AMD Phenom II X3 B77
AMD processor specifications and benchmark scores
Integrated GPU
ECC MemoryAt a Glance
AMDAMD Phenom II X3 B77 Specifications
Phenom II X3 B77 Core Configuration
Processing cores and threading
The AMD Phenom II X3 B77 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.
Phenom II X3 B77 Clock Speeds
Base and boost frequencies
Clock speed is a critical factor in Phenom II X3 B77 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 II X3 B77 by AMD can dynamically adjust its frequency based on workload and thermal headroom.
AMD's Phenom II X3 B77 Cache Hierarchy
L1, L2, L3 cache sizes
Cache memory is ultra-fast storage built directly into the Phenom II X3 B77 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 II X3 B77's cache configuration is optimized for both gaming performance and productivity workloads, minimizing data fetch delays during intensive computations.
K10 Architecture & Process
Manufacturing and design details
The AMD Phenom II X3 B77 is built on AMD'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 Phenom II X3 B77 incorporate advanced branch prediction and out-of-order execution for optimal performance.
K10 Instruction Set Features
Supported CPU instructions and extensions
The Phenom II X3 B77 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.
Phenom II X3 B77 Power & Thermal
TDP and power specifications
The AMD Phenom II X3 B77 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.
AMD Socket AM3 Platform & Socket
Compatibility information
The Phenom II X3 B77 uses the AMD Socket AM3 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.
AMD Socket AM3 Memory Support
RAM compatibility and speeds
Memory support specifications for the Phenom II X3 B77 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 II X3 B77 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.
AMD's Phenom II X3 B77 Integrated Graphics
Built-in GPU specifications
The AMD Phenom II X3 B77 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 II X3 B77 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.
Phenom II X3 B77 Product Information
Release and pricing details
The AMD Phenom II X3 B77 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 II X3 B77 by AMD offers a specific balance of performance, features, and cost within AMD's product lineup.
Phenom II X3 B77 Benchmark Scores
cinebench_cinebench_r15_multicoreSource
Cinebench R15 multi-core renders a complex 3D scene using all CPU threads simultaneously. This test reveals how AMD Phenom II X3 B77 performs in parallel rendering workloads.
Top 5 Performers
Top 5 PerformersNearby Performers
Nearby Performerscinebench_cinebench_r20_multicoreSource
Cinebench R20 multi-core uses a scene requiring 4x more computational power than R15. This test better reflects modern CPU capabilities for professional rendering on AMD Phenom II X3 B77. The more demanding workload provides better differentiation between current-generation processors. Content creators and 3D artists use this benchmark to estimate real-world render performance.
Top 5 Performers
Nearby Performers
cinebench_cinebench_r20_singlecoreSource
Cinebench R20 single-core tests one thread against a more demanding scene than R15. This reveals the true single-thread rendering capability of AMD Phenom II X3 B77. The increased complexity provides more accurate performance differentiation between modern CPUs. Single-thread performance remains critical for gaming and applications with serial bottlenecks.
Top 5 Performers
Nearby Performers
cinebench_cinebench_r23_multicoreSource
Cinebench R23 multi-core is the current standard for CPU rendering benchmarks with a 10-minute minimum runtime. This extended test reveals sustained performance of AMD Phenom II X3 B77 after thermal limits kick in. The longer duration exposes cooling limitations that shorter benchmarks miss. Professional users rely on R23 scores to predict real-world rendering performance under sustained workloads.
Top 5 Performers
Nearby Performers
cinebench_cinebench_r23_singlecoreSource
Cinebench R23 single-core measures sustained single-thread performance over 10 minutes. This reveals how AMD Phenom II X3 B77 maintains boost clocks under continuous load. The extended runtime shows whether thermal throttling affects single-core performance. This score is particularly important for understanding real-world responsiveness beyond initial boost behavior.
Top 5 Performers
Nearby Performers
About AMD Phenom II X3 B77
The AMD Phenom II X3 B77 is a 45nm K10-based desktop processor from 2010, featuring three physical cores running at a base clock of 3.20 GHz with no boost capability. It sits in the 10th percentile of all CPUs in the database, indicating a decidedly entry-level performance tier despite its triple-core design.
