We used CrystalDiskMark 8’s custom settings to test the drive's 4K 70/30 mixed read/write performance through a range of queue depths using a single thread and four threads.
The Samsung 980 Pro Heatsink has no Problem dealing with our 70/30 read/write tests either with a single thread or four threads. With a single thread, the drive climbs from 24,629.4 IOPS (100.88MB/s) at QD1 up to 113,973 IOPS (466.83MB/s) at QD32.
With four threads the drive goes from 89,507 IOPS (366.62MB/s) at QD1 up to 321,384 IOPS (1,316.39MB/s) at QD32 but the rate of increase slows from QD8 onwards.