Bitcoin Forum

Hello,

I’ve invested in a rx480, and I also got a HD7970.
What I’m understanding is that you can’t crossfire these gpu’s,
But you can combine them with some multi GPU program?
Can’t figure this out

If you want to mine with them just connect them to a PCI express slots on the motherboard. You can use the 1x PCI express slots with the help of risers.
Example of how to do it: http://www.coinminingrigs.com/how-to-build-a-6-gpu-mining-rig/ (http://www.coinminingrigs.com/how-to-build-a-6-gpu-mining-rig/)

As far as program for combining your GPU's  (hash rate) is concerned, that will be done by mining software. Mining software will automatically recognize your GPU's (if everything is connected the right way). If not, you will need to tweak software a bit. Rest has been explained by MinedTangerine. If you have more questions just ask.

also that 7970 won't earn anything anymore

You will need two different drivers for both cards. I suggest installing RX 480 driver first, then install the driver for HD7970. After that, may your RX 480 will be troubled (yellow sign in Device Manager). But don't worry, just do a manual update on your RX 480 driver. And you ready to go.

GPU Miners didn't actually require any compatibility between the Video Cards you are using.
Unlike in Gaming that requires both GPUs to work together to do a single process (although some SLI/crossfires distribute the workload) .
In mining, your GPUs works separately and delivers separate results based on it's computational power to solve an algorithm.

The previous replies told you "how to", I explained to you why.

It is possible to combine them, however it's not recommended due to them being in different series. It would be more convenient to sell your 7970 and purchase a newer RX series. You probably have to install both drivers in order to function.

do I need a special miner?
I'm using now xmrstack, can I adjust the config for this?

Depending on the coin you want to mine, you will need adequate mining software. So yes, I would say that you need "special" mining program.


From what I have seen xmr-stacks should recognize your GPU's automatically. They should be marked as "device 0, device 1..." and so on. You can find some basic tutorials how to set up xmr-stacks on Youtube.

I did set up the right config, but now every time the miner starts my computer is crashing.
Any idea what cause this?

By using xmrstack you will be mining CPU coins that have now been destroyed by ASIC cryptonight mining.

I suggest you use Claymore's Ethereum miner instead and mine Ethereum. Check whattomine.com for the most profitable coin to mine with your GPU.

You just need to install the latest AMD Adrenaline driver. The same driver supports ALL GCN cards. I have a HD 7850 2GB card mining UBQ in a rig together with RX 570/580's mining ETH without any problems. If you have a modded Bios on a RX 470/480 or 570 you also need to run the pixel patcher to bypass the driver signature check after installing the driver or the card will have a code 43 error in Device Manager and it won't work. You also need to toggle to Compute mode from Graphics mode in AMD settings.

https://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Adrenalin-Edition-18.3.1-Release-Notes.aspx

https://www.monitortests.com/forum/Thread-AMD-ATI-Pixel-Clock-Patcher

https://support.amd.com/en-us/kb-articles/Pages/DH-024.aspx

OP, here this more simple suggestion:

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just add a little info about pixel clock using, if you just want to bypass bios signature without change another thing, rename atikmdag-patcher.exe to atikmdag-patcher-bios.exe, it will make bios signature only that patched.

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Are you being serious? in what world changing the name of the executable changes anything?
I presume this kind of functionality can be implemented in theory, but seriously WTF are you saying?

https://www.monitortests.com/forum/Thread-AMD-ATI-Pixel-Clock-Patcher?pid=2#pid2

Also using same principle rufus is working (https://github.com/pbatard/rufus/wiki/FAQ#How_comes_the_portable_and_regular_versions_are_binary_identical): The way it works is like this: if the file name contains the letter p, then the code will run in portable mode.

Have you tried it? I have been to do it many of times. Maybe you need to download it and tried it to your modded cards (If you have it). Or may you want to Google it, let me give you the subject "rename atikmdag-patcher.exe to atikmdag-patcher-bios.exe". Cheers up!  ;)

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Edit:
Oh damn, you don't need to google it. theodrim (https://bitcointalk.org/index.php?action=profile;u=1874566) helping you well:

Your whole system crash or just he mining software? If its just software, than you made a mistake in setting mining software. Or it could be software it self, in that case download some different version of it and try again.
If its whole system that crashes, than maybe your PSU is not strong enough. Which PSU you have?

What kind crashing you mean? Froze? Blank Screen? What is miner software you are using now? Which coins?
Have you tried to lower your cards setting?

Or may you need to increase Virtual Memory/Pagefile (if you haven't do it).

My first rig was assembled from all of the GPU which I could get due to the large deficit. So on this rig I have works 2's RX480, 2's RX580 and 2xHD7900. All of the GPU working without problems and install additional software. Profit HD 7900 very low but I don't unplug them because there is no free money to buy a more modern GPU.

Maybe overheating? You should give us some more information about your setup. What do you want to mine with the multiple GPU? And you cant crossfire 2 different GPU chips. It should be the same.

As long as your cards made a profit, even if just a bit profit, no reason to stop it, right?

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Yeah, make sense.
OP - may you need to check your card's temperature.

Sorry guys. Apparently this is really the case. This is weird but seems to be true.
Nice to know... Not that I really see the point of "modifying the bios signature check only", as I haven't seen any adverse effects of just applying the full patch

Never mind!  ;D

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Technically full patch wouldn't adverse effects for mining process, Pixel Clock and Refresh Rate patching, used to allow higher resolutions and refresh rates. While the mining process using computation mode, so high resolution, and refresh rate didn't affect much in the mining process

Atikmdag patcher used for modded bios cards, to bypass driver signature check by the system so that the system will recognize those card. Unverified driver signature may be causing BSOD.

Could be power draw as well, if the crashing persists. What kind of PSU are you using?

Thanks for the tip. Can confirm this works. After renaming the pixel patcher .exe to atikmdag-patcher-bios.exe, only the Bios patch option shows up in the window. Cool! :)

https://image.ibb.co/kf8qs7/Pixel_Patcher_Bios_Only2.png

Hello again, sorry from the late response, I was on vacation.

when I install the miner, the whole computer is freezing, and the only way to get it back on runnin  is to get the power off and restart. have tried this several times.
earlier in this topic someone gave the tip to install the HD7970 driver after you installed the rx480, going to try this and keep you up to date.

if this will not work I will replace my energy 620W into a 750W, maybe that will work

My pleasure.  ;)


How dare you, we are all here trying to help you, and you were on vacation. But it's okay, and you show us, sometimes miners need a vacation.  ;)

I think if you use different gpu for mining "it can", but as far as I know later will get some problems in the configuration. My suggestion you should be to use the same type of gpu, because that will make it easier in your rig settings.  :)

How dare you, we are all here trying to help you, and you were on vacation. But it's okay, and you show us, sometimes miners need a vacation.  ;)
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my sapphire wants to go to mexico ;)

I did find out that I need at least 900W, so let you know if it works

Okay cowboy, don't forget to give us an update on your last condition. And don't forget to lock your thread when all done.  :P

I got now 1000W.
when I setup the config my computer is still freezing.
Any suggestions?

you need a different riser to combine the two GPUs, if successful you install first for rx480, after that you install another GPU.
you need an AIO program to install a C ++ program that can not read.

Good luck