AMD Phenom II X2 555 BE vs AMD Phenom II X4 955 (95W)

Table of Contents

Physical Specifications

Socket AMD Socket AM3 AMD Socket AM3
Process size 45 nm 45 nm
Transistors 758 million 758 million
Die size 258 mm² 258 mm²
Package µPGA µPGA


Frequency 3.2 GHz 3.2 GHz
Turbo clock
Base clock 200 MHz 200 MHz
Multiplier 16.0x 16.0x
Multiplier unlocked Yes No
Voltage 1.4 V 1.4 V
TDP 80 W 95 W

Architecture Details

Vertical Segment Desktop Desktop
Production status End-of-life End-of-life
Release date Jan 25th, 2010 Apr 1st, 2009
Codename Callisto Deneb
Generation Phenom II X2 Phenom II X4
Memory support DDR3 Dual-channel DDR3 Dual-channel
ECC memory No No
PCI Express Gen 2 Gen 2


Total Cores 2 4
Total Threads 2 4
SMP # CPUs 1 1
Integrated graphics


Cache L1 128K (per core) 128K (per core)
Cache L2 512K (per core) 512K (per core)
Cache L3 6MB (shared) 6MB (shared)


Notes This processor comes with an unlocked base clock multiplier, allowing users to set the multiplier value higher than shipped value, to facilitate better overclocking. It is branded under the Black Edition label.

Features & Technologies

3DNow! Yes Yes
AMD-V Yes Yes
AMD64 Yes Yes
MMX Yes Yes
NX bit Yes Yes
SSE Yes Yes
SSE2 Yes Yes
SSE3 Yes Yes
SSE4A Yes Yes


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