Hi

I have a Macpro Early 2008 with the following specs :
Processor : 2x2.8 GHz Quad Core Intel Xeon
Memory: 2GB 800 MHz DDR2 FB-DIMM
S/N: YM80926LXYK
OSX 10.9.1

Current Problem : Always rebooting by itself
Can you repair and roughly how much is the cost?

Thanks