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Samsung 970 EVO low IOPS performance


I recently bought this drive. I have Windows 10 on it with 335GB free. Samsung NVMe driver is installed. Newest firmware and it uses PCIe 3.0 with 4 lanes.

Data Transfer speeds are OK, but IO performance is half or lower than 30% of what others report.

For example:,14.html shows 129693 IOPS but mine only does 33944 IOPS.

Samsung Magician shows only about 115000 read and 100000 write IOPS

Any idea why?