Phenom II X2 550

Details and Benchmarks for AMD Phenom II X2 550

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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 X2 550 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,314 Rank: 1505
Rank Name Score Visual
1501 A8-3870 4,316
+0%
1502 Xeon W3505 4,316
+0%
1503 Pentium 2030M 4,315
+0%
1504 Celeron G1610 4,314
+0%
1505 Phenom II X2 550 4,314
1506 A9-9425 4,313
+-0%
1507 Core i3-540 4,313
+-0%
1508 A10-9620P 4,312
+-0%
1509 A4-6300 4,312
+-0%
1510 Core 2 Duo E8500 4,312
+-0%

View full ranking →

Multicore Score

Multicore performance score for Phenom II X2 550 based on multi-threaded benchmark results.

4,359 Rank: 1558
Rank Name Score Visual
1554 Phenom II P960 4,360
+0%
1555 Core i3-550 4,360
+0%
1556 Athlon II X4 610e 4,360
+0%
1557 A10-7400P 4,359
+0%
1558 Phenom II X2 550 4,359
1559 Pentium G3220T 4,359
+0%
1560 A8-5550M 4,358
+-0%
1561 Core i5-4250U 4,357
+-0%
1562 Athlon X2 240 4,357
+-0%
1563 Celeron G1620T 4,357
+-0%

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Singlecore Score

Single-core performance score for Phenom II X2 550 based on single-threaded benchmark results.

4,284 Rank: 1501
Rank Name Score Visual
1497 Core i3-4030U 4,288
+0.1%
1498 Core i3-540 4,288
+0.1%
1499 Xeon X5472 4,286
+0%
1500 A4-5300 4,286
+0%
1501 Phenom II X2 550 4,284
1502 Pentium E5800 4,283
+-0%
1503 Xeon E5520 4,282
+-0%
1504 Phenom II X2 B57 4,282
+-0%
1505 Phenom II N950 4,281
-0.1%
1506 FX-6100 4,280
-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 X2 550 based on integer math, floating point math, and prime number computation benchmarks.

4,493 Rank: 1588
Rank Name Score Visual
1584 Celeron N4000 4,493
+0%
1585 Celeron 3965Y 4,493
+0%
1586 Celeron B840 4,493
+0%
1587 Pentium E6800 4,493
+0%
1588 Phenom II X2 550 4,493
1589 Pentium E6500 4,493
+0%
1590 A6-3410MX 4,493
+0%
1591 A6-3400M 4,493
+0%
1592 Celeron J1900 4,493
+0%
1593 Pentium N3520 4,493
+0%

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Data Processing

Aggregated score for Phenom II X2 550 based on data encryption, data compression, and string sorting benchmarks.

4,468 Rank: 1545
Rank Name Score Visual
1541 Core i3-370M 4,469
+0%
1542 Celeron 4305U 4,469
+0%
1543 Core i3-2312M 4,468
+0%
1544 A4-6300 4,468
+0%
1545 Phenom II X2 550 4,468
1546 Pentium E6500 4,468
+0%
1547 Celeron N2920 4,468
+0%
1548 A6-5400B 4,468
+0%
1549 Phenom II X2 B55 4,468
+0%
1550 Core i5-2467M 4,467
+-0%

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Physics & Compute

Aggregated score for Phenom II X2 550 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,478 Rank: 1553
Rank Name Score Visual
1549 A4-7300 4,479
+0%
1550 A8-6410 4,479
+0%
1551 Core i3-2357M 4,478
+0%
1552 Pentium G6950 4,478
+0%
1553 Phenom II X2 550 4,478
1554 A6-7310 4,478
+0%
1555 Celeron 1037U 4,478
+0%
1556 A6-5200 4,478
+0%
1557 Pentium 3556U 4,478
+0%
1558 A6-3430MX 4,478
+0%

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Phenom II X2 550 Details

As of March 2026, the AMD Phenom II X2 550 remains a relic of the late 2000s, representing an era when dual-core desktop processors were common and integrated graphics were not standard. Launched in November 2009, this processor is now over 14 years old, placing it well beyond its relevance in modern computing. Built on AMD’s Callisto microarchitecture and fabricated on a 45 nm process by GlobalFoundries, the Phenom II X2 550 was designed for the Socket AM3 platform and targeted mainstream desktop users seeking a balance between performance and cost. Despite its age, the chip still holds a place in the benchmark rankings due to its relatively robust performance for its time.

