For video, photo, and audio editing, a RAM disk is not about raw speed alone. It is about reducing scratch and cache latency, avoiding write amplification on your SSD, and keeping your timeline responsive when your editor is hammering temp files. The optimal setup balances stability, persistence, and available system RAM so you do not starve Premiere Pro, DaVinci Resolve, After Effects, or Photoshop while still getting the benefit of RAM-speed I/O.
Prioritize three things in this order: 1) Leave enough RAM for your editing application and OS to avoid paging to disk, 2) Put only volatile, regenerable data on the RAM disk (cache, scratch, previews, temp exports), never your only copy of a project, and 3) Configure the RAM disk to save and restore safely so a crash or reboot does not corrupt your workflow. Every setting below trades performance for safety or capacity, so the best values keep your system stable first and fast second. In 2026 the same principle applies even with DDR5 and PCIe 5.0 SSDs, because RAM latency is still an order of magnitude lower than even the fastest NVMe drive.
Quick Recommended Settings
| Setting | Recommended value | Why |
|---|---|---|
| RAM Disk Size | 25% to 33% of total physical RAM, max 50% (e.g., 8 GB on 32 GB, 16 GB on 64 GB) | Leaves headroom for editing app, OS, and background processes to prevent paging |
| File System | NTFS | Supports large files over 4 GB, journaling, and permissions required by Adobe and Blackmagic cache |
| Allocation Unit Size (Cluster Size) | 16 KB or 32 KB | Matches typical video cache blocks and reduces fragmentation without wasting space |
| Drive Letter | R: or another high, static letter | Prevents conflicts with removable drives and keeps scratch paths consistent |
| Image File Persistence | Enabled: Save at shutdown, Load at boot (SoftPerfect: Image File on SSD) | Retains folder structure across reboots without copying active project files |
| Volatile vs. Persistent Content | Volatile only – cache, scratch, previews | Prevents data loss; project files and exports stay on physical SSD/HDD |
| Temp Folders to Move | Adobe Media Cache, Photoshop Scratch Disk, Resolve CacheClip, Windows TEMP/TMP, browser cache if needed | Places high-I/O temp writes on RAM where latency matters most |
| Windows Page File | Keep page file on NVMe SSD, do not place on RAM disk | Avoids circular dependency and instability when RAM is full |
| TRIM / Compression / Indexing | Disable all on RAM disk | Unnecessary on volatile RAM and adds CPU overhead |
| Image Save Mode | Synchronous save at shutdown, not continuous background save | Reduces constant SSD writes while still preserving structure |
Setting-by-Setting
1. RAM Disk Size: Reserve Headroom First
Recommended value: Set the disk to 8192 MB on a 32 GB system, 16384 MB on a 64 GB system, or 24576 MB on a 96 GB system. Range: 4096 MB to 32768 MB depending on total RAM. Never allocate more than 50% of installed RAM.
Where to set it: In SoftPerfect RAM Disk go to File > Add RAM Disk > Size. In ImDisk Toolkit run RamDisk Configuration > Basic > Size. In AMD Radeon RAMDisk open Settings > Disk Size slider.
Trade-off: A larger RAM disk holds more previews and cache, so fewer cache misses and timeline re-renders. Too large, and Windows will page editing apps to your SSD, which eliminates any RAM disk benefit and can cause out-of-memory errors during export. If you see Commit Charge in Task Manager > Performance > Memory exceeding 85% during editing, reduce the RAM disk by 2048 MB increments.
2. File System and Allocation Unit Size
Recommended value: NTFS with 16 KB or 32 KB allocation unit size. Quick Format enabled. Volume label: RAM_SCRATCH
Where to set it: In the RAM disk creation window, select File System: NTFS and Allocation Unit Size: 16384 or 32768 bytes. On an existing RAM disk, you cannot change this without reformatting via Disk Management (Win + X > Disk Management > right-click R: > Format).
