The 500GB are likely quite old and slow.
What I would do is this:
Using Intel SATA Ports Numbered 1,2,3,4 in this example (might be 0, 1, 2, 3)
a) Connect optical to SATA Port 4 if you have one.
b) Connect 256 or 128 GB SSD to SATA port 1 with it being the only storage device in system.
c) Install OS
d) Do all windows updates and driver installs
e) Connect 1 TB to SATA Port 3
g) Install all games / programs whatever ya like, partitioned however you like
h) Disconnect SATA cable from SSD
i) Connect 500GB drive to SATA port 2
j) Repeat c and d on 500 GB drive...... see * below
Now you can boot off SSD, use programs and games off 1 TB drive and boot off 500Gb if SSD dies.
* at this point you can reinstall ya programs and games again over themselves so to make necessary registry entries and run off either boot.