Speed: 2933MHz (downgraded to 2666MHz with 8-core processor). Type: 256GB DDR4 ECC LR-DIMM (Load-Reduced DIMM). Maximum Supported RAM: Up to 1.5TB (12 x 128GB LR-DIMMs) with 24-core or 28-core processors; 1TB (8 x 128GB) with 8-core, 12-core, or 16-core processors due to practical slot limits.