The 4GB RAM memory from PHS-memory is specifically designed for the Apple iMac Core i5 2.5GHz 21.5-inch (Mid 2011) and provides a reliable and powerful memory upgrade. With a memory clock frequency of 1333 MHz and the DDR3 SO-DIMM form factor, this RAM is optimally tailored to meet the requirements of the iMac. Installation is straightforward and allows for a noticeable improvement in system performance, especially during multitasking and resource-intensive applications. The memory is designed to operate at a voltage of 1.5 volts, ensuring stable and efficient performance. This memory configuration is an ideal choice for users looking to enhance their iMac's performance without compromising compatibility.

• 100% compatible with Apple iMac Core i5 2.5GHz 21.5-inch (Mid 2011)
• Memory clock frequency of 1333 MHz for improved performance
• DDR3 SO-DIMM form factor for easy installation
• Stable performance at a voltage of 1.5 volts.