Storage · high

How to fix SSD DRAM cache failure

Storage troubleshooting guide

What this error means

An SSD without a DRAM cache (DRAM-less) is extremely slow when writing large files or reading small files. It's also often linked to defragmenter running on SSD instead of TRIM.

Updated

Before you begin

Save open work and back up important files. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.

Work through these checks

0 of 3 complete
01Don't use defrag on SSD (TRIM only)
  1. Don't use defrag on SSD (TRIM only)
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
02Upgrade to SSD with DRAM cache (Samsung 990 Pro, WD SN850X)
  1. Upgrade to SSD with DRAM cache (Samsung 990 Pro, WD SN850X)
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
03Leave at least 10-15% free space
  1. Leave at least 10-15% free space
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors

Possible causes

  • Cheap DRAM-less NVMe (QLC NAND without cache)
  • Filled SLC cache layer
  • Defragmenter running on SSD instead of TRIM