SanDisk Extreme® II SSD

Id like to purchase this ssd drive to update my pc as i will be installing Windows 7 x64 bit fresh my older 2009 pc

. it’s a Dell Inspiron 530 which only had a 3 Mb/s controller(i think SATA 2???).

  i know this ssd is tagged at 6mb/s so is it backwards compatible with 3mb/s? Will this still work?

i want to install the OS on the ssd and use a regular hdd for my drive. i don’t think my bios has support for trim but still want to get faster not times.

please help.

my motherboard is a Dell / Foxconn  G679R G33 chipset board (Intel LGA775) if that matters.

i know the Dell site shows an SSD drive as  Possible upgrade part for the Inspiron 530 as an accessory part on their website but not sure what the max specs this PC can take.

thanks for the help.

salsaguy