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Author Topic: Tutorial: how to build a mining rig with 3-5 280x cards  (Read 1304 times)
TheSmo (OP)
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February 14, 2014, 11:53:01 PM
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Today most of my hardware arrived *happy*.

Thanks to all on this forum who helped with their experience and input.

I hope to get the rig running tomorrow and will make a detailed list of my learning.



Detailed list of components:
http://www.das-hilfe-portal.de/technik/mining-rig-5x-r9-280x-7970-amd-ati/
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TheSmo (OP)
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February 14, 2014, 11:54:01 PM
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February 15, 2014, 12:27:50 AM
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Have you undervolted the GPUs and if so, how many wattage reduction did you see? Also, since the H81 Pro motherboard already come with 2 supplementary Molex for PCI-E, why did you get powered risers?
TheSmo (OP)
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February 15, 2014, 12:38:41 AM
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I bought powered risers in case i need them.As the blog says, this is my first rig ever, so I am learning by doing.

About your first question: nothing is built together yet, will happen tomorrow.
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February 15, 2014, 12:43:09 AM
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I bought powered risers in case i need them.As the blog says, this is my first rig ever, so I am learning by doing.

About your first question: nothing is built together yet, will happen tomorrow.

I've heard of cheap powered risers catching fire when both the motherboard and riser have Molex plugged into them.
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February 15, 2014, 12:50:10 AM
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Thanks for the warning. What do you mean with Molex?
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February 15, 2014, 12:51:26 AM
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Thanks for the warning. What do you mean with Molex?

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February 16, 2014, 12:16:20 PM
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We (my son and me) made the first test, installed Win8 and it works fine so far.

I leanred how to switch on a mining rig without a power-switch... feels like short-circuiting a car Smiley.

Next step is a test in a plastic crate... later today.

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February 16, 2014, 04:11:32 PM
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sorry but i hear that r9 280x like your with undervolt use only 275w, i think that use something like 300 or more watt! i have the same r9 280x Tongue

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February 16, 2014, 04:42:03 PM
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So that you don't have to stick a fork into your rig every time you have to reset it or power it on, try out these front panel connector button replacements.

They have saved me a ton of effort!
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February 16, 2014, 05:55:57 PM
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So that you don't have to stick a fork into your rig every time you have to reset it or power it on, try out these front panel connector button replacements.

They have saved me a ton of effort!

Thanks for the hint, but I changed the BIOS, so when I switch on the PSU, it also starts the computer.

More to come.
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March 11, 2014, 10:26:33 PM
 #12

So, after a long time, here's the update:

4 out of 5 riser cables were broken.
Had to get replacement from different merchant.
Replaced one 280x DUAL with 280x TOXIC.
Added a second PSU.
Runs non-stop since a few days.

More:
http://www.das-hilfe-portal.de/technik/mining-rig-5x-r9-280x-7970-amd-ati/

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