AMD Athlon II X4 651 vs AMD Phenom II X4 955 (125W)

Table of Contents

Physical Specifications

Socket AMD Socket FM1 AMD Socket AM3
Process size 32 nm 45 nm
Transistors 1,178 million 758 million
Die size 228 mm² 258 mm²
Package µPGA µPGA

Performance

Frequency 3 GHz 3.2 GHz
Turbo clock
Base clock 100 MHz 200 MHz
Multiplier 30.0x 16.0x
Multiplier unlocked No No
Voltage 1.4125 V 1.4 V
TDP 100 W 125 W

Architecture Details

Vertical Segment Desktop Desktop
Production status End-of-life End-of-life
Release date Nov 14th, 2011 Apr 1st, 2009
Codename Llano Deneb
Generation Athlon II X4 Phenom II X4
Part AD651XWNZ43GXAD651XWNGXBOX HDX955FBK4DGIHDX955FBK4DGMHDX955FBGMBOX
Memory support DDR3 Dual-channel DDR3 Dual-channel
ECC memory No No
PCI Express Gen 2

Cores

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

Cache

Cache L1 128K (per core) 128K (per core)
Cache L2 1MB (per core) 512K (per core)
Cache L3 6MB (shared)

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

Compare

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