Here are the technical specs from AMD.
Model Number, Core Frequency & Price: X4 620 / 2.6GHz / $99
Model Number, Core Frequency & Price: X4 630 / 2.8GHz / $122 )
Tray OPNs: TRAY OPN# ADX620WFK42GI / ADX630WFK42GI
Processor in a Box OPNs: PIB OPN# ADX620WFGIBOX / ADX630WFGIBOX
L1 Cache Sizes: 64K of L1 instruction and 64K of L1 data cache per core (512KB total L1 per processor)
L2 Cache Sizes: 512KB of L2 data cache per core (2MB total L2 per processor)
Memory Controller Type: Integrated 128-bit wide memory controller *
Memory Controller Speed: Up to 2.0GHz with Dual Dynamic Power Management
Types of Memory Supported: Unregistered DIMMs up to PC2-8500 (DDR2-1066MHz) -AND- PC3-10600 (DDR3-1333MHz)
HyperTransport 3.0 Specification: One 16-bit/16-bit link @ up to 4.0GHz full duplex (2.0GHz x2)
Total Processor-to-System Bandwidth: Up to 37.3GB/s total bandwidth [Up to 21.3 GB/s memory bandwidth (DDR3-1333) + 16.0GB/s (HT3)]
Up to 33.1GB/s total bandwidth [Up to 17.1 GB/s memory bandwidth (DDR2-1066) + 16.0GB/s (HT3)]
Packaging: Socket AM3 938-pin organic micro pin grid array (micro-PGA)
Fab location: GLOBALFOUNDARIES Fab 1 module 1 in Dresden, Germany (formerly AMD Fab 36)
Process Technology: 45-nanometer DSL SOI (silicon-on-insulator) technology
Approximate Die Size: 169 mm2
Approximate Transistor count: ~300 million
Max Temp: 71o Celsius
Nominal Voltage: 0.925-1.425V
Max TDP: 95 Watts
Source: http://www.amdzone.com/index.php/reviews/cpus/12027-athlon-ii-x4-620
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