@WandererUber high latency, CrystalDiskMark doesn't fully cover every workload
@WandererUber It might be a bit scuffed, but I was copying TF2 so the high load is from random writes.
This drive has about 90GB of cache so sequential writes under that can go full speed and only then it drops to HDD speeds.
If 125 MB is the maximum it has seen, it will show "100%" load, even though the SSD might be capable of more.
That's why I asked how sure you are that this is in fact the bottleneck.