• Product Collection Legacy Intel® Xeon® Processors
• Code Name Products formerly Harpertown
• Vertical Segment Server
• Processor Number E5420
• Status Discontinued
• Launch Date Q4’07
• Expected Discontinuance Q4’2010
• Lithography 45 nm
• Recommended Customer Price$347.00

• Total Cores 4
• Processor Base Frequency 2.50 GHz
• Cache 12 MB L2 Cache
• Bus Speed 1333 MHz
• FSB Parity Yes
• TDP 80 W
• VID Voltage Range 0.850V-1.3500V

• Embedded Options Available No
• Datasheet View now

• Sockets Supported LGA771
• T_CASE 67°C
• Package Size 37.5mm x 37.5mm
• Processing Die Size 214 mm²
• # of Processing Die Transistors 820 million

• Intel® Turbo Boost Technology ^‡ No
• Intel® Hyper-Threading Technology ^‡ No
• Intel® Virtualization Technology (VT-x) ^‡ Yes
• Intel® VT-x with Extended Page Tables (EPT) ^‡ No
• Intel® 64 ^‡ Yes
• Instruction Set 64-bit
• Idle States Yes
• Enhanced Intel SpeedStep® Technology Yes
• Intel® Demand Based Switching Yes
• Thermal Monitoring Technologies Yes

• Intel® Trusted Execution Technology ^‡ No
• Execute Disable Bit ^‡ Yes

sumber : https://ark.intel.com/content/www/us/en/ark/products/33927/intel-xeon-processor-e5420-12m-cache-2-50-ghz-1333-mhz-fsb.html