01-11-2025, 12:16 AM
> I wouldn't state this as several hashes perform better with a CPU over a GPU
This generally isn't true, even with EPYCs, it's extremely rare that any CPU would beat a 4090. It's only very uncommon hashes like a very high memory-tuned scrypt but generally on the latest beta, 4090s do well enough that CPUs struggle to keep up. I agree that they are very occasionally helpful but not for 99% of use-cases
> Also if hashrate is available why not take advantage and use it?
It can cause slowdowns with other, more powerful hardware. The CPU gives the GPU work, so often you can slow down your GPU if you also use your GPU. For example, my total hashrate in -m 0 -b with both CPU and GPU is 28.4GH/s but with just my GPU alone, it's 34.2GH/s, so not only is it consuming more power, it's also slowing everything down unnecessarily. The problem with iGPUs is both that because the workload distribution difference is so great, either the powerful card or the iGPU can get stuck waiting around and problems with autotune only double.
> Laptops ...
Idk where this came from but yes I agree
This generally isn't true, even with EPYCs, it's extremely rare that any CPU would beat a 4090. It's only very uncommon hashes like a very high memory-tuned scrypt but generally on the latest beta, 4090s do well enough that CPUs struggle to keep up. I agree that they are very occasionally helpful but not for 99% of use-cases
> Also if hashrate is available why not take advantage and use it?
It can cause slowdowns with other, more powerful hardware. The CPU gives the GPU work, so often you can slow down your GPU if you also use your GPU. For example, my total hashrate in -m 0 -b with both CPU and GPU is 28.4GH/s but with just my GPU alone, it's 34.2GH/s, so not only is it consuming more power, it's also slowing everything down unnecessarily. The problem with iGPUs is both that because the workload distribution difference is so great, either the powerful card or the iGPU can get stuck waiting around and problems with autotune only double.
> Laptops ...
Idk where this came from but yes I agree