I needed more discs in my T20 but was out of ports, so purchased a used PERC H310 for £22 and flashed to IT mode. This has 2 ports enabling 8 SATA after flashing (and buying SAS to SATA cables). This works really well. Also added in a used drive cage from another Dell. Running SSD for OS and 5 discs. Temperatures are fine with the standard fan setup.
For the cost and minimal hassle (flashing), the H310 is an excellent buy IMO if you are looking to increase the port count.
Good info. Does this work fine within a virtual environment such as ESXI?