SSD marketing leads with one big number — peak sequential read speed — and for creators, that number is close to meaningless. What actually matters when you're moving large video files or working with big projects is sustained write performance: how fast the drive keeps writing once you've thrown more data at it than its cache can hold. And this is where cheaper "DRAM-less" drives fall into a trap, posting great benchmarks but crawling during the real work. This guide explains the trap and how to avoid it.
It builds on QLC vs TLC vs MLC and our NVMe buying guide.
Why Benchmarks Lie
Benchmark and peak-speed figures are measured in short bursts that fit inside the drive's fast cache (the SLC cache). So almost any modern NVMe drive looks blazing fast in a benchmark. But that burst speed isn't what you experience when you copy a 100GB video project: once the cache fills, the drive drops to its native sustained speed — which on cheaper drives can be dramatically slower. The headline number describes the sprint; sustained write is the marathon, and the marathon is what creators actually run.
The DRAM-Less Trap
Many budget NVMe drives omit a DRAM cache to cut costs ("DRAM-less"), relying instead on a feature called HMB that borrows a little system RAM. The result:
- They benchmark fine and feel fast for everyday use and gaming — for those uses, DRAM-less is acceptable.
- But under sustained heavy writes, they slow down more and handle large transfers and random-heavy workloads worse than DRAM-equipped drives.
- For creators moving large files regularly, a DRAM-equipped drive is noticeably better and worth the modest premium.
How to Avoid It
- Look beyond the peak speed: check the drive's sustained write behaviour in reviews, not just its headline number.
- Prefer a DRAM-equipped, TLC drive for any creative or write-heavy use — the combination that holds speed under real load.
- Use a dedicated working/scratch drive for video and project files, separate from your boot drive — a fast, DRAM-equipped drive here pays off daily, as our video-editing build guide recommends.
- DRAM-less is fine for a boot drive, gaming, or general use on a budget — match the drive to the job.
The Nigeria Tax
Creators in Nigeria can't easily return a disappointing drive, so it pays to get this right: for editing and large-file work, spend the modest extra on a quality DRAM-equipped TLC drive that holds its speed under sustained load. Don't be seduced by a cheaper drive's big benchmark number — it describes a sprint your workload never runs. For gaming or a boot drive, a good DRAM-less drive is fine and saves money.
Frequently Asked Questions
What is sustained write performance? How fast an SSD keeps writing once you exceed its fast cache — the speed you actually experience copying large files. It's far more relevant for creators than the headline peak speed, which is measured in short bursts that fit the cache.
Is a DRAM-less SSD bad? Not for gaming, a boot drive, or general use — it's fine and cheaper there. But under sustained heavy writes (large video files, big projects), DRAM-less drives slow down more, so creators should choose a DRAM-equipped drive.
How do I avoid the trap? Look at sustained write behaviour in reviews, not just peak speed; prefer a DRAM-equipped TLC drive for creative/write-heavy work; and use a dedicated fast scratch drive for video projects.
The One Thing to Remember
An SSD's headline speed describes a sprint your real workload never runs — for creators, sustained write performance is what matters, and that's where cheap DRAM-less drives disappoint despite great benchmarks. For editing and large-file work, buy a quality DRAM-equipped TLC drive that holds its speed under load; for gaming or a boot drive, DRAM-less is fine. Match the drive to the job, and look past the big number.
Building for creative work? Configure a build online → or talk to our team → and we'll spec a DRAM-equipped drive that keeps up with your projects.