zip file
Edited by DDSZ - 1/25/16 at 4:11am
post #1310 of 3871
I don't remember 100% what i did in that bios, but i can say for sure that i didn't mess with those values
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