Trade-off: NTFS is required for files larger than 4 GB and for Adobe cache files that use NTFS alternate streams. 16 KB clusters balance I/O efficiency for thousands of small cache files versus waste on larger preview files. 64 KB reduces fragmentation for 4K ProRes previews but wastes space for small audio peak files. FAT32 or exFAT will fail on large renders.
3. Drive Letter and Mount Point
Recommended value: Static letter R: with mount folder at C:\RAMDisk_Mount for fallback access.
Where to set it: SoftPerfect RAM Disk > Add RAM Disk > Drive Letter: R: > check Create mount folder: C:\RAMDisk_Mount. Windows Settings > System > Storage > Disks & volumes can also reassign if needed.
Trade-off: A fixed high letter never collides with USB drives (which take D:, E:, F:). A mount folder ensures cache paths still resolve if the drive letter fails after a Windows update. Do not use A: or B:, which are reserved for legacy floppy handling.
4. Image File Persistence and Load/Save Behavior
Recommended value: Create an image file on your fastest SSD at C:\RAMDiskImages\RAM_SCRATCH.img. Enable Load image at startup and Save image at shutdown. Disable Save in real time / continuous save. Set Save Mode to Synchronous.
Where to set it: SoftPerfect RAM Disk > Add RAM Disk > check Create image file > Path: C:\RAMDiskImages\RAM_SCRATCH.img > check Save Contents to Image > On System Shutdown. In ImDisk check Load Image at Startup and uncheck Enable Periodic Saving.
Trade-off: Loading and saving only at boot and shutdown gives you an empty folder structure ready after reboot without hammering your SSD with constant writes every 5 minutes. Continuous save protects against power loss but defeats the purpose by writing RAM contents to SSD all day. Never store the image on a hard drive; slow image load will stall boot.
5. Windows TEMP and TMP Environment Variables
Recommended value: Point both TEMP and TMP to R:\TEMP
Where to set it: Press Win + R, type sysdm.cpl, press Enter > Advanced > Environment Variables > Under User variables and System variables edit TEMP and TMP to R:\TEMP. Create the folder R:\TEMP manually first. Reboot to apply.
Trade-off: Many encoders and plugins dump intermediate files to %TEMP%. Moving it to RAM cuts temp I/O latency. Some installers expect TEMP on C: and may fail if R: is full, so keep at least 2 GB free on R: and revert to C:\Windows\Temp if an installer errors.
6. Application Scratch Disks and Cache Paths
Recommended value: Move only cache and scratch, not project files.
Where to set it: Adobe Premiere Pro: Edit > Preferences > Media Cache > Media Cache Files: Browse to R:\AdobeCache and R:\AdobeMediaCache. Adobe Photoshop: Edit > Preferences > Scratch Disks > check R: and move it to top. After Effects: Edit > Preferences > Media & Disk Cache > Choose Folder: R:\AECache. DaVinci Resolve: DaVinci Resolve > Preferences > Media Storage > Cache files location: R:\ResolveCache and Fusion Cache: R:\ResolveFusion. Set CacheClip folder via Playback > Delete Render Cache > location.
Trade-off: Keeping scratch on RAM makes scrubbing, peak file generation, and conforming faster. If R: fills up, Premiere will show Media Cache write errors and Resolve will stop background caching. Set maximum cache size in each app to 70% of your RAM disk size to leave headroom.
7. Indexing, Compression, and TRIM
Recommended value: All disabled.
Where to set it: In File Explorer right-click R: > Properties > uncheck Allow files on this drive to have contents indexed and Compress this drive to save disk space. Do not run defragmentation on R: (Optimize Drives tool lists RAM disks; leave it unoptimized).
Trade-off: NTFS indexing and compression add CPU overhead on every cache write for zero benefit on volatile storage. Defragmenting a RAM disk is pointless and wastes cycles.
