I have a Silicon Power 1TB P34A60 Gen3x4 NVMe SSD, and I've noticed that its write speed is only around 279 MB/s according to CrystalDiskMark, which is much lower than the advertised specs. On the other hand, the read speed is impressive at 3210 MB/s. I still have about 15% of storage left. Is this kind of performance normal for this SSD?
3 Answers
That slow write speed can happen especially when the SSD is somewhat full. Since your SSD is likely a QLC type, it's more common to see these lower speeds as they fill up, especially when nearing capacity.
Actually, 279 MB/s is quite decent for a native non-cached write speed on a 1TB QLC. You might still be experiencing some SLC caching here, but not at peak performance. Generally, drives that hit higher than 200 MB/s for native QLC write speeds are usually over 2TB due to needing multiple NAND channels to pull that off.
It's worth checking, but isn't your SSD a TLC? That could definitely explain some differences in performance.
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