4GB Samsung 4 x 1GB DDR3-1066MHz ECC Unbuffered Server Memory 1Rx8 PC3-8500E-07-10-D0 M391B2873EH1-CF8 Removed from working machine. Tested. Key Features: Brand: Samsung Model: M391B2873EH1-CF8 Memory Clock 133Mhz Cycle Time 1.875ns Bus Type PC-8500 Error Correction ECC Rank 1 Data Transfer Rate 1066Mhz Number of Modules: 4 Capacity per module: 1GB Total capacity: 2GB Pins: 240 Voltage: 1.5V Ranks: 1Rx8 ? Shipping: In most cases, purchased item ships within 24 hours on the next business day. Payment: I prefer PayPal payments only please. It is your best protection as a buyer. Payment is expected within 2 business days. Otherwise, the order will be cancelled and item relisted. Feedback Seller Rating: The customer satisfaction is always will be my Top Priority! Any problem with your purchase please contact me via "Contact Seller" button and I will do my best in order to resolve the issue fairly. If you're happy with the purchase, please leave me a 5 Star ***** Seller Rating and Feedback. This is important for me. I will do the same in return. Thank You! ? Please email with any questions you might have. Thank you for looking!