Computers / Components / Memory / Memory Speed 1800 MHz, Capacity 4096 MB

Kingston KHX1800C9D3LK2/4GX  

DDR3, Capacity 4096 MB, Memory speed 1800 MHz, PC14400, CL 9 ms, 200 pin

Patriot PVV34G1800LLKB  

DDR3, Capacity 4096 MB, Memory speed 1800 MHz, PC14400, CL 8 ms