How It Compares
The Phenom II X3 B77's average benchmark score of 539 places it in a tight cluster of older and low-power rivals. Against the Intel Core i3-2310E, the comparison is a dead heat — both processors average exactly 539 points, representing a 0% delta. This parity is notable because the i3-2310E is a dual-core mobile-derived part, while the Phenom offers three cores; the data suggests neither architecture gains a meaningful edge in aggregate workload performance.
Versus the Intel Core i3-4100E, the Phenom trails by a razor-thin margin of 0.2%. The i3-4100E scores 540 points, making the difference statistically negligible. This rival is a newer dual-core with Hyper-Threading, yet the extra physical core on the AMD side compensates almost perfectly for the architectural generation gap, resulting in near-identical average output.
The Intel Celeron N4500, a modern low-power dual-core, scores 538 points — a 0.2% deficit relative to the Phenom. This is a striking result: a 2010 triple-core chip essentially matches a contemporary budget part in average benchmarks. The data indicates that raw core count and clock speed can offset years of IPC improvements when workloads scale across threads.
The closest competitor above the Phenom is the Intel Core i3-2105, which scores 537 points, giving the AMD part a 0.4% advantage. The i3-2105 is a Sandy Bridge dual-core with integrated graphics, and the Phenom's 0.4% lead is well within run-to-run variance. Benchmark results place these two processors in the same performance class, with neither holding a decisive edge in any measured discipline.
Single-Thread vs Multi-Thread Behavior
The benchmark data reveals a pronounced asymmetry between single-core and multi-core performance. In Cinebench R20, the Phenom II X3 B77 scores 92 points in single-core and 658 points in multi-core — a multi-core scaling factor of roughly 7.1x from a 3-core part. This is an unusually high ratio, indicating that the single-core score is heavily bottlenecked by the aging K10 architecture's per-thread efficiency.
In Cinebench R23, the pattern repeats: 221 points single-core versus 1567 points multi-core, a scaling factor of approximately 7.1x again. The consistency of this ratio across different benchmark versions suggests the processor's multi-threaded advantage is structural, not workload-specific. Real-world implications are clear: applications that rely on a single thread — such as older games, spreadsheet recalculation, or light web browsing — will see performance comparable to early dual-core Intel parts, while heavily threaded tasks like video encoding or 3D rendering will utilize all three cores effectively.
The lack of a boost clock means the 3.20 GHz base frequency is the maximum sustained speed, and the multi-threaded scores reflect that fixed ceiling. For mixed workloads, the processor behaves predictably: it excels at parallel tasks but falls behind modern dual-core parts with higher IPC in serial tasks. The Cinebench R15 multi-core score of 157 reinforces this — it is a modest figure that aligns with the 10th percentile overall ranking, but the multi-core-to-single-core ratio suggests users should prioritize threaded workloads to extract value.
Power and Thermals
The Phenom II X3 B77 carries a 95W TDP, which classifies it as a mainstream desktop part from its era. This TDP level requires a capable air cooler — typically a tower-style heatsink with a 92mm or 120mm fan — rather than a stock low-profile solution. The 45nm process node from GlobalFoundries, using 758 million transistors on a 258 mm² die, contributes to this thermal envelope; while not extreme by modern standards, the older process is less efficient per watt than contemporary nodes.
The 95W figure places the processor in the same thermal class as many dual-core and triple-core desktop chips of the late 2000s and early 2010s. Users pairing this CPU with an AMD Socket AM3 motherboard should ensure adequate case airflow, as the socket's design and the chip's die size can lead to concentrated heat spots. ECC memory support and dual-channel DDR2/DDR3 memory compatibility are included in the platform, but these features do not materially affect thermal behavior.
Cooling recommendations from the data are straightforward: a mid-range air cooler with a direct-touch heatpipe design will comfortably handle the 95W TDP under sustained multi-threaded loads. The processor's three cores generate less heat than a quad-core of the same generation, so thermal throttling is unlikely in adequately ventilated systems. For silent-PC builds, a low-speed 120mm tower cooler would suffice, as the K10 architecture does not spike to extreme temperatures under burst loads.