By Hardware Tier
Low Tier: 16 GB Total RAM (Laptops and Budget Desktops)
Do not create a large generic RAM disk. Limit to 4096 MB maximum. Use it exclusively for one app at a time. Recommended config: NTFS 16 KB, R: drive, image file disabled to save SSD space. Set Photoshop Scratch Disk to R: only if you work on files under 500 MB; otherwise leave scratch on SSD. For Premiere or Resolve on 16 GB, it is better to use R:\TEMP for system temp only and leave Media Cache on NVMe SSD under C:\Users\[YourName]\AppData\Roaming\Adobe\Common. If Task Manager shows Memory at 90% or higher with Chrome and Premiere open, delete the RAM disk and add physical RAM before trying again. Path to check: Ctrl + Shift + Esc > Performance > Memory.
Mid Tier: 32 GB to 64 GB Total RAM (Most Editing Rigs)
This is the sweet spot for RAM disks. Create an 8192 MB to 16384 MB RAM disk, NTFS 32 KB, with boot image at C:\RAMDiskImages\RAM_SCRATCH.img set to load at boot and save at shutdown only. Move all of these: R:\TEMP for Windows TEMP/TMP, R:\AdobeCache for Premiere Media Cache, R:\AECache for After Effects, R:\PSCache for Photoshop temp, and R:\ResolveCache for Resolve. In Premiere set Edit > Preferences > Media Cache > Automatically delete cache files older than 7 days to prevent R: from filling. Reserve 1 GB free on R: at all times. If you edit 4K H.264/H.265 daily, favor 16384 MB; for 1080p or proxy workflows 8192 MB is enough and leaves more RAM for After Effects RAM Preview.
High Tier: 96 GB to 128 GB+ Total RAM (Workstations)
You can run a 24576 MB to 32768 MB RAM disk and still leave 64 GB+ for apps. Use NTFS 32 KB or 64 KB if you primarily cache large preview files. Create two separate RAM disks if your software allows: R: 16384 MB for Adobe cache and S: 16384 MB for Resolve Fusion cache and temp exports. Enable synchronous image save at C:\RAMDiskImages\ and D:\RAMDiskImages\ on separate NVMe drives to split boot load. High-tier users should also move their current export temp folder to RAM when doing iterative renders: In Premiere Edit > Preferences > Scratch Disks > Video Previews and Audio Previews to R:\Previews, and in Media Encoder uncheck Use Previews on final export so only intermediate files use RAM. Monitor with Resource Monitor (Win + R > resmon > Memory tab) to ensure Hard Faults/sec stays at 0 during export.
Common Mistakes
Mistake 1: Putting Project Files or Exports on the RAM Disk as Primary Storage
What causes it: Users point Premiere project save location or DaVinci project library to R: for speed. How to check: In Premiere look at File > Project Settings > Scratch Disks > Project Auto Save path. If it starts with R:\, you are at risk. What to do: Move project .prproj and Resolve database to C:\Projects or D:\Projects on physical SSD. Keep only cache on R:. How to undo: Copy files from R:\ back to SSD before shutdown if you made this mistake, then in app preferences Browse back to SSD path and restart.
Mistake 2: Allocating Too Much RAM and Causing Paging
What causes it: Setting RAM disk to 75% of RAM leaves no room for Premiere RAM Preview. How to check: Press Ctrl + Shift + Esc > Performance > Memory > watch during export. If usage hits 95%+ or disk activity spikes on C: with Page File writes, you are paging. What to do: Reduce RAM disk size by 4096 MB in SoftPerfect RAM Disk > Properties or recreate with smaller size, then reboot. What to undo / revert: Recreate larger size only after upgrading physical RAM. Do not compensate by disabling the Windows page file.
Mistake 3: Enabling Continuous Image Saving
What causes it: Checking Save image every 5 minutes or real-time sync. How to check: SoftPerfect RAM Disk > Edit RAM Disk > Image File settings shows Save Periodically enabled or ImDisk shows Periodic Saving checked. What to do: Uncheck periodic saving, keep only Save at Shutdown. Manually save via RAM Disk menu > Save Image Now only before major system changes. How to undo: If SSD wear or stutter occurred, disable periodic save and delete old large .img delta files in C:\RAMDiskImages\ to reclaim space.