The Phenom II X2 550 features two cores with a base clock of 3.1 GHz, which is impressive for its generation, though it lacks simultaneous multithreading, resulting in a total of two threads. It includes 6 MB of L3 cache and operates with a TDP of 80 W, which was considered high for a desktop CPU at launch, requiring adequate cooling solutions. The processor supports DDR2 and DDR3 memory via a dual-channel interface, with a maximum rated speed of 1333 MT/s, though overclocking can push memory performance further. It also supports ECC memory, a feature typically reserved for more enterprise-oriented systems, which adds a layer of reliability for users who need it.

In terms of real-world performance, the Phenom II X2 550 achieves an Overall Score of 4314, ranking #1504 out of 2060 processors in the database. Its Singlecore Score of 4284 places it at #1501, while its Multicore Score of 4359 ranks it #1557. These results show that the CPU is competitive with older-generation Intel and AMD processors such as the Core i3-540 and Athlon II X4 610e, but it falls significantly behind modern CPUs. The multicore performance is particularly weak compared to single-core performance, indicating that the processor’s strength lies in tasks optimized for single-threaded execution rather than parallel processing.

The Phenom II X2 550 does not include integrated graphics, but certain motherboards with compatible chipsets—such as those in the AMD 700, 800, and 900 Series—can provide basic graphics through the chipset’s integrated GPU. This capability was common in older platforms where discrete GPUs were not standard. The processor supports a range of technologies, including SSE, SSE2, SSE3, SSE4.1, SSE4.2, AES-NI, and AMD-V for virtualization, but lacks support for modern instruction sets like AVX-512. While it was a capable processor in its time, the Phenom II X2 550 now serves best as a low-cost option for legacy systems, retro builds, or educational purposes rather than for modern applications or gaming.
Frequently Compared

AMD Athlon II X2 260 37 views

AMD A10-4600M 36 views

AMD Phenom 9750 34 views

AMD Ryzen 5 3500X 33 views

Intel Celeron G530 33 views

Intel Core i3-4030U 33 views

AMD A6-3620 32 views

Intel Core 2 Duo E8600 31 views

Intel Xeon W3505 30 views

Intel Xeon Silver 4110 29 views

AMD Phenom II X2 550

Main Specifications

Designer: AMD
Name: Phenom II X2 550
Model Number: 5Y51
Cores: 2
Threads: 4
Base Frequency: 1100 MHz
Clock Multiplier: 15.5xx (locked)
Core Name: Callisto
Socket: FCBGA1234
Package: µPGA
Target Segment: Desktop
Max CPUs: 1
TDP: 4.5 W

Cache Specifications

L1 Cache: 124.928 KiB
L2 Cache: 0.488 MiB
L3 Cache: 5.722 MiB

Memory Specifications

Supported Memory Type: LPDDR3 1333/1600; DDR3L/DDR3L-RS 1600
Memory Channels: 2
Maximum Memory: 0 GB
Maximum Bandwidth: 25.6 GB/s
ECC Support: No

PCI-Express Specifications

PCIe Revision: 2.0
PCIe Lanes: 12
PCIe Configuration: x1 (6), x2 (4), x4 (3)

Integrated Graphics

GPU: HD Graphics 5300
GPU Designer: Intel
GPU Max Frequency: 900 MHz

Physical Specifications

Process: 14 nm
Die Area: 258 mm²
Transistor Count: 0.00 billion
Manufacturer: GlobalFoundries
Word Size: 64-bit

CPU Features

MMX SSE SSE2 SSE3 SSE4.1 SSE4.2 ABM AES x86-64 HT EIST TXT vPro VT-x VT-d EPT Secure Key SMEP SIPP IPT SSE4a AMD-V TSX Flex Memory FMA 3DNow!
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