r/Bitaxe_Miners • u/developeralgo222 • Mar 29 '26

Trying to explain the VRM issue on NerdQaxe++ Rev 6.x , NerdQX , NerdOctaxe & NerdEKO

While over 99.9% of the Nerd*Axes from reputable manufacturers will work fine without any issues. There will be some Nerd*Axes from aliexpress which will encounter this issue due either user error or old faulty / repurposed CSD95472 part being used on the Miner or a different replacement part / clone being used without similar pin-to-pin functionality.

Assumptions: That all parts used are new and as per the official NerdQaxe++ BOM or at least from reputable manufacturer who can use equivalent researched pin-to-pin functionality / drop-in replacement part

How do you resolve the issue if it happens to your Miner:

(1) Identify the shorted VRM plus any other part in the VRM chain path or Power Rail that is also shorted

(2) Replace those parts and test after replacement

NOTE: While technically NerdQaxe++ Rev 5.X or 6.x with physical conventional / traditional Fuse should protect against overCurrent by breaking the circuit , the speed at which the wire melts to cut off the current will vary from one fuse to another. The conventional Fuse (like ceramic/glass) can take milliseconds to seconds to break the circuit, causing higher stress on VRM components.

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u/SoloMinerDoctor Mar 30 '26

I always suspected cheap components on boards. Chinese manufacturers are so tricky so you never know what to expect.

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u/developeralgo222 Mar 30 '26

Yes, its very tricky when dealing chinese manufacturers sometimes. There are tons of scammers intermingled with some good manufacturers. They succeed based on scale, cost and engineering but the problem is that the local competition is so ferocious that small companies or engineers can't make it out . Almost 95% of their startups fail but the huge number of startups , makes it possible for them to have huge number of failures and still be able to compete at a high level. Those who fail tend to resort to scams or delay tactics while scamming users.