AMD

AMD Athlon 64 FX-55

AMD processor specifications and benchmark scores

1
Cores
1
Threads
β€”
GHz Boost
104W
TDP
πŸ–₯️Integrated GPU

AMD Athlon 64 FX-55 Specifications

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Athlon 64 FX-55 Core Configuration

Processing cores and threading

The AMD Athlon 64 FX-55 features 1 physical cores and 1 threads, which directly impacts multi-threaded performance in CPU benchmarks. More cores allow the processor to handle parallel workloads efficiently, improving performance in video editing, 3D rendering, and multitasking scenarios. Thread count determines how many simultaneous tasks the CPU can process, with higher thread counts benefiting productivity applications and content creation workflows.

Cores
1
Threads
1
SMP CPUs
1
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Athlon 64 FX-55 Clock Speeds

Base and boost frequencies

Clock speed is a critical factor in Athlon 64 FX-55 benchmark performance, measured in GHz. The base clock represents the guaranteed operating frequency, while the boost clock indicates maximum single-core performance under optimal conditions. Higher clock speeds translate to faster single-threaded performance, which is essential for gaming and applications that don't fully utilize multiple cores. The Athlon 64 FX-55 by AMD can dynamically adjust its frequency based on workload and thermal headroom.

Base Clock
2.6 GHz
Boost Clock
N/A
Multiplier
13x
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AMD's Athlon 64 FX-55 Cache Hierarchy

L1, L2, L3 cache sizes

Cache memory is ultra-fast storage built directly into the Athlon 64 FX-55 processor die. L1 cache provides the fastest access for frequently used data, while L2 and L3 caches offer progressively larger storage with slightly higher latency. Larger cache sizes significantly improve CPU benchmark scores by reducing memory access times. The Athlon 64 FX-55's cache configuration is optimized for both gaming performance and productivity workloads, minimizing data fetch delays during intensive computations.

L1 Cache
128 KB
L2 Cache
1 MB
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K8 Architecture & Process

Manufacturing and design details

The AMD Athlon 64 FX-55 is built on AMD's 90 nm manufacturing process, which determines power efficiency and thermal characteristics. Smaller process nodes allow for more transistors in the same space, enabling higher performance per watt. The architecture defines how the processor handles instructions and manages data flow, directly impacting benchmark results across different workload types. Modern CPU architectures like the one in Athlon 64 FX-55 incorporate advanced branch prediction and out-of-order execution for optimal performance.

Architecture
K8
Codename
San Diego
Process Node
90 nm
Transistors
114 million
Die Size
115 mmΒ²
Generation
Athlon 64 FX (San Diego)
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K8 Instruction Set Features

Supported CPU instructions and extensions

The Athlon 64 FX-55 by AMD supports various instruction set extensions that enable optimized performance for specific workloads. SIMD instructions like SSE and AVX accelerate multimedia, scientific computing, and AI workloads by processing multiple data points simultaneously. Features like AES-NI provide hardware-accelerated encryption, while AVX-512 (if supported) enables advanced vector processing for data centers and high-performance computing. These instruction sets are critical for software compatibility and performance in modern applications.

MMX
SSE
SSE2
SSE3
AMD64
AMD-V
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Athlon 64 FX-55 Power & Thermal

TDP and power specifications

The AMD Athlon 64 FX-55 has a TDP (Thermal Design Power) of 104W, indicating the cooling solution required for sustained operation. TDP affects both system power consumption and the type of cooler needed. Lower TDP processors are ideal for compact builds and laptops, while higher TDP chips typically offer better sustained performance in demanding CPU benchmarks. Understanding power requirements helps ensure your system can deliver consistent performance without thermal throttling.

TDP
104W
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AMD Socket 939 Platform & Socket

Compatibility information

The Athlon 64 FX-55 uses the AMD Socket 939 socket, which determines motherboard compatibility. Choosing the right platform is essential for building a system around this processor. The socket type also influences available features like PCIe lanes, memory support, and upgrade paths. When comparing CPU benchmarks, ensure you're looking at processors compatible with your existing or planned motherboard to make informed purchasing decisions.