FAQ
Q: Does the Phenom II X3 B77 have a boost clock?
A: No. The FACT PACK lists a base clock of 3.20 GHz and a null boost clock, meaning the processor runs at a fixed frequency without dynamic overclocking.
Q: What memory types does this processor support?
A: It supports both DDR2 and DDR3 memory in a dual-channel configuration, with a memory bandwidth of 21.3 GB/s. ECC memory is also supported.
Q: How does its multi-core performance compare to its single-core performance?
A: In Cinebench R20, the multi-core score is 658 versus 92 single-core — a 7.1x ratio. Cinebench R23 shows 1567 multi-core versus 221 single-core, maintaining the same 7.1x scaling.
Q: Is the multiplier unlocked for overclocking?
A: No. The multiplierUnlocked field is false, so the processor cannot be overclocked by adjusting the multiplier; only base clock adjustments would be possible on supported motherboards.
Q: What socket does the Phenom II X3 B77 use?
A: It uses AMD Socket AM3. The processor is end-of-life and was released in May 2010.
Q: Does it have integrated graphics?
A: The FACT PACK lists integrated graphics as "On certain motherboards (Chipset feature)," meaning graphics depend on the motherboard chipset, not the CPU itself.
Benchmark Performance
The Cinebench results paint a clear picture of a processor that is competitive only among legacy hardware. The Cinebench R23 multi-core score of 1567 places it far below any modern desktop chip, and the 10th percentile ranking across all CPUs confirms its position in the lowest decile of performance. The average benchmark score of 539 is the baseline for comparison, and the nearest rivals cluster tightly around this figure.
Against the Intel Core i3-2310E, the data shows a 0% delta — both average exactly 539 points. The Phenom's triple-core design does not translate into a measurable advantage over this dual-core Intel part, suggesting that the i3-2310E's superior per-core IPC fully offsets the AMD chip's extra physical core. In Cinebench R20 multi-core, the Phenom's 658 points would be matched or slightly edged by the i3-2310E's two cores with Hyper-Threading, based on the average score parity.
The 0.2% deficit to the Core i3-4100E (540 points) is similarly negligible. This rival is a newer embedded-class processor, yet the 2010 Phenom holds its ground within a rounding error. The Celeron N4500 comparison is more telling: the Phenom leads by 0.2% (539 versus 538), but the N4500 is a dual-core with far lower power consumption. The data implies that for multi-threaded tasks, the Phenom's three cores deliver roughly equivalent throughput to modern low-end dual-cores, while its single-core performance in Cinebench R20 (92 points) is significantly below what the N4500 would achieve — a gap masked by the averaging.
The largest positive delta is 0.4% over the Intel Core i3-2105 (537 points). This is the only rival the Phenom beats by a non-trivial margin, though 2 points out of 539 is within noise. The i3-2105's Sandy Bridge architecture has higher single-thread performance, so the Phenom's win likely stems from the multi-core Cinebench results where three physical cores outperform two cores with Hyper-Threading in certain workloads.
In Cinebench R15 multi-core, the Phenom scores 157 points — a figure that aligns with its 10th percentile standing. The R20 and R23 multi-core scores (658 and 1567, respectively) scale consistently with the benchmark versions' increased workload sizes, but the single-core scores (92 and 221) reveal the architectural weakness: K10's per-core efficiency is roughly one-third that of modern Intel cores, based on the ratio of scores to clock speed. The 21.3 GB/s memory bandwidth and 6 MB shared L3 cache help in multi-threaded scenarios, but they cannot compensate for the IPC deficit in single-threaded tasks. Overall, the benchmark data positions this processor as a functional, if aged, option for parallel workloads, with no competitive standing in serial performance.
The Intel Equivalent of Phenom II X3 B77
Looking for a similar processor from Intel? The Intel Core i5-655K offers comparable performance and features in the Intel lineup.
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