Okay, so I've had my iMac for about 4 years, it has 4GB of RAM(originally 2), a 2.66GHz processor and 256MB of VRAM. What I want to know is can I upgrade my RAM any higher and can I upgrade my graphics card or processor. I don't really care to much about the RAM or processor what I want is a better graphics card. I've heard that you can upgrade the RAM up to 6GB but I'm not sure.
Model Name: iMac
Model Identifier: iMac8,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.66 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: IM81.00C1.B00
SMC Version (system): 1.29f1
Serial Number (system): QP8410UQZE3
Hardware UUID: 6D7B02D5-D447-53FA-989D-B413A814AE70
Model Name: iMac
Model Identifier: iMac8,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.66 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: IM81.00C1.B00
SMC Version (system): 1.29f1
Serial Number (system): QP8410UQZE3
Hardware UUID: 6D7B02D5-D447-53FA-989D-B413A814AE70