Socket
AMD Socket 939
Chipsets
NVIDIA nForce 3, nForce 4, ATi Xpress 200, Xpress 200P, Xpress 1100, Xpress 1150, ULi M1689, M1695, M1697, VIA K8N890, K8M890, K8T800, K8T800 Pro, K8T890, K8T900
Package
Β΅PGA
DDR5

AMD Socket 939 Memory Support

RAM compatibility and speeds

Memory support specifications for the Athlon 64 FX-55 define which RAM types and speeds are compatible. Faster memory can significantly improve CPU benchmark performance, especially in memory-intensive applications and gaming. The memory controller integrated into the Athlon 64 FX-55 determines maximum supported speeds and channels. Dual-channel or quad-channel memory configurations can double or quadruple memory bandwidth, providing noticeable performance gains in content creation and scientific workloads.

Memory Type
DDR1
Memory Bus
Dual-channel
Memory Bandwidth
6400 MB/s
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AMD's Athlon 64 FX-55 Integrated Graphics

Built-in GPU specifications

The AMD Athlon 64 FX-55 includes integrated graphics, eliminating the need for a dedicated GPU in basic computing scenarios. Integrated graphics are ideal for office productivity, video playback, and light gaming. While not designed for demanding GPU benchmarks, the iGPU in the Athlon 64 FX-55 provides hardware video encoding and decoding capabilities. This makes the processor suitable for compact builds, HTPCs, and systems where power efficiency is prioritized over gaming performance.

iGPU
On certain motherboards (Chipset feature)
Graphics Model
On certain motherboards (Chipset feature)
πŸ“¦

Athlon 64 FX-55 Product Information

Release and pricing details

The AMD Athlon 64 FX-55 is manufactured by AMD and represents their commitment to delivering competitive CPU performance. Understanding the release date and pricing helps contextualize benchmark comparisons with other processors from the same generation. Launch pricing provides a baseline for evaluating value, though street prices often differ. Whether you're building a new system or upgrading, the Athlon 64 FX-55 by AMD offers a specific balance of performance, features, and cost within AMD's product lineup.

Manufacturer
AMD
Release Date
Oct 2004
Launch Price
$827
Market
Desktop
Status
End-of-life
Part Number
ADAFX55DAA5BN
Bundled Cooler
Yes

Athlon 64 FX-55 Benchmark Scores

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No benchmark data available for this CPU.

About AMD Athlon 64 FX-55

The AMD Athlon 64 FX-55 was the undisputed single-threaded champion for its time, a halo product built for enthusiasts who demanded the absolute peak in gaming and application performance. With its 2.6 GHz clock speed on the efficient 90nm San Diego core, this processor delivered exceptional responsiveness for day-to-day tasks in the Windows XP era, where its single-core design was perfectly matched to contemporary software. Its 1MB of L2 cache and integrated memory controller on the Socket 939 platform provided a significant latency advantage, making general system navigation and productivity applications feel incredibly snappy. The Athlon 64 FX-55 was engineered to dominate gaming benchmarks, offering the highest frame rates in titles like Half-Life 2 and Doom 3 where raw CPU speed was paramount. While its 104W TDP required robust cooling, it was a price enthusiasts were willing to pay for the top-tier experience. This CPU's value proposition was never about affordability; launched at $827, it was a prestige component for building a no-compromise system. Owning the FX-55 meant having the fastest desktop processor money could buy, a badge of honor for PC builders.

Motherboard support for this legendary chip was centered on the high-end NVIDIA nForce4 and ATI Radeon XPRESS 200 chipsets for Socket 939, which offered features like SLI, SATA, and native Gigabit Ethernet to match the processor's premium status. The gaming capabilities of the Athlon 64 FX (San Diego) were its raison d'Γͺtre, consistently topping charts and providing the headroom needed for smooth gameplay even when paired with the most powerful GPUs of the generation, such as the NVIDIA GeForce 6800 Ultra. In a multi-threaded world, the single-core Athlon 64 FX-55 would be severely limited, but in its prime, it represented the pinnacle of dedicated gaming hardware. Its release in late 2004 cemented AMD's performance leadership for that cycle, directly challenging Intel's Pentium 4 Extreme Edition. The legacy of the FX-55 is that of a focused performance king, a processor whose entire architecture was optimized for the workloads of its day. For those who experienced it, the AMD Athlon 64 FX-55 remains an iconic symbol of a time when sheer clock speed and architectural efficiency ruled the desktop.

The Intel Equivalent of Athlon 64 FX-55

Looking for a similar processor from Intel? The Intel Core i5-750 offers comparable performance and features in the Intel lineup.

Intel Core i5-750

Intel β€’ 4 Cores

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