A:AnswerYes it would be able to replace that older power supply. The main difference is going to be the number of Molex connectors for older devices/fans. This power supply only has 4 of those and focuses mainly on SATA power connections for those devices. So you might need to use some adapters if you have more than 4 devices or fans that need Molex connectors.
A:AnswerYes it will and it will be a good addition to the razer lian li case and you can control the rgb lights on the power supply through Razer Synapse 3 BETA.