oppening system booting very slowCan you tell us what "very slow" boot is?
20 seconds boot might seem slow for some folks, but 2 minutes would definitely be slow.
Does your system respond OK after it finishes booting?
How do you get 9GB of RAM?
Trim (or no trim) would not affect boot time in any way.
Ok but if you put the same software on that you had, be prepared for the issue to come back. Formatting will fix all kinds of issues but it won't tell you what the issue was...
So what did you put on the drive after the format?
Upgrade to 10.10.5 which enables third party TRIM support.
sudo trimforce enable
That should help. And the obvious is checking what Login Items are present, and running a permissions repair from Disk Utility.