Dell Optiplex GX620 USFF V3 Motherboard-PJ149 Part Number: PJ149 Alternate Part Number: DF131 YH405 MH415 U8811 JD961 KG317 Type: Motherboard Supported Processor; Intel Pentium 4, Pentium D, Celeron, or Core processor Compatible Model: Dell OptiPlex GX620