Samsung ProXpress C268x series User Manual page 286

Installing accessories
6
Upgrading a memory module
Your machine has a dual in-line memory module (DIMM). Use this memory module slot to install additional memory. We recommend the use of only genuine
Samsung DIMM's. You may void your warranty if it is determined that your machine problem is being caused by third party DIMM's.
The order information is provided for optional accessories (see "Available accessories" on page 273).
After installing the optional memory, you can use the advanced printing features, such as proofing a job and specifying of printing a secure print job in the printer
properties window.
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14. Maintenance