Phenom II X3 B77

Details and Benchmarks for AMD Phenom II X3 B77

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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 X3 B77 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,349 Rank: 1473
Rank Name Score Visual
1469 Athlon II X4 645 4,351
+0%
1470 Core i3-6006U 4,350
+0%
1471 A6-7400K 4,350
+0%
1472 Core i5-580M 4,349
+0%
1473 Phenom II X3 B77 4,349
1474 Pentium E6800 4,345
-0.1%
1475 A8-5500B 4,344
-0.1%
1476 Phenom II N950 4,343
-0.1%
1477 A8-6500B 4,343
-0.1%
1478 Intel Core i7-720QM 4,342
-0.2%

View full ranking →

Multicore Score

Multicore performance score for Phenom II X3 B77 based on multi-threaded benchmark results.

4,424 Rank: 1400
Rank Name Score Visual
1396 Core i5-3437U 4,425
+0%
1397 Core i7-860S 4,425
+0%
1398 FX-4130 4,425
+0%
1399 A10 PRO-7800B 4,425
+0%
1400 Phenom II X3 B77 4,424
1401 Celeron G4920 4,423
+-0%
1402 Phenom II X4 840T 4,423
+-0%
1403 Phenom II X4 910 4,423
+-0%
1404 Core i5-6200U 4,422
+-0%
1405 Athlon II X2 265 4,422
+-0%

View full ranking →

Singlecore Score

Single-core performance score for Phenom II X3 B77 based on single-threaded benchmark results.

4,299 Rank: 1491
Rank Name Score Visual
1487 Phenom II X4 B45 4,300
+0%
1488 Athlon II X2 250 4,300
+0%
1489 Core i5 M 520 4,299
+0%
1490 Core 2 Duo E7600 4,299
+0%
1491 Phenom II X3 B77 4,299
1492 Xeon E5630 4,297
+-0%
1493 Core 2 Duo T9900 4,296
-0.1%
1494 Xeon L5638 4,294
-0.1%
1495 Athlon II X2 260 4,289
-0.2%
1496 Phenom II X4 850 4,288
-0.3%

View full ranking →

Workload Scores

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

Number Crunching

Aggregated score for Phenom II X3 B77 based on integer math, floating point math, and prime number computation benchmarks.

4,515 Rank: 1425
Rank Name Score Visual
1421 Pentium G850 4,515
+0%
1422 Celeron G1610 4,515
+0%
1423 Pentium N4200 4,515
+0%
1424 Core i3-2100T 4,515
+0%
1425 Phenom II X3 B77 4,515
1426 Athlon 5350 4,515
+0%
1427 Core i7-2677M 4,514
+-0%
1428 Core i5-2435M 4,514
+-0%
1429 Atom C3508 4,514
+-0%
1430 Pentium G645 4,514
+-0%

View full ranking →

Data Processing

Aggregated score for Phenom II X3 B77 based on data encryption, data compression, and string sorting benchmarks.

4,508 Rank: 1283
Rank Name Score Visual
1279 Pentium G4520 4,508
+0%
1280 Core i3-6157U 4,508
+0%
1281 Core i3-2100 4,508
+0%
1282 FX-7600P 4,508
+0%
1283 Phenom II X3 B77 4,508
1284 Core i5-8210Y 4,508
+0%
1285 Core i7-4510U 4,507
+-0%
1286 Core i3-2105 4,507
+-0%
1287 FX-9800P 4,507
+-0%
1288 A10-9620P 4,507
+-0%

View full ranking →

Physics & Compute

Aggregated score for Phenom II X3 B77 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,498 Rank: 1425
Rank Name Score Visual
1421 Pentium G870 4,498
+0%
1422 Pentium G645 4,498
+0%
1423 Phenom II X4 810 4,498
+0%
1424 Xeon E5420 4,498
+0%
1425 Phenom II X3 B77 4,498
1426 Celeron N4100 4,497
+-0%
1427 Xeon X5472 4,497
+-0%
1428 Celeron G1620 4,497
+-0%
1429 Celeron G1610 4,497
+-0%
1430 FX-7500 4,497
+-0%

View full ranking →

Phenom II X3 B77 Details

The AMD Phenom II X3 B77 was designed for budget-conscious desktop users who needed a balance of performance and cost, particularly those building systems around Socket AM3 motherboards in the early 2010s. Launched in May 2010, this processor is now over 13 years old, placing it firmly in the legacy category of computing hardware. Despite its age, it still holds relevance in retro builds, low-cost systems, or as a reference point for understanding the evolution of multi-core processors. Built on AMD's 45 nm Heka microarchitecture, the Phenom II X3 B77 features three cores and three threads, with a base clock of 3.2 GHz and a locked multiplier, limiting its overclocking potential. It is manufactured by GlobalFoundries and includes 6 MB of L3 cache, 0.122 MiB of L1 cache, and 0.488 MiB of L2 cache. The processor operates at a TDP of 95 W, which necessitates adequate cooling, especially under sustained loads.

Memory support includes DDR3 with dual-channel capability, rated at up to 1333 MT/s, though higher speeds can be achieved through manual overclocking. The chip supports ECC memory, a feature often found in professional or server environments, which adds to its appeal for niche applications requiring data integrity. Connectivity is handled via PCI-Express Gen 2, and while the CPU itself does not include integrated graphics, certain compatible chipsets can provide this functionality. The processor supports a range of instruction sets, including MMX, SSE, SSE2, SSE3, SSE4a, and AMD-V, enabling efficient virtualization and multimedia performance.

In benchmark testing, the Phenom II X3 B77 scores 4349 overall, ranking #1472 out of 2060 processors, with a single-core score of 4299 (#1489) and a multicore score of 4424 (#1400). These results place it behind several modern budget and mid-tier processors, such as the Core i3-6006U and A6-7400K, but ahead of older models like the Pentium E6800 and A8-6500B. Its multicore performance is particularly strong relative to its single-core capabilities, indicating that it benefits more from multi-threaded workloads. However, its performance is far behind the top-tier processors in the current market, such as the Ryzen Threadripper PRO 9995WX or Core Ultra 9 285K, which are over 20 times faster in overall scoring.

Given its age and performance level, the Phenom II X3 B77 is best suited for basic computing tasks, light office applications, and retro gaming systems. It is not ideal for modern gaming, content creation, or high-performance computing, where current-generation CPUs offer vastly superior performance and efficiency. As of March 2026, it remains a relic of the past—valuable for historical insight but largely obsolete in today’s computing landscape.
Frequently Compared

AMD EPYC 7542 28 views

Intel Core M 5Y31 27 views

AMD Ryzen 7 2700 22 views

Intel Celeron G530 22 views

AMD Athlon II X2 265 21 views

AMD A4-6300 21 views

Intel Core 2 Duo E8600 21 views

AMD Athlon II X2 270 19 views

AMD Ryzen 5 3600 18 views

AMD Ryzen 5 3500X 17 views

AMD Phenom II X3 B77

Main Specifications

Designer: AMD
Name: Phenom II X3 B77
Cores: 3
Threads: 3
Base Frequency: 3200 MHz
Clock Multiplier: 16x (locked)
Core Name: Heka
Socket: Socket AM3
Package: µPGA
Target Segment: Desktop
TDP: 95 W

Cache Specifications

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

Memory Specifications

Supported Memory Type: DDR3

Physical Specifications

Process: 45 nm
Die Area: 258 mm²
Transistor Count: 0.00 billion
Manufacturer: GlobalFoundries

CPU Features

MMX SSE SSE2 SSE3 ABM SSE4a AMD-V 3DNow!
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