Turn off the computer and wait three to five minutes to let the computer cool before installing or replacing a memory module.

Your computer has 16 slots for installing or replacing DDR3 ECC UDIMMs or DDR3 ECC RDIMMs. When installing or replacing a memory module, use the following guidelines:

•Use either DDR3 ECC UDIMMs or DDR3 ECC RDIMMs for your computer. Do not install both the UDIMMs and RDIMMs into the same computer.

•Use 2 GB, 4 GB, or 8 GB UDIMMs in any combination up to a maximum of 128 GB.

•Use 2 GB, 4 GB, 8 GB, 16 GB, or 32 GB DDR3 RDIMMs in any combination up to a maximum of 512 GB.

•Always install DIMMs in the numerical order printed on the system board (DIMM1, DIMM2, DIMM3, and so on). Install memory modules into the blue color memory slots first. See “Locating parts on the system board” on page 10.

•If your computer has only one microprocessor installed, be sure to install memory modules only in the memory slots adjacent to that microprocessor.

•If your computer has two microprocessors installed, install equal numbers of memory modules in both sets of microprocessor DIMM slots for maximum performance.

To install or replace a memory module, do the following:

1.Turn off the computer and disconnect all power cords from electrical outlets.

2.Remove the computer cover. See “Removing the computer cover” on page 30.

3.Lay the computer on its side for easier access to the system board.

4.Locate the memory slots. See “Locating parts on the system board” on page 10.

5.Remove any parts that might prevent your access to the memory slots. Depending on your computer model, you might need to remove the PCI Express x16 graphics card for easier access to the memory slots. See “Installing or replacing a PCI card” on page 32.

6.For some computer models, you might need to remove the memory fan duct to get access to the memory slots. To remove the memory fan duct, disconnect the memory fan cable from the system board. See “Locating parts on the system board” on page 10.

7.Pull the fan duct tab outward and pivot the fan duct, and then disengage the rear of the fan duct. Note: Not all computer models have the memory fan duct.

Figure 14. Removing the memory fan duct

8. Depending on whether you are installing or replacing a memory module, do one of the following:

Chapter 5. Installing or replacing hardware 35

Page 46 Page 48
Page 47
Image 47
Lenovo 4229, 4223, 4228 manual Removing the memory fan duct
Page 46 Page 48

4229, 4223, 4228 specifications

Lenovo has long been recognized for its commitment to producing high-quality computing solutions, and the ThinkPad line is no exception. Among its various models, the Lenovo ThinkPad series 4228, 4223, and 4229 stand out for their robust features and reliable performance, making them ideal choices for business and professional use.

The Lenovo ThinkPad 4228 series is engineered with a focus on durability and performance. One of its key features is the powerful Intel Core processor range, which ensures that users can manage demanding applications and multitask efficiently. Alongside this, the device typically comes equipped with ample RAM, providing speed and responsiveness that enhances productivity.

Moving to the ThinkPad 4223, it streamlines user experience with advanced connectivity options. The inclusion of multiple USB ports, HDMI, and Ethernet capabilities allows for seamless integration with various devices and networks. The 4223 model often houses a backlit keyboard, enabling users to work effortlessly in low-light environments. This model puts a strong emphasis on portability, making it a reliable companion for professionals on the move.

The ThinkPad 4229 takes connectivity a step further by offering options like Wi-Fi 6 and Bluetooth, ensuring fast and stable connections whether in the office or on the go. This model is often equipped with a higher resolution display, contributing to a better viewing experience for video conferencing and presentations. Its extended battery life is a notable feature, allowing users to remain productive without the constant need for recharging.

All three models in the 422x series boast Lenovo’s robust security features, including fingerprint readers and TPM (Trusted Platform Module), which safeguard sensitive data against unauthorized access. Furthermore, the reputation of Lenovo ThinkPads for their exceptional keyboard layout ensures that users can type comfortably over extended periods, reducing strain and increasing efficiency.

In summary, the Lenovo ThinkPad 4228, 4223, and 4229 models represent a blend of power, durability, and user-friendly design. With their focus on connectivity, performance, and security, these laptops cater perfectly to the needs of professionals and businesses, confirming Lenovo's status as a leading manufacturer in the world of computing technology. Whether you need a rugged workhorse for heavy tasks or a portable device for meetings, the ThinkPad series provides versatile solutions to meet any requirement.
Top Page Image Contents