Why am I getting less than 200MB write speed an a SSD XPG S40G while plotting 😒?

[2020movievault]

Please I need help this is driving me crazy.
I have A Dell T5610 with 64 MB RAM / 2 x Intel V2650 32 Thread / & 1 x 4 TB XPG S40G
Based on my calculations I should be able to plot around 16 plots parallel.
I can't even complete 12 it seems something it wrong with my set up of the ssd it seems because I can't get to seem to go over 200MB write speeds while plotting. The SSD crashed twice on me as the plots (12 in parallel) reached 34% the first time and 27% the second time and I can't figure out what it is that is causing such low write speeds.

I downloaded AS SSD Benchmark and ran a speed test on the drive and it shows the following.

Task Manager Screen shot

Any help will be greatly appreciated.