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Modded R9 390X BIOS for R9 290/290X (Updated 02/16/2016) - Page 66

post #651 of 1994
290X NO_MOD_MOD

My thinking why you'd be getting a) black screens b) limited OC on RAM

Firstly it's using default memory timings and straps from 390X bios. Those timings would be for HYNIX H5GC4H24AJR IC, not gonna be particularly compatible with Elpida RAM.

Secondly it's using lower idle voltage of a 390X 900mv vs 968mv 290X, I think when it's stated MODDED voltage table it's using stock 390X values as seen in HawaiiReader which are irrelevant any how.

Why don't you try:-

MEM MOD -- ELPIDA

[*] MEM MOD -- ELPIDA: Use this folder if your R9 290X card has ELPIDA memory modules.

- "290X_ELPIDA_MOD_V1.7" --> This BIOS contains MODDED memory timings for ELPIDA memory, a MODDED voltage table and MODDED idle voltages taken from an R9 390X BIOS.

- "290X_ELPIDA_STOCK_V1.7" --> This BIOS contains MODDED memory timings for ELPIDA memory, and the STOCK voltage table and idle voltages from a REFERENCE R9 290X BIOS.
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post #652 of 1994
Quote:
Originally Posted by gupsterg View Post

290X NO_MOD_MOD

My thinking why you'd be getting a) black screens b) limited OC on RAM

Firstly it's using default memory timings and straps from 390X bios. Those timings would be for HYNIX H5GC4H24AJR IC, not gonna be particularly compatible with Elpida RAM.

Secondly it's using lower idle voltage of a 390X 900mv vs 968mv 290X, I think when it's stated MODDED voltage table it's using stock 390X values as seen in HawaiiReader which are irrelevant any how.

Why don't you try:-

MEM MOD -- ELPIDA

[*] MEM MOD -- ELPIDA: Use this folder if your R9 290X card has ELPIDA memory modules.

- "290X_ELPIDA_MOD_V1.7" --> This BIOS contains MODDED memory timings for ELPIDA memory, a MODDED voltage table and MODDED idle voltages taken from an R9 390X BIOS.

- "290X_ELPIDA_STOCK_V1.7" --> This BIOS contains MODDED memory timings for ELPIDA memory, and the STOCK voltage table and idle voltages from a REFERENCE R9 290X BIOS.


Yeah man. I found something as well. I think NO MOD roms on the OP have stock 390X timings past 1500MHz.

Anyway, I am looking at modifying a 390X rom with the Tri-X 290X's. I am looking ionto this now. Can I modify a rom using just HEX editor for this?

Edit, was able to get a crack at modding the VRAM table. Wasn't able to solve the Black Screen though. And as soon as I modded another one with the VDDCI Voltage, I can no longer get a proper flashable file.

Save the file from Hex editor > fixed the Checksum by opening the file and saving it via Hawaii Bios Reader > output file =129KB.

Can't flash it coz of the ROM size. Urgh.

http://www.3dmark.com/compare/fs/6268303/fs/6283085

2nd one has the Tri-X Memory timings. Not sooo bad I say.
Edited by mus1mus - 10/22/15 at 1:04am
post #653 of 1994
Without more detail on what you did I can't say why your rom size has changed.

There are empty areas in the rom which can be deleted so extra data can be accommodated but then near the beginning of the rom is a section that needs editing thus it correctly points to the new beginning offsets of tables. The beginning of tables shifts as data is added or removed, without rom having correct referencing offset locations for tables rom will fail.
Edited by gupsterg - 10/22/15 at 5:46am
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post #654 of 1994
Quote:
Originally Posted by gupsterg View Post

Without more detail on what you did I can't say why your rom size has changed.

There are empty areas in the rom which can be deleted so extra data can be accommodated but then near the beginning of the rom is a section that needs editing thus it correctly points to the new beginning offsets of tables. The beginning of tables shifts as data is added or removed, without rom having correct referencing offset locations for tables rom will fail.

I just took the Elpida Mod and changed the Memory straps to default Tri-X OC. Completely deleting the previous Values. Also, I copied the rest of the values from the blanked area up top of the section to the next blanked portion at the bottom of the Memory config. (purely guess work) biggrin.gif

By blanked area I meant hex values that are zeroed and not less than 3 lines in Hex editor. Just though, they are there to clearly seperate them configs. smile.gif

But I will be looking at the details of this in the coming days.

Ohh, yeah. I think I did the same on the Voltage info. (though not soo sure)
post #655 of 1994
Are the straps the frequencies best suited to the GPU? eg if memory strap is 1650 that is the best frequency for the memory to operate at?
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post #656 of 1994
Yes, in a way.

In ROM last frequency of range is in there and the beginning of each strap is +1 of last one's end.

So range for straps 1625 & 1750 would be :-

- 1501-1625MHz (if 1500 is the lower one below)
- 1626-1750MHz

Now each range / strap has timings. These tend to be slower in stock rom as you go up a strap.

So when you near the end of strap your getting best gains for that strap's timings.

At the beginning of each range your getting least gains for the timings and you maybe better off using the last frequency of strap below.

ie 1625MHz may be better than 1630MHz
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post #657 of 1994
So if I start artifacting at 1660 it will be better to run at 1625?
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post #658 of 1994
Nope. That is not the purpose nor the idea of the straps giving you better performance below the defined value.

What he meant was that, the timings for 1625 or maybe 1624 is better as it at the end of the timing spectrum. 1626 is past that and is already handed over to the next set of timings that are looser (take a RAM for example. 2133 CL9 vs 2144 CL10 to maintain stability. You know 2133 will still be better)

With VRAM straps, it may actually happen that you will lose the artifacts by going from a very tight 1625 to a looser timed 1626. thumb.gif
post #659 of 1994
+REP for expanding on my info share thumb.gif .
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post #660 of 1994
Hello, I have a HIS r9 290x and I have acquired this HIS r9 390x bios, and would like to try to flash it to my card. Would someone be willing to help me modify it before flashing? Or can i attempt to just flash this. See bios attached.

Thanks! his390x.txt 121k .txt file
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