The NZXT Kraken 240 RGB does not require a backplate for installation on most motherboards, as it typically uses a mounting bracket that attaches directly to the CPU socket. However, it's essential to ensure that the Kraken 240 is compatible with your motherboard's CPU socket type. The Kraken 240 supports AMD AM5 sockets, which are used by the ROG Strix B650-A Gaming Wifi motherboard. Therefore, you should be able to install the Kraken 240 without needing a separate backplate, but always refer to the specific installation instructions provided with the cooler for precise mounting details.