The Kingston KP223C-ELD 2x2Gb PC3-10600 1333Mhz DDR3 Desktop Memory RAM is a high-quality memory module designed for desktop computers. Made by Kingston, a trusted brand in the industry, this DDR3 SDRAM module has a total capacity of 4GB spread across 2 modules, each with a capacity of 2GB. With a bus speed of PC3-10600 (DDR3-1333) and 240 pins, this memory module is perfect for boosting the performance of your computer. Made in China, this product ensures reliable performance and quality for your computing needs.

Both taken from working system and work perfectly.