windows 7 - My SSD drives have a very slow write speed (800MB read / 5MB write!)

I've done a lot of digging to try and figure out why I am experiencing slow write speeds to my SSD drives. They’re model number is: PNY XLR8 SSD9SC240GMDA-RB 2.5" 240GB SATA III Internal Solid State Drive (SSD).

They are running on SATA ports 1 and 2 TRIM is enabled. I can’t get SMART data because they’re set up in a RAID 0 (though the problem still persists with individual drives).

1. I've run defrag using O&O's offline defrag tool.


2. I took my SSD drives off of RAID 0 and tested them individually with the same results.



3. My external USB hard drive is faster at writing than my SSDs!


4. I've made sure that my drive is set to AHCI (before, it was RAID 0)

I am using Windows 7 and these drives were running just fine before. The funny thing is that now the problem is occurring with both drives.

FWIW, I upgraded to Windows 10 a few weeks ago and started noticing the slowness. Thinking it was Windows 10 that was the cause, I downgraded back to Windows 7 Ultimate.

Here's the AS SSD result (clearly not normal):