Slow SSD speed after 4 months of use - Kingston A400 240GB

Jan 28, 2019
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Hi! I've recently noticed my SSD (Kingston A400 240GB) speed is going down the gutter. I used the CrystaldiskMark benchmark and I get around 370 MB/s on read speed. Searching around for benchmarks for the same exact SSD (240GB), I've seen read speeds greater than 500MB/s. For comparison, I also bought another Kingston A400 a couple of weeks ago, this time with 480GB space, and on the same benchmark I get around 550 MB/s. My motherboard is a MSI X370 Gaming Plus. SSD is 50% full.

Things I've tried:
- Made sure TRIM is enabled
- Disabled Windows auto disk optimization and defrag
-Made sure AHCI is enabled in BIOS
-SSD and Bios are both updated to the latest firmware
-Made sure SSD is connected to a Sata III port and tried a different Sata III port
-Made sure I was using a Sata III cable and tried a different Sata III cable
-Used Kingston Disk software to make sure there were no disk errors and to check disk integrity

To be honest, I'm out of ideas, any help would be greatly appreciated.