The CPU is not socketed. It can not be changed.
There is a little, what appears to be, temperature sensor on the front of the hard drive. If you change your hard drive, you'll have to remove this and stick it on the new hard drive. It's just stuck on with some double sided tape.
Also confirmed - upgrade from 1GB to 2GB and I now get 256MB VRAM.
3DMark2006 v1.10 scores:
Mac Mini 2.0ghz 1GB RAM - Single 1GB DIMM (128MB VRAM)
3DMarks : 1502
SM2.0 : 525
HDR/SM3.0 Score : 551
CPU Score : 1772
Mac Mini 2.0ghz 4GB RAM - 2x2GB DIMMS (256MB VRAM)
3DMarks : 1932
SM2.0 : 691
HDR/SM3.0 Score : 712
CPU Score : 1816
There is a little, what appears to be, temperature sensor on the front of the hard drive. If you change your hard drive, you'll have to remove this and stick it on the new hard drive. It's just stuck on with some double sided tape.
Also confirmed - upgrade from 1GB to 2GB and I now get 256MB VRAM.
3DMark2006 v1.10 scores:
Mac Mini 2.0ghz 1GB RAM - Single 1GB DIMM (128MB VRAM)
3DMarks : 1502
SM2.0 : 525
HDR/SM3.0 Score : 551
CPU Score : 1772
Mac Mini 2.0ghz 4GB RAM - 2x2GB DIMMS (256MB VRAM)
3DMarks : 1932
SM2.0 : 691
HDR/SM3.0 Score : 712
CPU Score : 1816