INTEL

Intel Core 2 Quad Q8400S

Intel processor specifications and benchmark scores

4
Cores
4
Threads
GHz Boost
65W
TDP
🖥️Integrated GPU

Intel Core 2 Quad Q8400S Specifications

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Core 2 Quad Q8400S Core Configuration

Processing cores and threading

The Intel Core 2 Quad Q8400S features 4 physical cores and 4 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
4
Threads
4
SMP CPUs
1
⏱️

2 Quad Q8400S Clock Speeds

Base and boost frequencies

Clock speed is a critical factor in Core 2 Quad Q8400S 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 Core 2 Quad Q8400S by Intel can dynamically adjust its frequency based on workload and thermal headroom.

Base Clock
2.67 GHz
Boost Clock
N/A
Multiplier
8x
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Intel's Core 2 Quad Q8400S Cache Hierarchy

L1, L2, L3 cache sizes

Cache memory is ultra-fast storage built directly into the 2 Quad Q8400S 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 Core 2 Quad Q8400S's cache configuration is optimized for both gaming performance and productivity workloads, minimizing data fetch delays during intensive computations.

L1 Cache
64 KB (per core)
L2 Cache
4 MB (shared)
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Core 2 Architecture & Process

Manufacturing and design details

The Intel Core 2 Quad Q8400S is built on Intel's 45 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 2 Quad Q8400S incorporate advanced branch prediction and out-of-order execution for optimal performance.

Architecture
Core 2
Codename
Yorkfield
Process Node
45 nm
Foundry
Intel
Transistors
456 million
Die Size
2x 82 mm²
Generation
Core 2 Quad (Yorkfield)
🔢

Core 2 Instruction Set Features

Supported CPU instructions and extensions

The Core 2 Quad Q8400S by Intel 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
SSSE3
SSE4.1
Intel 64
VT-x
🔌

2 Quad Q8400S Power & Thermal

TDP and power specifications

The Intel Core 2 Quad Q8400S has a TDP (Thermal Design Power) of 65W, 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
65W
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Intel Socket 775 Platform & Socket

Compatibility information

The Core 2 Quad Q8400S uses the Intel Socket 775 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
Intel Socket 775
PCIe
Gen 2
Package
FC-LGA6
DDR5

Intel Socket 775 Memory Support

RAM compatibility and speeds

Memory support specifications for the 2 Quad Q8400S 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 Core 2 Quad Q8400S 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, DDR2, DDR3
Memory Bus
Dual-channel
🖥️

Intel's Core 2 Quad Q8400S Integrated Graphics

Built-in GPU specifications

The Intel Core 2 Quad Q8400S 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 2 Quad Q8400S 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)
📦

Core 2 Quad Q8400S Product Information

Release and pricing details

The Intel Core 2 Quad Q8400S is manufactured by Intel 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 Core 2 Quad Q8400S by Intel offers a specific balance of performance, features, and cost within Intel's product lineup.

Manufacturer
Intel
Release Date
Apr 2009
Market
Desktop
Status
End-of-life
Part Number
SLGT7

Core 2 Quad Q8400S Benchmark Scores

📊

No benchmark data available for this CPU.

About Intel Core 2 Quad Q8400S

  1. The Intel Core 2 Quad Q8400S, a 45nm Yorkfield-based CPU with 4 cores and 4 threads, delivers a balanced 2.67 GHz base clock, making it a reliable choice for multitasking and light to moderate workloads. Its 65W TDP ensures efficient power usage, ideal for systems prioritizing thermal management over raw performance. Unlike higher TDP variants, this 2.67 GHz model maintains stability without aggressive cooling, appealing to users seeking energy-conscious setups. The Q8400S leverages a 1333 MHz front-side bus to optimize memory subsystem interactions, supporting DDR2-800 for improved data throughput. While its single-threaded performance lags behind newer architectures, its quad-core design excels in parallel tasks like video encoding or virtualization. This 65W processor remains a practical option for budget-friendly desktops or low-power servers.
  2. The Q8400S’s 4-core, 4-thread configuration prioritizes efficiency over thread density, limiting its effectiveness in heavily threaded applications but excelling in traditional multitasking scenarios. At 2.67 GHz, it strikes a middle ground between performance and power consumption, avoiding the thermal spikes of higher-clock models while still outpacing many dual-core predecessors. Its 65W TDP makes it suitable for compact builds or environments where noise and heat are concerns, though it lacks the overclocking headroom of lower-TDP counterparts. The memory subsystem, optimized for DDR2-800, ensures compatibility with mainstream motherboards, though it doesn’t support faster memory standards. This 45nm processor remains a testament to Intel’s early quad-core innovation, offering predictable performance without excessive energy draw. The Q8400S is best deployed in workloads that distribute tasks across cores rather than relying on single-threaded intensity.
  3. The 2.67 GHz Intel Core 2 Quad Q8400S balances computational power with thermal efficiency, making it a versatile option for non-gaming or productivity-focused systems. Its 65W TDP and 45nm process reflect Intel’s commitment to energy-conscious design, even in quad-core configurations. While the memory subsystem supports DDR2-800, it doesn’t push the limits of modern high-speed RAM, which may hinder performance in memory-intensive applications. The Q8400S’s architecture, though dated by today’s standards, remains robust for legacy software or light office tasks. Its 4-core layout provides a significant edge over dual-core CPUs in parallel processing, though it lacks the thread density of hyper-threaded models. For users seeking a reliable, low-power quad-core, the 65W variant of this 2.67 GHz processor remains a pragmatic choice.

The AMD Equivalent of Core 2 Quad Q8400S

Looking for a similar processor from AMD? The AMD Ryzen 5 1400 offers comparable performance and features in the AMD lineup.

AMD Ryzen 5 1400

AMD • 4 Cores

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