Overview
Photoshop can report a "not enough memory (RAM)" error even on capable PCs, usually because of its memory allocation setting, a full scratch disk, or a registry quirk. This guide covers the reliable fixes.
Key Takeaways
- Photoshop caps how much RAM it uses in its performance settings.
- A full or missing scratch disk also triggers memory errors.
- Raising the memory allocation often resolves it immediately.
- A known registry override addresses a specific reporting bug.
Increase Memory Allocation
1. Open Photoshop and go to Edit > Preferences > Performance.
2. Raise the Let Photoshop Use slider to around 70–80% of your RAM.
3. Set a scratch disk with plenty of free space.
4. Click OK and restart Photoshop.
Additional Fixes
1. Free space on the scratch disk drive so Photoshop has working room.
2. Close other memory-heavy apps before large edits.
3. If the error persists, apply the documented OverridePhysicalMemoryMB registry value for your RAM amount.
4. Update Photoshop and your graphics driver.
Warning: Back up the registry before adding the memory override value, as incorrect edits can cause other problems.
Troubleshooting
Problem: The error appears despite plenty of RAM.
Solution: Raise the memory slider in Performance settings and set a scratch disk with free space.
Problem: The scratch disk is full.
Solution: Free space on that drive or point the scratch disk to another drive with room.
Problem: Photoshop misreports available memory.
Solution: Apply the documented OverridePhysicalMemoryMB registry value matching your installed RAM.
Problem: Performance is still poor.
Solution: Enable the graphics processor in Performance settings and update your GPU driver.
Conclusion
The Photoshop memory error is almost always about allocation and scratch space. Raise the memory limit, give the scratch disk room, and Photoshop should run without complaint.
About TechHub
This guide is part of the TechHub Knowledge Base. For more step-by-step IT guides and support, visit techhub.com.lk.
