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 doesn’t respond or won’t 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.