4x DIMM slots supporting up to 64GB of DDR4-2666 ECC or non-ECC RAM.
: Instructions for utilizing the 4 DIMM slots, which support up to 64 GB of DDR4-2666 ECC or non-ECC RAM. I/O Clarity
The motherboard usually contains several USB 2.0 and USB 3.0 headers. Hp Z2 G4 Motherboard Manual
If you plan to keep your Z2 G4 running for another 3-5 years, download the manual today. Bookmark the power pinout, memorize the beep codes, and tape the jumper configuration inside the case cover. Your future self—troubleshooting a no-boot situation at 11 PM before a deadline—will thank you.
From top to bottom (Tower variant):
If a bad overclock (via Intel XTU) bricks the system:
Before diving into the hardware specifics, it is vital to know where to find the official documentation. HP refers to the "manual" by several names, which is often why users struggle to locate it via search engines. 4x DIMM slots supporting up to 64GB of
The Maintenance and Service Guide provides a complete illustrated parts catalog and removal/replacement procedures for the motherboard.