Seagate ST3500641A 500GB UDMA/100 7200RPM 16MB IDE Hard Drive Seagate ST3500641AS 500 GB 7200 RPM UDMA/100 IDE Hard Drive General Features: 500 GB formatted capacity 7200 RPM spindle speed UDMA/100 IDEinterface 16MB buffer 8.2 ms average seek time 4.16 ms average latency 3.5-inch form factor Power Specifications: +5V - 0. +12V - 0.56A Regulatory Approvals: UL CE C-Tick BSMI MIC