Lenovo W510 Model 4389-23U Notebook for sale. Windows 10 Pro installed and activation confirmed 8 Gig RAM 15.6" 1600x900 LED Screen (new screen installed) Core i7 i7-820QM 1.73GHz NVidia Quadro FX 880M Video Card 120 Gig SSD drive This model has higher quality Lenovo keyboard that was changed as of the 230/430/530 series. Lenovo 135Watt Power Supply small chip in front left corner (see last picture) - note this is a common for this case type when opening up for maintenance.