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ATI Hd 7950/7970 bios mod thread - Page 97

post #961 of 1286
Hello
I have one question:
Any way to mod bios from 7950 to r9 280 ?
post #962 of 1286
Quote:
Originally Posted by Nafu View Post

@Bkpizza

hey brother, i am also gonna need your help. i have no experience to modding AMD GPU BIOS. and i have sapphire 7950 DualX GPU.

i already touched 1250/1700mhz @1.381 voltage through Trixx in valley benchmark but my score comparing to my prevous MSI 7950 is pretty low. ASIC Qualit is 53%. i want to go 1300mhz on core. can you please guide to the bios modding. it would lot be appreciated brother.

What clocks were you running on the previous card? You may find that being at 1.381V means your card is hitting OCP and throttling. Does it stay at 1250mhz the whole run? I'm more than happy to make a bios, but is easier if I know as much as I can.

Quote:
Originally Posted by gastomlf View Post

Hello again , I Use the bios you gave me when I run OCCTPT4.4.1 my pc crashes, then use the bios of this page http://www.overclock.net/t/1281711/hd7950-revised-with-reference-hd7970-pcb-club SAPPER.zip 41k .zip file and with that I get to 1140 core to 1250V using TRIXX

That bios seems to suit you pretty well, I only try the 280 bios because its actually the most up to date version, but it may not work. Anyway if you now try to see how high your memory can go on that bios, we can make a bios for those clocks.
Quote:
Originally Posted by gastomlf View Post

I do not know much about this but I think the voltage curve in both bios is different, I imagine the 280 bios voltages are very low and those of SAPPER bios are higher

Not sure what you mean by voltage curve? I think it didnt run because the PCB's are too far different to each other. Also you should re install drivers if you flash bios to a different model.
I should've mentioned that earlier..sorry.
post #963 of 1286
Quote:
Originally Posted by long99x View Post

Hello
I have one question:
Any way to mod bios from 7950 to r9 280 ?

I don't know how to do this, but if you can find an r9 280 bios then you can flash your card to a 280, but not actually mod a bios from 7950 to 280.
post #964 of 1286
Quote:
Originally Posted by Bkpizza View Post

What clocks were you running on the previous card? You may find that being at 1.381V means your card is hitting OCP and throttling. Does it stay at 1250mhz the whole run? I'm more than happy to make a bios, but is easier if I know as much as I can.

on Previous Card. it scored 58FPS and 2400 score. @1220/1500mhz
on current card. it is producing 53FPS and 2227 score. @1250/1700mhz
(so thats a huge difference definitely, somewhere it is lacking performing)

I do notice that @1220 core its produces good noticeable difference in performance from 1200mhz. but beyond it the improvement ratio becomes less. the more i pump it up the lesser performance improvement become.

No it didn't stayed @1250mhz at all. while the whole run, i noticed it fluctuates from 1024mhz to 1250mhz, sometimes stays in between 1100 and 1180mhz. i think due to maximum voltage i.e 1.381v, card generates more HEAT which throttles a lot. which ultimately scores lower than expected. same as in other benchmarks this card always did scored low in all other benchmarks too, comparing to my previous 7950.

ASIC is 53% of this card.

Tahiti.zip 42k .zip file

http://www.overclock3d.net/reviews/gpu_displays/sapphire_hd7950_overclock_edition_review/1

But my default Clocks are 925/1250mhz, unlike in the review 900 on core


I am Using Corsair GS800w PSU
post #965 of 1286
Ok, so I have taken your bios and increased the power limit to 250w with the option of going to 300w at +20%.
It was stock at 167w so should hopefully help, also disabled boost and made clocks 1250/1700 at 1.381V.
This is a high voltage and if it doesnt throttle it will get hot, so be careful and make sure your vrm doesnt pop.
It's entirely up to you whether you use this bios.

