Serial Number Location
On the bottom of your iMac stand, you’ll find a label with the serial number printed on it.
To confirm the configuration from the Apple menu, choose About This Mac. The Processor listing will show the speed of the processor followed by the processor type.
The iMac
•2.4 GHz Intel Core 2 Duo processor or 2.8 GHz Core 2 Extreme
•ATI Radeon HD 2600 Pro with 256 MB GDRR3 VRAM
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•320 GB hard disk (for the 2.0 GHz) or: 500 GB (for the 2.8 GHz) with CTO options of 500 GB, 750 GB or 1TB.
•1 GB (1x 1GB) 667 MHz with support up to 4.0 GB system memory
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•New Apple keyboard, wired (CTO option: new Apple Wireless Keyboard)
iMac