Kingston ValueRAM 4GB No Heatsink DDR4 2666MHz System Memory Kingston offers extremely reliable, high performance desktop memory and sells more laptop upgrade memory than anyone in the world. Add reliable Kingston memory and watch your productivity soar. Pages will load faster and launching new applications will be easier and faster. If your system is lagging, or a program doesnt respond or wont load, you may have a memory shortage. You may see subtle signs, like poor performance in everyday tasks, or you may be receiving out of memory messages. Laptop and PC manufacturers often include standard low-capacity memory modules to reduce cost, which means even new computers may need memory upgrades right out of the gate. Two options: Remove and replace these existing smaller capacity modules, or fill unoccupied memory slots. Memory Capacity 4GB (1 x 4GB) Memory Type DDR4 Module Type DIMM Memory Speed DDR4-2666MHz Pin Configuration 288-pin Registered/Unbuffered Unbuffered Error Correction Non-ECC CL-tRCD-tRP-tRAS CL19 Heat Sink No Working Voltage 1.2 V Chip Organization x16 Data Width x64 RankRank 1R (Single Rank)