Dell Part Number: 8NPPY | DP/N: 08NPPY. CPU Socket: LGA1151. Ideal for replacing a failed motherboard or refurbishing Dell OptiPlex 3050 SFF systems. Model: OptiPlex 3050 SFF. This motherboard is designed specifically for the Dell OptiPlex 3050 Small Form Factor (SFF) system and may not be compatible with Micro Form Factor (MFF), Mini Tower (MT), or other Dell OptiPlex models.