Chart below shows dependence on processor score in bottleneck calculation with AMD Radeon HD 8850M graphic card for General Tasks.
We recommend you to upgrade your processor with one of listed below. It will increase frames per second and graphic card utilization. Here is list of processors that will best work with your AMD Radeon HD 8850M graphic card. This processors with AMD Radeon HD 8850M will have less bottleneck than with your current Intel Celeron 420 processor.