Can upgrade to Quad Core from a 1.5Ghz Core Solo Mac Mini




Fortunately it is not soldered in - It is socketed.
 
Then you need to find out if it's in a socket 775 or a mobile variant.

If it's the actual Core Duo (not Core 2 Duo), then it's the mobile variant, core duo CPUs were never released for desktops. If thats the case it might be a little difficult to get an upgrade.
 
Thanks. I have checked and it is a socket 775 device and it has 1.5GHz Intel Core Solo markings.

Model Name: Mac mini
Model Identifier: Macmini1,1
Processor Name: Intel Core Solo
Processor Speed: 1.5 GHz
Number Of Processors: 1
Total Number Of Cores: 1
L2 Cache: 2 MB
Memory: 2 GB
Bus Speed: 667 MHz
Boot ROM Version: MM11.0055.B08
SMC Version (system): 1.3f4
Serial Number (system): YM6084KFU35
Hardware UUID: 00000000-0000-