Tahiti.zip 42k .zip file
post #966 of 1286
Quote:
Originally Posted by long99x View Post

Hello
I have one question:
Any way to mod bios from 7950 to r9 280 ?

Hiya, it may very well be possible. It all depends on what 7950 you are running as well as what R9 280 bios you try.

I am lucky and have two MSI 7970 Twin Frozr OC edition cards in my machine and managed to successfully load the newer MSI R9 280X Twin Frozr 4 bios onto both cards' secondary bios switch. I can then easily flick the dual bios switch between either stock 7970 or R9 280X bios (freshly installing drivers each time of course).
post #967 of 1286
Quote:
Originally Posted by Schnubab View Post

Hiya, it may very well be possible. It all depends on what 7950 you are running as well as what R9 280 bios you try.

I am lucky and have two MSI 7970 Twin Frozr OC edition cards in my machine and managed to successfully load the newer MSI R9 280X Twin Frozr 4 bios onto both cards' secondary bios switch. I can then easily flick the dual bios switch between either stock 7970 or R9 280X bios (freshly installing drivers each time of course).

You are 100% right, I can easily run an asus r9 280 and the 280x bios on my card, except that it only gives me 1.5v on the memory so I went back.
post #968 of 1286
Quote:
Originally Posted by Bkpizza View Post

You are 100% right, I can easily run an asus r9 280 and the 280x bios on my card, except that it only gives me 1.5v on the memory so I went back.

What settings do you run out of interest? And what cooling are you using if I may ask?

I have only ever used my cards on air cooling, so I ahve always been within very safe volts and clocks for temperature concerns.
post #969 of 1286
Quote:
Originally Posted by Bkpizza View Post

I don't know how to do this, but if you can find an r9 280 bios then you can flash your card to a 280, but not actually mod a bios from 7950 to 280.

Quote:
Originally Posted by Schnubab View Post

Hiya, it may very well be possible. It all depends on what 7950 you are running as well as what R9 280 bios you try.

I am lucky and have two MSI 7970 Twin Frozr OC edition cards in my machine and managed to successfully load the newer MSI R9 280X Twin Frozr 4 bios onto both cards' secondary bios switch. I can then easily flick the dual bios switch between either stock 7970 or R9 280X bios (freshly installing drivers each time of course).

I have 3 gigabyte 7950,2 of them are hynix ram and I flashed gigabyte r9 280 bios,it worked, but the left one is elpida ram and I can't find gigabyte r9 280 bios support elpida ram frown.gif

my bad English frown.gif
post #970 of 1286
Quote:
Originally Posted by Bkpizza View Post

Ok, so I have taken your bios and increased the power limit to 250w with the option of going to 300w at +20%.
It was stock at 167w so should hopefully help, also disabled boost and made clocks 1250/1700 at 1.381V.
This is a high voltage and if it doesnt throttle it will get hot, so be careful and make sure your vrm doesnt pop.
It's entirely up to you whether you use this bios.

Tahiti.zip 42k .zip file

hey Bkpizza, love you man,

i flash the modded bios into my card and that bios worked perfect for me. during benchmark i have noticed core clock 1250 mhz doesn't even fluctuate a bit. and hard stucked @1250. that is really impressive work from you............but @1250 benchmark wasn't stable or faced hell of artifacts on the screen how ever benchmark was successfully completed so i further modded it to 1240 on core which is smooth now.

now i want to know,

1. the power limit thing. previously it had 167w limit, what does it mean,. is it the real power drawing of gpu ???
2.secondly, in what perspective or ratio you change the power to 250w limit.? its just popup thing or you measure the wattage regarding to clocks??
3. why you didn't change the Target power limit, like it was 20% and in this thread in first post. the OP lean more towards changing or increasing target power limit to 50%.

don't mind i am asking too many questions or things. but i just want to clear my mind, and enhance my knowledge regarding this modding work.


once Again Thanx for your cooperation. it is highly Appreciated !!!!1
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