Today I installed an Intel X25-M SATA SSD (80GB) in my Mac Pro.
Model Name: Mac Pro
Model Identifier: MacPro3,1
Processor Name: Quad-Core Intel Xeon
Processor Speed: 2.8 GHz
Number Of Processors: 2
Total Number Of Cores: 8
L2 Cache (per processor): 12 MB
Memory: 6 GB
Bus Speed: 1.6 GHz
Boot ROM Version: MP31.006C.B05
SMC Version (system): 1.25f4
I then used Carbon Copy Cloner to clone my boot drive to the new SSD. This worked fine.
When I select the new SSD in System Preferences > Startup Disk and restart I hear the chime and then the system will power down.
Holding down ALT (Option) allows me to select my original boot drive.
I have used Disk Utility to repair the disk but with no luck.