BenchmarkReviews.com: Back on March 2011, Seagate debuted their original Barracuda XT 3TB hard drive, model ST33000651AS, which used five platters to supply 3000 gigabytes of capacity over a SATA 6Gb/s interface. Seven short months later, they've returned to introduce a replacement: the Seagate Barracuda 3TB hard drive ST3000DM001, which features the same 6 GB/s interface and 64MB cache buffer but now utilizes only three 1GB density platters. Seagate has also introduced a number of refined technologies to help improve overall hard drive performance, including: dual core 40nm processor technology, DDR2 DRAM buffer, and refined caching algorithms. By reducing disc platters from five to three, it prolongs servo motor life and reduces heat output. Benchmark Reviews compared these two hard drives, to see exactly what's been gained.