I had Acer Aspire 5749 with Intel 2nd Gen. Core i3 2330M and i want to replace my HDD with an SSD. The crystal Disk Info says that HDD transfer rate is SATA/300 or SATA 3 Gbps where as HWinfo64 Says that my notebook's motherboard has two SATA ports which are SATA 6 Gbps.
I knon that if you use a SATA 3 Gbps HDD on SATA 6 Gbps port than speed will decrease to 3 Gbps according to device so it is possible that my HDD is 3 Gbps that is why Crystal Disk Info is showing that.
What you think, is it has SATA 3 Gbps or SATA 6 Gbps ?
Doesn't matter what it has Hard Drives are slow even SSDs are slow (+-500MBs) 3 GBs will be fine for the next few years.
with that said your system is most probably 6GBs and your HDD is limiting it to 3GBS
Just make sure you get an SSD that also supports 3GBs just to be safe