Polaris 21 Based Sapphire Radeon RX 550 2GB with Elpida Memory – 490 h/s

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{ "index" : 0,
"intensity" : 432, "worksize" : 12,
"affine_to_cpu" : false, "strided_index" : true
},
{ "index" : 0,
"intensity" : 432, "worksize" : 12,
"affine_to_cpu" : false, "strided_index" : true
},

Hello again.

Here is the link to the modified BIOS (unlocked shaders) for Sapphire Radeon RX 550 2GB with Elpida memory.

https://nofile.io/f/MN7hy17qU81/sapphire_radeonrx550_2gb_elpida_shaders_unlocked.zip

gpuz_unlocked_rx550_2gb.jpg

My modest tests with stock GPU frequency and overclocked memory:

sapphire_rx550_2gb_elpida_xmr.png

Of course you can do your own experiments. I think that better results can be achieved by overclocking the frequency of the GPU, but with more power draw.. Enter your result in the comment!

Good luck.

Mariusz Zoolek, mariusz.zoolek(at)gmail.com

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heyall
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heyall

curious would this work on a gigabyte rx550? d5 2gb

what string did you change in the hex code if you dont mind me asking was it the ‘6F’ ?, just seeing if this can be applied to other makes cheers!!!!

cheers!

Marko
Guest
Marko

Hello.

I have that exact card, used your bios, unlocked additional shaders but didn’t gain any hashrate. Before my setup was:
flashed bios, memory oc 1875/950 and the card was doing 475 h/s.

Although your bios unlocked 128 more shaders there’s no performance gain. Why did you use worksize: 12?
My config amd-stak :
{ “index” : 0,
“intensity” : 432, “worksize” : 8,
“affine_to_cpu” : true, “strided_index” : true
},
{ “index” : 0,
“intensity” : 432, “worksize” : 82,
“affine_to_cpu” : true, “strided_index” : true
},

Are you also mining with cpu (is there any gain by not affining the gpu to cpu)?

Regards,

Marko

Mati Thian Yami
Member

Worksize 82?

Marko
Guest
Marko

Typing error. Used your settings, no gain of hashrate. Can you test it with the new version of xmrstak. You can manipulate memory chunk. Gave me an extra 20 hashes. Will try your bios again and the new version of xmrstak to see if i can go over 500h/s.

LoboMarunga
Guest
LoboMarunga

So you use the RX 550 with 640 shaders originally (Lexa chip) to unlock additional 128?

xmr user
Guest
xmr user

hi,
I have old version of Sapphire rx 550 2gb -Lexa with Elpida GDDR5 memmory.
I`m getting stuck on 550 H/s
stable oc @ core clock 1395 , mem clock 1940 (will go mhz-by-mhz).

Do you have a link for step-by-step bios mod?

my amd file looks like:

gpu_threads_conf” : [
// gpu: gfx804 memory:1664
// compute units: 8
{ “index” : 0,
“intensity” : 960, “worksize” : 8,
“affine_to_cpu” : false, “strided_index” : 1, “mem_chunk” : 2,
“comp_mode” : true

Any help is much appreciated !!!

Peter
Guest
Peter

Thx for your bios with 65282 mv setting on the core, now if have bricked my card.