TR has quad-channel and unofficial ECC support. TR Pro has 8-channel memory and official ECC support, along with support for RDIMMs. The max RAM for a TR is 25

TR has quad-channel and unofficial ECC support. TR Pro has 8-channel memory and official ECC support, along with support for RDIMMs. The max RAM for a TR is 256GB right now, with 8x32GB - only unbuffered DIMMs are supported. TR Pro can take up to 2TB RAM.