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-
You sure it's socket 775? I double checked, and intel never made socket 775 core solos. The entire yonah line were the mobile variants only.
it is not 775. it's an M(mobile)479. the best you can do is an intel C2D t7600 (2.33ghz) sl9sd (fcpga). available on ebay for about $250.
Thanks everyone that responded. I have decided that is probably cheaper to purchase the latest model 2nd Hand if possible.