what SSD do you have, and what HDD are you coming from?
Also, did you do a fresh install, or a clone of the OS?
Don't you mean Seagate 600? I'm not even sure if you could get a 225 working in a current-day PC, but it's definitely not an SSD.
Anyway, find something you do that's normally drive-intensive, then rejoice 🙂.
Also, make sure your partition is aligned (AS-SSD is a vendor-independent program that tells you, along with its ability to benchmark), as that will probably have as much of an affect as TRIM, if not more (Seagate 600s have ~12% factory OP, which combined with the LAMD controller, make them great no-TRIM drives). Alignment was a much more minor performance killer a few years ago, but with basically everyone running new OSes that do it right from the start, I think they're not optimizing for 512b/misalignment, anymore.
My Seagate 600 ST240 is about 223GB and is getting 520/470 read writes.
Also, make sure your partition is aligned (AS-SSD is a vendor-independent program that tells you, along with its ability to benchmark), as that will probably have as much of an affect as TRIM, if not more (Seagate 600s have ~12% factory OP, which combined with the LAMD controller, make them great no-TRIM drives). Alignment was a much more minor performance killer a few years ago, but with basically everyone running new OSes that do it right from the start, I think they're not optimizing for 512b/misalignment, anymore.
How does it compare to your old drive?