Not sure if this is OS, SSD or controller related.

[Curious Pineapple]

Recently my game SSD (a Sunbow X3) has had weird writing issues. It starts off fine and slows down with a response time into tens of seconds! The 4k random reads/writes were utter bollocks too in the single digits. Same kind of slow random numbers on the WD green boot drive but it sustained sequential reads and writes just fine.

 

I recently switched from the onboard SATA2 controller to a PCI-e SATA3 controller which made initial writes faster but it still dropped to stupid slow. 4k reads/writes still crap.

 

Today I swapped my WD Green 240GB boot drive for another Sunbow x3 480GB (used Clonezilla to do an exact copy) and now it performs as it should.

 

Just curious if anyone knows what may have been causing it?