This is needed to get full speed out of ArakAttack Poseidon USB-drivers.
You can download the latest version always from Amihtlon Support Site powerpci update details:

This update fixes a problem in internal dma memory handler where memory was not given free, an so internal functions would slow down alot on high use of dma buffers as in USB low level drivers like ArakAttack for Poseidon USB-Stack.

An update to latest version of powerpci is highly recomended!

Best regards, Harald Frank