models are generally stable, supporting up to 300 Mbps on the 2.4GHz band. However, it may struggle with modern high-speed connections (>100 Mbps) or heavy traffic environments.
Old 400MHz CPU may cause slow speeds in modern networks. dir 615 e proshivka skachat
Here is a useful review, along with guide resources on how to update it. DIR-615 E-Series : Practical Review The models are generally stable, supporting up to 300