Usually, when discussing streaming, the main bottleneck can be the internet bandwidth available at the server side. You will need to make sure that your server has enough bandwidth available to deliver the streams to all your connected clients. Here is a high level formula that you can use for calculating the necessary bandwidth for your server:
Total Bandwidth = streaming clients * stream bandwidth + 20% IP overhead.
Of course, different hardware setups behave differently and in order to know your server/system total capacity, you should perform your own tests on the hardware running your Wowza Streaming Engine software.
To request the Load Test Tool, click the link at the bottom of this page. In order to get the Load Test Tool, you must electronically sign a Load Testing Software Agreement. To complete that agreement, you'll need the last five (5) digits of your Wowza Streaming Engine software license key and a valid email address. After you've signed the Load Testing Software Agreement and Wowza has verified your information, you'll receive an email within three (3) business days that includes download instructions.
We do have a list of supported NVENC GPU cards which can be seen in the article below.