4GB 1333 offers less storage than 6GB 1066.
4GB 1333 offers less storage than 6GB 1066.
Your setup has a 1x4GB RAM with an i5 2520 core. Adding a 1x2GB RAM upgrade at 1066MHz would be a downgrade, while swapping to a dual-channel 6GB at 1066MHz would boost performance. The single-channel 4GB at 1333MHz is slower compared to the dual-channel option. Let me know if you need more details!