For an i9 on an LGA-2066 socket, you can use a CryoSheet that is compatible with the CPU's dimensions and socket type. Since the Silent Loop 2 supports LGA-2066, ensure the CryoSheet is designed for this socket size. Typically, CryoSheets are not specific to water coolers but rather to CPU sockets, so any CryoSheet compatible with LGA-2066 should fit. However, specific CryoSheet models are not detailed in the provided information, so you may need to check compatibility with the CryoSheet manufacturer.