AS SSD is a great free tool designed just for benching Solid State Drives. It performs an array of sequential read and write tests, as well as random read and write tests with sequential access times over a portion of the drive. AS SSD includes a sub suite of benchmarks with various file pattern algorithms but this is difficult in trying to judge accurate performance figures.
The read and write scores of 2810 and 2714 from the 980 Pro Heatsink version are lower than the scores from the standard 980 Pro. The Heatsink-equipped drive has different firmware installed than the standard model which may account for the lower scores of the later drive.