ECC RAM!Building or uprading your server? This 512 MB of PC2100 DDR RAM by Samsung is ECC-Registered and ready to go! Just pop it into an available 184-pin DIMM slot on your compatible motherboard and you've got an extra 512 MB of memory capacity! This RAM is rated at PC-2100 with a peak transfer rate of up to 2.1 GB/s and operates at 266 MHz! Order now!