Mistake 4: Using FAT32 or Wrong Cluster Size for Video Cache
What causes it: Default FAT32 format limits files to 4 GB and causes failed renders. How to check: File Explorer right-click R: > Properties > File system. How to do: Reformat correctly via Win + X > Disk Management > right-click R: > Format > NTFS > Allocation unit size 16384 or 32768. What to do: After reformatting, re-point Adobe and Resolve cache paths to R:\ and delete stale cache via Edit > Preferences > Media Cache > Delete. How to undo: If you need FAT32 for a specific device, create a second small RAM disk formatted FAT32, do not reuse R:.
Mistake 5: Moving the Windows Page File to the RAM Disk
What causes it: Guides suggest putting pagefile.sys on RAM for speed. How to check: Win + R > sysdm.cpl > Advanced > Performance Settings > Advanced > Virtual Memory > Change shows paging file on R:. What to do: Set paging file to System managed size on C: (NVMe) and set No paging file on R:. Reboot required. How to undo: Re-enable system managed paging on C: and remove entry for R: in the same dialog, then reboot.
FAQ
Should I put my entire editing project on the RAM disk?
No. Use the RAM disk only for regenerable data like media cache, peak files, previews, and TEMP. What causes confusion is that timeline scrubbing feels faster when everything is on RAM, so users move .prproj or .drp files there. How to check if you are safe: Your project save path under File > Project Settings or Resolve Project Manager should be on C: or D: physical drive. What to do: Keep active projects on NVMe SSD and set Premiere Edit > Preferences > Media Cache to R:\AdobeCache. How to undo: If you already moved projects, copy the entire project folder from R:\ to SSD before shutdown, relink media, and change Auto Save location back to SSD.
Will a RAM disk improve export times?
Only for workflows bottlenecked by cache I/O, not for final encoding. What causes the misconception is expecting the encoder itself to run on RAM. How to check: Monitor during export with Task Manager > Performance. If CPU or GPU is at 95%+ while Disk is low, the RAM disk will not change export time. What to do: Use the RAM disk for previews and cache to speed up editing and conforming, then export to your physical SSD at D:\Exports. For iterative previews, set scratch previews to R:\Previews to reduce preview render latency. How to undo: If export fails with scratch disk full errors, move previews back to SSD via Edit > Preferences > Scratch Disks.
What do I do if the RAM disk fills up mid-edit?
What causes it: Cache max size set too high or old cache never purged. How to check: File Explorer shows R: free space under 500 MB or Premiere shows Media cache database write failed. What to do: In Premiere Edit > Preferences > Media Cache > Delete Unused Media Cache Files, in Resolve Playback > Delete Render Cache > All, and in Windows run Disk Cleanup on R:\TEMP via Win + R > cleanmgr > select R:. Set cache limits to 70% of RAM disk size (e.g., 6 GB limit on 8 GB disk). How to undo: If you deleted needed previews, regenerate via Sequence > Render In to Out or Resolve Render Cache Clip Output.
Do I need to recreate the RAM disk after every Windows update?
Sometimes. What causes it: Major Windows updates can remove virtual disk drivers or reset drive letters. How to check: After update, File Explorer missing R: or SoftPerfect shows Disk not mounted. What to do: Reinstall or repair your RAM disk software (SoftPerfect RAM Disk installer > Repair), then File > Add RAM Disk with same size, letter, and image path C:\RAMDiskImages\RAM_SCRATCH.img. Re-apply TEMP paths via sysdm.cpl and cache paths in each editing app. How to undo: If the letter was taken by a new USB drive, change that USB drive letter in Disk Management > right-click drive > Change Drive Letter and Paths, then reassign R: to RAM disk and reboot.
