XFX RX 550 4GB Monero Mining with xmr-stak-amd

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I recently found the XFX RX 550 4GB model for sale for just $109 shipped via Amazon and couldn’t resist the price tag. I was reading people getting around 300 h/s with the cards and that works out to around 2.75 hashrate per dollar spent. Not bad at all, so I ordered two (and just ordered two more that will be here tomorrow) and started playing with xmr-stak-amd to see what I could get out of them. Needless to say, I am pleased. Disclaimer: Below I have linked to Amazon using my affiliate links. It helps fund my hobby and keeps my writing these kind of articles.

Note: At the bottom is a follow up with 6 RX 550s on SimpleMining OS.

A quick rundown of the mining rig:

Here are the settings I am using for xmr-stak-amd for 2 XFX RX 550 4GB. Note: See update at bottom of post for 4 card configuration.

/* 
 * Number of GPUs that you have in your system. Each GPU will get its own CPU thread.
 */
"gpu_thread_num" : 4,

/*
 * GPU configuration. You should play around with intensity and worksize as the fastest settings will vary.
 *      index    - GPU index number usually starts from 0
 *  intensity    - Number of parallel GPU threads (nothing to do with CPU threads)
 *   worksize    - Number of local GPU threads (nothing to do with CPU threads)
 * affine_to_cpu - This will affine the thread to a CPU. This can make a GPU miner play along nicer with a CPU miner.
 */
"gpu_threads_conf" : [ 
	{ "index" : 0, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : 0 },
	{ "index" : 0, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : 0 },
	{ "index" : 1, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : 1 },
	{ "index" : 1, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : 1 },
			
],

/*
 * Platform index. This will be 0 unless you have different OpenCL platform - eg. AMD and Intel.
 */
"platform_index" : 2,

To break it down a bit, I am starting 4 GPU threads and assigning 2 threads per card, each with an intensity of 512 and worksize of 8. One video card is set to processor core 1 and the other to processor core 2. The Pentium G4400 is a dual core processor with no hyperthreading.

Platform_index is on a case by case basis depending on your hardware, but 2 is what worked for the above configuration.

The results can be seen below:

Averaging 655 h/s over 15 minutes. That works out to exactly 3 h/s per dollar spent on the video cards at a very low power output.

I would be interested in hearing your thoughts on this. Keep in mind that this is all at stock speeds! I plan to switch to Linux once I reach 8 video cards and have 12 XFX RX 550 running for just under 4 kh/s at a cost of just $1,308 dollars. The cards should retain a decent resell value due to the ram.

Update:  Here is my current results with now 4 RX 550’s at stock speeds:

Combined, all 4 RX 550s are producing 333.75 h/s over 15 minute window. Not bad, for stock speeds.

/* 
 * Number of GPUs that you have in your system. Each GPU will get its own CPU thread.
 */
"gpu_thread_num" : 8,

/*
 * GPU configuration. You should play around with intensity and worksize as the fastest settings will vary.
 *      index    - GPU index number usually starts from 0
 *  intensity    - Number of parallel GPU threads (nothing to do with CPU threads)
 *   worksize    - Number of local GPU threads (nothing to do with CPU threads)
 * affine_to_cpu - This will affine the thread to a CPU. This can make a GPU miner play along nicer with a CPU miner.
 */
"gpu_threads_conf" : [ 
	{ "index" : 0, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : false },
	{ "index" : 1, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : false },
	{ "index" : 2, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : false },
	{ "index" : 3, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : false },
	{ "index" : 0, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : false },
	{ "index" : 1, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : false },
	{ "index" : 2, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : false },
	{ "index" : 3, "intensity" : 512, "worksize" : 8, "affine_to_cpu" : false },
],

/*
 * Platform index. This will be 0 unless you have different OpenCL platform - eg. AMD and Intel.
 */
"platform_index" : 1,

Follow Up: I have now reach 6 RX 550s and have made the move to SimpleMining OS so that I can eventually fill the entire Motherboard up with 12 of them. I am using sgminer-gm-5.5.5 with the following settings:

