Photoshop errors “Could not Save As because there is not enough Memory (RAM)” and “Could not use the Quick Selection because there is not enough Memory (RAM)” usually occur on systems with less than 2 GB of RAM. In other cases, the “Not enough RAM” error occurs on systems that have enough memory (4 GB or 8 GB) but not enough space (at least 3.1 GB).

Before proceeding, make sure that your system meets the basic requirements for running Photoshop:

Disable background applications

 

Change a registry entry

Increase RAM

Provide the correct amount of RAM. The fact is that with the default settings, the software tries to load your computer to the bare minimum and uses a minimum RAM size of 1 to 1.5 GB. However, it should be noted that if you are working with several heavy files or creating a 3D model, this is just not enough.

STEP 1. Launch the program.

STEP 2. Open the main menu and choose Edit.

STEP 3. Open the Settings tab.

STEP 4. Select the Performance window.

STEP 5. Use the slider to set Photoshop memory usage to 4000 or 100%.

STEP 6. Save your changes.

Update or reset Windows 10 version 1803

After a thorough review of user comments and technical permissions, it has been determined that there is a serious problem with Windows 10 version 1803 that directly affects Photoshop CC 2017, 2018, 2019, and 2020, causing the physical memory error in question. Photoshop works well with Windows 10 version 1703 or 1709, as tests were done on different systems.

Rolling back Windows 10 Creators Update to a previous version or upgrading to a new version, if available, is aimed at resolving this issue. Many users in the online support community are reported to be working. To check if Windows updates are available, follow these steps:

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