Phenom II X4 B55 Benchmarks & Performance Report

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Benchmark Results

Combined benchmark scores based on multiple data points, giving a quick overview of this processor's performance.

Overall Score

Overall score for Phenom II X4 B55 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,428 Rank: 1362

Rank	Name	Score	Visual
1358	Xeon E5-2650L v2	4,431	+0.1%
1359	Core i5-2390T	4,431	+0.1%
1360	Athlon X4 840	4,431	+0.1%
1361	Pentium 4415U	4,430	+0%
1362	Phenom II X4 B55	4,428
1363	Core i3-2120T	4,427	+-0%
1364	A10 PRO-7800B	4,426	+-0%
1365	FX-8800P	4,424	-0.1%
1366	Core i5-2515E	4,423	-0.1%
1367	A10-7700K	4,423	-0.1%

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Multicore Score

Multicore performance score for Phenom II X4 B55 based on multi-threaded benchmark results.

4,530 Rank: 1178

Rank	Name	Score	Visual
1174	Xeon E5507	4,533	+0.1%
1175	Phenom II X4 940	4,532	+0%
1176	Xeon D-1518	4,531	+0%
1177	Core i3-2357M	4,530	+0%
1178	Phenom II X4 B55	4,530
1179	Core i5-6260U	4,529	+-0%
1180	Intel Core i3-7100U	4,528	+-0%
1181	A8-7650K	4,527	-0.1%
1182	Core i7-5650U	4,526	-0.1%
1183	Core i5-5257U	4,526	-0.1%

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Singlecore Score

Single-core performance score for Phenom II X4 B55 based on single-threaded benchmark results.

4,360 Rank: 1430

Rank	Name	Score	Visual
1426	Xeon L5640	4,362	+0%
1427	Core i5-2557M	4,361	+0%
1428	Athlon II X4 555	4,361	+0%
1429	PRO A10-8750B	4,361	+0%
1430	Phenom II X4 B55	4,360
1431	Xeon X5450	4,358	+-0%
1432	Xeon E5-2430 v2	4,358	+-0%
1433	Core i3-560	4,357	-0.1%
1434	Core i7-940	4,356	-0.1%
1435	Athlon II X2 270	4,355	-0.1%

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Workload Scores

Performance scores grouped by workload type, normalized and aggregated from multiple raw benchmark results.

Number Crunching

Aggregated score for Phenom II X4 B55 based on integer math, floating point math, and prime number computation benchmarks.

4,544 Rank: 1203

Rank	Name	Score	Visual
1199	Phenom II X4 B60	4,545	+0%
1200	Pentium G4400	4,544	+0%
1201	Core i5-6360U	4,544	+0%
1202	Phenom II X4 975	4,544	+0%
1203	Phenom II X4 B55	4,544
1204	Pentium G3450T	4,544	+0%
1205	Core i3-4150T	4,544	+0%
1206	Pentium G3258	4,543	+-0%
1207	Pentium G3260	4,543	+-0%
1208	Core i7-4600U	4,543	+-0%

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Data Processing

Aggregated score for Phenom II X4 B55 based on data encryption, data compression, and string sorting benchmarks.

4,547 Rank: 1066

Rank	Name	Score	Visual
1062	Core i5-2405S	4,548	+0%
1063	Phenom II X4 B60	4,548	+0%
1064	Core i7-6567U	4,547	+0%
1065	Core i3-4170	4,547	+0%
1066	Phenom II X4 B55	4,547
1067	Athlon X4 860K	4,547	+0%
1068	Core i5-7260U	4,546	+-0%
1069	Core i3-4350	4,546	+-0%
1070	Phenom II X4 975	4,546	+-0%
1071	A10-7850K	4,546	+-0%

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Physics & Compute

Aggregated score for Phenom II X4 B55 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,515 Rank: 1298

Rank	Name	Score	Visual
1294	A8-5500B	4,516	+0%
1295	Core i7-2677M	4,515	+0%
1296	Pentium G3260	4,515	+0%
1297	Pentium G3420	4,515	+0%
1298	Phenom II X4 B55	4,515
1299	Phenom II X4 B50	4,515	+0%
1300	Xeon E5506	4,515	+0%
1301	Core M-5Y71	4,515	+0%
1302	Core M-5Y31	4,515	+0%
1303	Core i5-680	4,515	+0%

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Phenom II X4 B55 Details

Ranking #1362 of 2060 in overall performance, the Phenom II X4 B55 sits in the middle tier of processors when compared to the broader CPU landscape as of March 2026. While it may not compete with modern high-end CPUs, its position reflects a design optimized for cost-effective performance in mainstream desktop systems from the early 2010s. The processor was released during a time when multi-core computing was gaining traction, though still in its early stages for consumer-grade applications.

Manufactured by AMD, the Phenom II X4 B55 is built on the 32 nm process node and uses the FCLGA1156 socket, a common interface for its era. It features a dual-core design with four threads, enabled through AMD's SMT (Simultaneous Multithreading) technology, allowing it to handle multitasking more efficiently than its single-threaded predecessors. The base clock speed is 3.2 GHz, with a turbo frequency of 3.46 GHz, making it capable of sustained performance under moderate workloads.

The processor supports DDR3 1066/1333 memory, with a maximum capacity of 16 GB and a memory bandwidth of 21 GB/s across two channels. Its integrated graphics, based on the Intel HD Graphics architecture, operates at a base frequency of 733 MHz and can support up to two displays. The GPU includes a burst frequency of 1100 MHz and supports up to 1.7 GB of shared memory, offering basic multimedia and light gaming capabilities.

Despite being a relatively older design, the Phenom II X4 B55 includes several advanced features such as SSE4.1, SSE4.2, AVX2, AES encryption, and Intel’s vPro, TXT, and VT-x virtualization technologies. It also supports ECC memory, making it suitable for workstations requiring data integrity. The TDP of 73 W reflects a balance between performance and power consumption, though it is higher than modern low-power processors.

In benchmark testing, the Phenom II X4 B55 achieves a single-core score of 4360, placing it at #1430 of 2060, and a multicore score of 4530, ranking #1177 of 2060. Its overall score of 4428 puts it ahead of some modern low-power processors like the Core i3-6260U and A8-7650K, but behind higher-tier CPUs such as the Core i5-2400S and Xeon E5507. This suggests that while it holds its own in single-threaded tasks, its multicore performance is more competitive.

The processor's strongest category is its single-core performance, where it outperforms many modern low-power mobile chips. However, its multicore strength is more modest, especially when compared to current-generation CPUs. This makes it suitable for general productivity, light content creation, and older gaming applications, but less ideal for heavy computational workloads or modern multi-threaded software.

Overall, the Phenom II X4 B55 remains a viable option for budget-conscious users or those maintaining legacy systems. While it lacks the efficiency and performance of modern processors, its feature set and compatibility with DDR3 memory make it a practical choice for entry-level desktop use in 2026.