AMD

AMD Opteron 840

AMD processor specifications and benchmark scores

1
Cores
1
Threads
β€”
GHz Boost
85W
TDP

AMD Opteron 840 Specifications

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Opteron 840 Core Configuration

Processing cores and threading

The AMD Opteron 840 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
⏱️

Opteron 840 Clock Speeds

Base and boost frequencies

Clock speed is a critical factor in Opteron 840 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 Opteron 840 by AMD can dynamically adjust its frequency based on workload and thermal headroom.

Base Clock
1400 GHz
Boost Clock
N/A
Multiplier
7x
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AMD's Opteron 840 Cache Hierarchy

L1, L2, L3 cache sizes

Cache memory is ultra-fast storage built directly into the Opteron 840 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 Opteron 840'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 Opteron 840 is built on AMD's 130 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 Opteron 840 incorporate advanced branch prediction and out-of-order execution for optimal performance.

Architecture
K8
Codename
SledgeHammer
Process Node
130 nm
Transistors
106 million
Die Size
193 mmΒ²
Generation
Opteron (SledgeHammer (B3))
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K8 Instruction Set Features

Supported CPU instructions and extensions

The Opteron 840 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
AMD64
AMD-V
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Opteron 840 Power & Thermal

TDP and power specifications

The AMD Opteron 840 has a TDP (Thermal Design Power) of 85W, 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
85W
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AMD Socket 940 Platform & Socket

Compatibility information

The Opteron 840 uses the AMD Socket 940 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 940
PCIe
Gen 2
Package
Β΅PGA
DDR5

AMD Socket 940 Memory Support

RAM compatibility and speeds

Memory support specifications for the Opteron 840 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 Opteron 840 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 Bus
Dual-channel
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Opteron 840 Product Information

Release and pricing details

The AMD Opteron 840 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 Opteron 840 by AMD offers a specific balance of performance, features, and cost within AMD's product lineup.

Manufacturer
AMD
Release Date
Jun 2003
Market
Server/Workstation
Status
End-of-life
Part Number
OSA840CCO5AI

Opteron 840 Benchmark Scores

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No benchmark data available for this CPU.

About AMD Opteron 840

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The AMD Opteron 840 stands as an early entry in AMD's enterprise server lineup, designed primarily for single-socket workhorse systems. With a 1400 MHz base clock and a single-core, single-thread architecture, real-world performance expectations should be tempered by its age: it excels in basic server tasks like file serving, lightweight database operations, and legacy application hosting but struggles under simultaneous multi-threaded workloads or modern software demands. Its 130 nm manufacturing process and 85W TDP reflect an era before power efficiency became a priority, making it suitable for environments where simplicity and reliability outweigh cutting-edge speed. While no formal benchmarks exist, anecdotal reports suggest it handles around 2-4 concurrent users efficiently in entry-level server roles, though its lack of modern instruction sets limits future-proofing.

Productivity benchmarks for the AMD Opteron 840 (AMD) reveal its niche: single-threaded applications such as older enterprise software, basic web hosting, or legacy financial systems perform adequately, but multi-threaded workloads like virtualization or high-throughput databases will see significant bottlenecks. Compared to contemporary dual-core or multi-core processors, the Opteron 840’s single-core design places it firmly in the β€œlegacy” category, offering just enough power for small businesses or educational institutions running outdated software stacks. Cost-effectiveness depends heavily on use case; for new deployments, modern low-power CPUs outperform it at similar or lower prices, but for maintaining legacy systems, its low acquisition cost (often under $20 used) and compatibility with older software may justify its use. However, operating costs including power consumption and potential cooling needs should be factored into long-term budgeting.

Motherboard support for the AMD Opteron 840 (AMD) centers on Socket 940 platforms, which were common in early 2000s enterprise hardware. Notable considerations include:

  • Chipset compatibility is limited to AMD’s initial Opteron-era chipsets like the AMD-8000 series, which lack modern features like PCIe 4.0 or NVMe support.
  • Registered DDR SDRAM is required, with most boards supporting DDR400 ECC memory a limitation for systems needing higher bandwidth or larger capacities.
  • Expansion options are constrained to PCI/PCI-X slots, ruling out compatibility with newer GPUs, NVMe drives, or high-speed networking cards.
  • BIOS updates for the Opteron 840 (AMD) are rare post-2010, meaning security patches and hardware support are frozen in time, increasing vulnerability risks.

Ultimately, the AMD Opteron 840 remains a relic of early 64-bit server computing, valuable only in specific legacy scenarios where its compatibility with older software and hardware outweighs its performance and efficiency drawbacks.

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The Intel Equivalent of Opteron 840

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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