The Headline Number Problem
"Gen 5 speeds" don't tell you if your next 120 GB patch will succeed. For gaming, sustained behaviour and cache design trump peak sequential numbers. A drive that posts 14 GB/s in a burst test may throttle hard during a launcher install — exactly when you need it most.
TLC vs QLC: The Real Difference
TLC with DRAM remains the safest primary drive choice:
- Predictable sustained writes
- Robust mixed-IO behaviour during installs
- Consistent shader-cache performance
QLC can work as a library drive — cheap capacity for finished games — if you leave ample free space and accept slower patch cycles. It's not useless, just situational.
The DRAM Cache Reality
DRAM-less drives aren't useless. On PCIe 4.0 with HMB 2.0, light gaming loads can feel fine. But launcher installs and verifications interleave big sequential payloads with small metadata writes. Having onboard DRAM prevents pathological slowdowns and timeouts.
SLC cache size and refill policy define user experience far more than a one-second peak in CrystalDiskMark.
Benchmarks That Actually Matter
Look for:
- Launcher-like installs (large sequential writes with periodic small IO)
- Shader compile/write tests
- Thermal-limited runs inside your actual case
Many drives throttle hard under a warm GPU. A simple heatsink or improved airflow can stabilise performance significantly.
Practical Rules
- Keep 10–15% free space — your SSD controller needs breathing room for wear levelling
- Update firmware on day one
- Prioritise models with local AU warranties and clear firmware tooling
If something goes sideways, RMA turnaround can trump a small synthetic speed win. Treat your game drive as critical infrastructure.
Sources: AnandTech (TLC/QLC behaviour, DRAM impact), ServeTheHome (sustained IO and thermal behaviour)