The new algorithm that RVN will be adopting is called KAWPOW and is a derivative of ProgPOW with parameters specific for Ravencoin. The fork is planned for sometime in April, but a specific block time and expected date is not yet chosen. Meanwhile you are welcome to test the new dedicated miner called kawpowminer software that currently only supports mining the new algorithm and you can test it on the RavenCoin testnet using the MinerMore mining pool to make sure you are ready for the fork.
RavenCoin KAWPOW testnet pool:
kawpowminer -U -P stratum+tcp://WALLET.email@example.com:4505
The miner is currently available for both Windows and Linux operating systems, though apparently there is not yet official OpenCL binary for Windows, only CUDA. Since the binary releases do not include the required Nvidia CUDA 10.2 libraries you would also need to have the latest Nvidia CUDA Toolkit installed (or at least the runtime libraries from it). Other popular mining software would most likely add the required support for the new algorithm soon before or after the fork to the new algorithm occurs.
We remind you that unlike with Ethash, PROGPOW does not favor lower-end AMD GPUs as it is not so much memory dependent, thus a lower-end AMD GPU will perform similarly to the same level of Nvidia GPU and a higher-end AMD GPU like a similar class Nvidia GPU when using the new KAWPOW algorithm!