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Date: Tue, 9 Feb 2021 14:20:29 +0100
From: Solar Designer <>
Subject: Re: JtR ethereum-opencl


On Fri, Feb 05, 2021 at 01:27:31PM +0000, freeroute wrote:
> We tried to use --format=ethereum-opencl with several ETH hashes,  but it did not work.
> Note: GPU support installed.
> So we can use only --format=ethereum, but it's very slow.
> Are there any conditions for this to work?

ethereum-opencl only supports the older wallets that used PBKDF2.  It
does not support the newer ones that use scrypt.  Moreover, GPUs aren't
expected to provide good speeds at scrypt with those parameters even if
such support is added.  See:

and earlier messages in that thread.

So continuing to use the CPU format is your best option.


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