Is SignalR Good option for Fixed interval Data Push Scenario for Larger Datasets?

Question

I have created an SignalR application (IIS Hosted) sending data to set of SignalR groups. noticed that clients stopped responding after some reconnects(100-150). Where as Server state is healthy, and unaware of Disconnected clients. This made me ask whether SignalR is a trusted/appropriate approach to be used for scenarios where data(250 KB approx) is pushed to 500 Groups at fixed interval, Each Group has unique data payload, and total connected clients subscribed to those groups can be 1000-1500.

Testing Environment: Win7 100 SignalR Clients. Win7 SignalR Server hosted on IIS. Total number of Clients connected to system are 1000. Total groups managed are 500.