AMD

AMD Phenom X3 8400

AMD processor specifications and benchmark scores

3
Cores
3
Threads
โ€”
GHz Boost
95W
TDP
๐Ÿ–ฅ๏ธIntegrated GPU

AMD Phenom X3 8400 Specifications

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Phenom X3 8400 Core Configuration

Processing cores and threading

The AMD Phenom X3 8400 features 3 physical cores and 3 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
3
Threads
3
SMP CPUs
1
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Phenom X3 8400 Clock Speeds

Base and boost frequencies

Clock speed is a critical factor in Phenom X3 8400 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 Phenom X3 8400 by AMD can dynamically adjust its frequency based on workload and thermal headroom.

Base Clock
2.1 GHz
Boost Clock
N/A
Multiplier
10.5x
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AMD's Phenom X3 8400 Cache Hierarchy

L1, L2, L3 cache sizes

Cache memory is ultra-fast storage built directly into the Phenom X3 8400 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 Phenom X3 8400's cache configuration is optimized for both gaming performance and productivity workloads, minimizing data fetch delays during intensive computations.

L1 Cache
128 KB (per core)
L2 Cache
512 KB (per core)
L3 Cache
2 MB (shared)
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K10 Architecture & Process

Manufacturing and design details

The AMD Phenom X3 8400 is built on AMD's 65 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 Phenom X3 8400 incorporate advanced branch prediction and out-of-order execution for optimal performance.

Architecture
K10
Codename
Toliman
Process Node
65 nm
Transistors
450 million
Die Size
285 mmยฒ
Generation
Phenom X3 (Toliman)
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K10 Instruction Set Features

Supported CPU instructions and extensions

The Phenom X3 8400 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
SSE4A
AMD64
AMD-V
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Phenom X3 8400 Power & Thermal

TDP and power specifications

The AMD Phenom X3 8400 has a TDP (Thermal Design Power) of 95W, 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
95W
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AMD Socket AM2+ Platform & Socket

Compatibility information

The Phenom X3 8400 uses the AMD Socket AM2+ 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 AM2+
PCIe
Gen 2
Package
ยตPGA
DDR5

AMD Socket AM2+ Memory Support

RAM compatibility and speeds

Memory support specifications for the Phenom X3 8400 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 Phenom X3 8400 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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AMD's Phenom X3 8400 Integrated Graphics

Built-in GPU specifications

The AMD Phenom X3 8400 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 Phenom X3 8400 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)
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Phenom X3 8400 Product Information

Release and pricing details

The AMD Phenom X3 8400 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 Phenom X3 8400 by AMD offers a specific balance of performance, features, and cost within AMD's product lineup.

Manufacturer
AMD
Release Date
Mar 2008
Market
Desktop
Status
End-of-life
Part Number
HD8400WCJ3BGD

Phenom X3 8400 Benchmark Scores

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No benchmark data available for this CPU.

About AMD Phenom X3 8400

Ever wondered how the AMD Phenom X3 8400 holds up in everyday tasks back in its day? With just three cores clocked at 2.1 GHz and a shared 2MB L3 cache, it was designed for basic multitasking, but does it really deliver smooth performance for web browsing or office work? That 95W TDP means it runs hot, so expect to crank up the cooling if you're pushing it. In real-world scenarios like video editing or light productivity, it chugs along decently for 2008 standards, but modern apps might leave you waiting. Can this Phenom X3 8400 still boot up your retro setup without hiccups? Overall, it's reliable for nostalgia builds, yet you'll question its speed against anything newer. Gamers repurposing it for emulators might find it adequate, but don't expect miracles. What about gaming on the AMD Phenom X3 8400 can a triple-core chip from the Phenom era tackle your favorite titles? At 2.1 GHz on a 65nm process, it struggles with anything beyond low-res older games like Crysis or World of Warcraft on minimal settings. Pair it with a decent GPU from that time, and you might squeeze out 30 FPS in classics, but modern ports? Forget it they'll stutter and crash under the load. Does the lack of hyper-threading hurt here, forcing single-thread reliance? For LAN parties with Source engine games, it shines surprisingly well. Still, questioning its viability for today's esports? It's more a museum piece for retro gaming rigs than a current contender. Is the Phenom X3 8400 a smart buy for budget gamers chasing value? Released in 2008, these chips are dirt cheap now, often under $20 used, making them super cost-effective for DIY projects. But with no benchmark dominance and high power draw, do savings outweigh the electricity bill? Compared to dual-cores of the era, its three cores offer a slight edge in multi-threaded games, yet efficiency lags. Can you build a sub-$100 gaming PC around it that actually plays? Absolutely, if you're into pixelated throwbacks. Ultimately, its low cost makes it a no-brainer for tinkerers questioning entry-level AMD heritage. Wondering about motherboard support for AMD's Phenom X3 8400? It slots into AM2+ sockets, so any compatible board from 2007-2009 works, like Gigabyte or ASUS models. But does it play nice with AM2 boards via BIOS flash? Often yes, expanding your options cheaply. Upgrading to Phenom II later is possible on the same socket, future-proofing your spend. Will DDR2 RAM hold it back in 2023? Definitely, capping bandwidth for games. Still, scavenging eBay for AM2+ mobos keeps costs low question is, how patient are you hunting deals? It's a forgiving platform for Phenom fans experimenting.

The Intel Equivalent of Phenom X3 8400

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 โ€ข 4 Cores

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