--no-submit-stale --kernel cryptonight -o stratum+tcp://x.227.x.134:3333 -u 46dpA9N1KDE9yERcSGASXPUyA4ga1GrPq5sDXqwwjQL2dAmf5kvgpNQUWdvyT1r55pfwfvuBn2h7YQPhZFYdWtjWUVUTobh -p x --rawintensity 504 -w 8 -g 2

I’ve found it the most stable. Results:


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B3l3tt3
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B3l3tt3

What about power consumption ? What are the numbers at the wall ? For me it is as important as hashrate numbers to decide if I need to give a go to them.

Thanks for sharing.

rtssmkn
Guest
rtssmkn

I, too, would like to know the total power consumption of your current configuration. Thanks for sharing.

Paul J Rinkenberg
Guest
Paul J Rinkenberg

rx 550s top out at 55 watts a card.

vegas
Guest
vegas

Excellent post! As XMR goes up, the rig looks more and more appealing esp with such a low card price, the entry point seems less risky. And upgrading to better cards as the price on those drop is a no brainer. This will be my next project.

Defyeler
Guest
Defyeler

I’m getting 440h/s on a single 2GB card. Bios modded, 2 threads. Stable, down volt to save on wattage. Max can get 530h/s but doubles power. Not worth it at that point.

https://steemit.com/rx-550/@defyeler/sapphire-pulse-radeon-rx-550-usd80-bucks-for-450h-s-on-cryptonote-bargain-for-the-beginner-on-alt-coins

dtthhoanglong
Guest
dtthhoanglong

can you share xmrstak config ?

CatOhCat
Guest
CatOhCat

Great guide. I notice your hashrate on simplemining OS is a tad lower than that on windows stock speed. Is it unstable to get higher hashrate on simplemining os?

mrxmrminer
Guest
mrxmrminer

Did you ever overclock or memstrap these cards? got a couple myself and have had decent results….just wondering if you’ve moved from stock settings.

bibirez
Guest
bibirez

I did a bios mod on my Sapphire RX 550 2Gb with the 1375 strap. I get 383 H/s with default GPU clock and 1950 memory

Thomas Caldwell
Member

How did you get past the openCL issue in Ubuntu? I have tried everything and cant get clinfo to show anything. I have MSI 4gb OC cards.. and 17.50 driver wont compile…

Ken
Guest
Ken

Nice guide! Was wondering if you over locked these in simple mining Os and if yes, which OC setting your recommend?

toufiq
Guest
toufiq

Can you recommend me a motherboard which holds many gpu’s just like you??? Please.

Szeak
Guest
Szeak

Thank you very much to share this configuration by playing with threads and intensity.
After a few tries my GIGABYTE Rx 550 2GB Gaming OC card with modded bios on 1300MHz GPU and 1880 Mhz Memory runs stable at 470h/s avarage.
THANK YOU.

hoanglong2711
Guest
hoanglong2711

Can you give me download link of modded bios and config of xmr stak amd. Thanks.

dak
Guest
dak

hey guys i just seen this i have a 6 gpu rx550 4gb pulse set up to mine bytecoin getting around 300 a day once more risers get here im putting another 4 on aiming for 500 a day running 10 cards under 700w currently drawing 320w with 6 cards i call it the hybrid haha

hoanglong2711
Guest
hoanglong2711

how much hash /s you get ?

Roger Fong
Member

I mine Electroneum with 3x RX550, stable 1KH/s total.

William
Guest
William

If you were to do this build again, would you change anything or update any components?

I am building a very similar rig and want to know your final thoughts. Thanks you

cisions
Member

Hi, how did you get the RX 550s to work with simplemining OS? no drivers are working for me?

stian
Guest
stian

Nice post! But have you tried AMD XMR Miner? https://www.amdxmrminer.com/downloads/

That gave me a boost of around 50 H/s for each RX580 card, and lowered wattage by about 4% at the same time..