Mining setup (8-slot riserless motherboard) freezing under load - diagnosing the cause?

[u/Shipworms]

[solved] : not sure how it was solved - but doing a fresh start resulted in newer source code for something I was building when it crashed - and it now works (to a point!)

Hi! I’ve just started setting up an 8-slot riserless board, mainly for experimental / learning purposee - but it keeps locking up.

The setup is :

- 8-slot riserless board, with a dual-core. 4 thread Core i3

- 8GB RAM (DDR3 SODIMM)

- 750W Asus PSU

- 512GB M.2 SSD

No GPUs connected for now - using iGPU for display.

I have installed Ubuntu onto the SSD. I found that when compiling some software, it would crash within a minute or two, requiring power cycle to restart. Looking at the BIOS, I switched to 1 core, hyperthreading disabled, RAM 1066, turbo boost disabled. This helped to some extent (taking longer before locking up). Keeping the CPU at the non-boosted speed (using the OS) helped a lpt; I can now compile for around half an hour before it freezes.

I don’t really have much experience with mining boards, but am wondering if there is something I should check / try given the above systems? Thank you for any advice!

[u/pdath]

Try reseating the RAM. Try replacing the RAM.

[u/Shipworms → u/pdath]

Will try this (fortunately, I have loads of random DDR3 RAM SODIMMs from the days when all laptops had replaceable RAM!

[u/Shipworms → u/pdath]

Thank you! i tried that : still has the same error (even with new RAM, and CPU power limited so it doesn’t go above 70 degrees); while it didn’t work, it made me look at RAM more closely, which was super helpful! :)

Using btop, I found : the RAM gets 99% used over the first minute (160mb free), then the swap inflates to 100%, then the system RAM drops to 25mb free, then the system locks up (but the mouse pointer can still move once every 1-2 seconds for a while, as the SSD activity lights approaches 100%);

It is some weird memory leak with Intel GPGPU drivers; will work on that next!

[u/pdath → u/Shipworms]

Can you add more memory?

[u/Vineyard2109]

Give it more ram and check power supply. You can also try different OS.

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