Model Detail - iMac 27 inch 3.1 GHz Core i5-2400 (Mid-2011)

The iMac "Core i5" 3.1GHz 27" Screen Aluminum model (Mid-2011) is is powered by a Quad Core 3.1GHz Intel "Core i5" I5-2400 Sandy Bridge processor with a 256k level 2 cache per core and a 6MB level 3 cache and 5 GT/s DMI "Direct Media Interface" between the processor and chipset.
The Base configuration of this model has 4GB of RAM DDR3-1333 (PC3-10600) SDRAM, a 7200 RPM 1TB hard drive, a slot-loading DVD±R DL "SuperDrive" plus AMD Radeon HD 6970M graphics processor running 1GB of GDDR5 RAM.
Integrated "FaceTime HD" camera mounted above the 27" gloss 2560x1440 16:9 LED "IPS" display. Ports and connectivity come via 4 USB 2.0 ports, 1 Firewire 800 port, AirPort Extreme, 1 Gigabit Ethernet, 1 SDXC card slot plus a pair of 10Gps, 2560x1600 display capable Thunderbolt ports.

Download the manual from here.

Learn how to install Extra RAM here.

MAIN SPECS
Processor Speed 3.1GHz
First Build Date 05/03/2011
Last Build Date 10/23/2012
Built-in Display 27
Model Identifier iMac12,2
Apple Order Number MC814LL/A
Apple Model Number A1312 (EMC 2429)
Form Factor iMac (Late 2009)
Apple Subfamily Mid-2011
EXPAND / UPGRADE
Standard RAM
Maximum RAM
32GB
RAM Slots4
RAM SpecsPC3-10600 DDR3-1333
RAM Speed1333MHz
Standard Storage Drive
1 TB (7200 RPM)
Maximum Storage Drive
1.5TB
Storage Drive Interface Serial ATA (SATA) (6GB/s)
SYSTEM
Processor Type Core i5 (I5-2400)
Processors / Cores 1 (4 Cores)
Geekbench Rating 8357/8878
Turbo Boost Speed N/A
Custom Speeds 3.4GHz (Core i7)
Architecture 64-Bit
Processor Upgradeable LGA 1155 (Socket H2)
FPU Integrated
Integrated System RAM None
Standard RAM 4GB
Maximum RAM 32GB
RAM Slots 4
RAM Specs PC3-10600 DDR3-1333
RAM Speed 1333MHz
System Bus Speed 5 GT/s
Cache Bus Speed 3.1GHz (Built-in)
ROM / Firmware Type EFI
EFI Architecture 64-Bit
L1 Cache 32k/32k
L2 / L3 Cache 256k (x 4), 6MB
VIDEO / GRAPHICS
Video Card Radeon HD 6970M
VRAM Type GDDR5
Standard VRAM 1GB
Maximum VRAM 2GB
Native Resolution 2560x1440
Multi Display Support Dual/ Mirroring (x2)
Multi Display Max Resolution 2560x1600
STORAGE
Standard Storage Drive 1 TB (7200 RPM)
Maximum Storage Drive 1.5TB
Storage Drive Interface Serial ATA (SATA) (6GB/s)
Optical Disk 8X DL
Floppy / Zip Drive None
Ports
AirPort 802.11a/b/g/n (450MBit)
Bluetooth 2.1+EDR
Video / Multi-IO 2 (Thunderbolt)
Thunderbolt Ports / Spec 2 (TB1/ 10Gb)
USB Ports / Spec 4 (2.0)
Firewire Ports / Spec 1 (800)
Ethernet (RJ-45) 10/100/1000Base-T
Modem (RJ-11) None
Headphone 1
Microphone 1 (Built-in)
Audio In 1
Audio Out 1
Keyboard Apple Wireless Keyboard
Mouse / Trackpad Magic Mouse/Trackpad
Expansion Slots SDXC SD Card
Expansion Bays None
LEGACY PORTS
SCSI None
S-Video Input None
S-Video Output None
Floppy None
ADB None
Serial None
Geoport None
OPERATING SYSTEM
Pre-Installed MacOS OSX 10.6.6 (10J4026)
Maximum MacOS Current
MacOS 9 Support None
Windows Support Boot/ Virtualization
Minimum Windows 7 (32-Bit)
Maximum Windows 7 (64-Bit)
POWER
Battery Type N/A
Battery Life N/A
Power Adapter None
PHYSICAL
Case Type All-in-One
Dimensions 20.4 x 25.6 x 8.15
Weight 30.5 lbs. (13.8 kg)
Original Price USD US$1999
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