AMD Athlon II X4 651K vs AMD Phenom II X4 955

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CPU comparison with benchmarks

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CPU lineage

AMD Athlon II X4 651K or AMD Athlon II X4 651K – which processor offers superior performance? In this comparison, we examine disparities and assess which of these two CPUs outperforms the other. We delve into technical specifications and benchmark outcomes.
The AMD Athlon II X4 651K features 4 processor cores and has the capability to manage 4 threads concurrently.
It was released in Q4/2011 and belongs to the 2 generation of the AMD Athlon II series.
To use the AMD Athlon II X4 651K, you'll need a motherboard with a FM1 socket.
The AMD Phenom II X4 955 features 4 processor cores and has the capability to manage 4 threads concurrently.
It was released in Q2/2009 and belongs to the 4 generation of the AMD Phenom II series.
To use the AMD Phenom II X4 955, you'll need a motherboard with a AM3 socket.
Desktop / Server Segment Desktop / Server
AMD Athlon II X4 651K Name AMD Phenom II X4 955
AMD Athlon II Family AMD Phenom II
2 Generation 4
AMD Athlon II X4 (Llano) Group AMD Phenom II - 800/900
 
 

CPU Cores and Base Frequency

The AMD Athlon II X4 651K has 4 CPU cores and can calculate 4 threads in parallel.
The clock frequency of the AMD Athlon II X4 651K is 3.0 GHz
The AMD Phenom II X4 955 has 4 CPU cores and can calculate 4 threads in parallel.
The clock frequency of the AMD Phenom II X4 955 is 3.2 GHz
normal Core architecture normal
3.0 GHz Frequency 3.2 GHz
4 Threads 4
Yes Overclocking Yes
No Hyperthreading No
4 CPU Cores 4
4x Cores 4x
 
 

Internal Graphics

The AMD Athlon II X4 651K does not have integrated graphics.
The AMD Phenom II X4 955 does not have integrated graphics.
-- GPU frequency --
-- Release date --
-- Direct X --
GPU name
-- Technology --
-- Max. displays --
-- Shaders --
0 bytes Max. GPU Memory 0 bytes
-- Execution units --
-- Generation --
-- GPU (Turbo) --
 
 

Artificial Intelligence and Machine Learning

-- AI specifications --
-- AI hardware --
 
 

Hardware codec support

A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.
-- AVC --
-- VC-1 --
-- VP9 --
-- h265 / HEVC (10 bit) --
-- h264 --
-- VP8 --
-- h265 / HEVC (8 bit) --
-- JPEG --
-- AV1 --
 
 

Memory & PCIe

The processor supports a maximum memory capacity of 16.0 GB distributed across 2 memory channels. It offers a peak memory bandwidth of 21.3 GB/s. Both the type and quantity of memory can have a substantial impact on the overall system performance.
2 Memory channels 2
16.0 GB Max. Memory 0 bytes
pci PCIe pci
No AES-NI No
No ECC No
21.3 GB/s Bandwidth --
DDR3-1333 Memory type DDR3-1333, DDR2-1066
 
 

Thermal Management

The processor has a thermal design power (TDP) of 100 W watts.
TDP indicates the cooling solution needed to effectively manage the processor's heat. It generally provides an approximate indication of the actual power consumption of the CPU itself.
The processor has a thermal design power (TDP) of 125 W watts.
-- Tjunction max --
100 W TDP (PL1 / PBP) 125 W
 
 

Technical details

The AMD Athlon II X4 651K is manufactured using a 32 nm process.
A smaller manufacturing process indicates a more contemporary and energy-efficient CPU.
A substantial cache can significantly enhance the processor's performance, particularly in scenarios like gaming.
The AMD Phenom II X4 955 is manufactured using a 45 nm process.
In total, this processor boasts a generous 6.0 MB cache.
Q4/2011 Release date Q2/2009
-- Part Number --
4.0 MB L2-Cache 0 bytes
AMD-V Virtualization AMD-V
SSE3, SSE4a, MMX, 3DNow! ISA extensions SSE3, SSE4a
-- Chip design --
Llano Architecture Deneb (K10)
32 nm Technology 45 nm
FM1 Socket AM3
Windows 10, Linux Operating systems Windows 10, Linux
-- Release price --
Technical data sheet Documents Technical data sheet
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
0 bytes L3-Cache 6.0 MB