Phenom II X3 720

Details and Benchmarks for AMD Phenom II X3 720

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Please take all results with a big grain of salt. Sysbuilds is in alpha stage at the moment which can lead to wrong data, strange counting errors, silly results and more. This site is under active development.

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

4,211 Rank: 1660
Rank Name Score Visual
1656 Celeron N4100 4,213
+0%
1657 Pentium 3550M 4,213
+0%
1658 Core i5-4202Y 4,213
+0%
1659 A4-3420 4,212
+0%
1660 Phenom II X3 720 4,211
1661 A10-4600M 4,211
+0%
1662 Core 2 Duo T5800 4,211
+0%
1663 Phenom II X3 B73 4,211
+0%
1664 Phenom II X2 B55 4,211
+0%
1665 Xeon E5345 4,210
+-0%

View full ranking →

Multicore Score

Multicore performance score for Phenom II X3 720 based on multi-threaded benchmark results.

4,293 Rank: 1774
Rank Name Score Visual
1770 A4-4000 4,295
+0%
1771 Pentium P6100 4,295
+0%
1772 Celeron 3205U 4,295
+0%
1773 Core 2 Duo P9500 4,294
+0%
1774 Phenom II X3 720 4,293
1775 A6-3620 4,293
+0%
1776 Core 2 Duo T9400 4,293
+0%
1777 Core 2 Duo E6750 4,293
+0%
1778 A4-3300 4,291
+-0%
1779 Celeron N2930 4,291
+-0%

View full ranking →

Singlecore Score

Single-core performance score for Phenom II X3 720 based on single-threaded benchmark results.

4,156 Rank: 1627
Rank Name Score Visual
1623 Celeron 1000M 4,160
+0.1%
1624 Core i3-4005U 4,159
+0.1%
1625 Core i5-2410M 4,157
+0%
1626 Athlon II X4 630 4,157
+0%
1627 Phenom II X3 720 4,156
1628 Phenom 9600 4,153
-0.1%
1629 Phenom II X4 920 4,152
-0.1%
1630 Core 2 Duo P8700 4,150
-0.1%
1631 Phenom II X4 830 4,147
-0.2%
1632 Pentium Gold 4415Y 4,146
-0.2%

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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 X3 720 based on integer math, floating point math, and prime number computation benchmarks.

4,506 Rank: 1486
Rank Name Score Visual
1482 A8-3510MX 4,507
+0%
1483 Celeron G1610T 4,507
+0%
1484 Core i3-2348M 4,506
+0%
1485 Athlon II X3 445 4,506
+0%
1486 Phenom II X3 720 4,506
1487 A8-3530MX 4,506
+0%
1488 Core i3-4010U 4,506
+0%
1489 Core i3-3227U 4,506
+0%
1490 Core i3-4005U 4,506
+0%
1491 Core i5-3339Y 4,506
+0%

View full ranking →

Data Processing

Aggregated score for Phenom II X3 720 based on data encryption, data compression, and string sorting benchmarks.

4,494 Rank: 1372
Rank Name Score Visual
1368 Pentium G3420 4,494
+0%
1369 Pentium G3250 4,494
+0%
1370 Core i7-4550U 4,494
+0%
1371 Core i5-3337U 4,494
+0%
1372 Phenom II X3 720 4,494
1373 Core i3-550 4,494
+0%
1374 Pentium 4405U 4,493
+-0%
1375 Athlon II X3 425 4,493
+-0%
1376 Core M3-7Y30 4,492
+-0%
1377 Celeron G4900T 4,492
+-0%

View full ranking →

Physics & Compute

Aggregated score for Phenom II X3 720 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,493 Rank: 1455
Rank Name Score Visual
1451 Pentium 3825U 4,494
+0%
1452 Pentium G2020T 4,494
+0%
1453 Atom C3538 4,493
+0%
1454 Athlon II X4 620 4,493
+0%
1455 Phenom II X3 720 4,493
1456 Xeon X3220 4,493
+0%
1457 A8-3510MX 4,493
+0%
1458 A10-7300 4,493
+0%
1459 Pentium G630 4,492
+-0%
1460 A6-7470K 4,492
+-0%

View full ranking →

Phenom II X3 720 Details

For users seeking a budget-friendly, multi-core desktop processor with integrated graphics potential, the AMD Phenom II X3 720 offers a glimpse into an era when 3-core designs were a viable alternative to quad-core offerings. Released in January 2010, this processor is now over 14 years old, placing it firmly in the legacy category. Despite its age, it remains relevant in niche scenarios such as retro builds, embedded systems, or as a replacement in older motherboards where modern CPUs are incompatible.

Built on AMD's Heka microarchitecture and fabricated on a 45 nm process by GlobalFoundries, the Phenom II X3 720 features three physical cores with a base clock of 2.5 GHz and a turbo frequency of 2.66 GHz. It operates on the LGA771 socket, which was used in older AMD desktop platforms. The processor has a total of 6 MB of L3 cache—comprising 0.122 MiB of L1 and 0.488 MiB of L2 cache per core—providing moderate data throughput for its time. It supports dual-channel DDR3 memory up to 1333 MT/s, with a maximum memory capacity of 16 GB and a memory bandwidth of 21.3 GB/s, though the system is limited to two memory channels.

The Phenom II X3 720 has a TDP of 80 W, which necessitates adequate cooling, especially in systems without proper airflow. While it does not include a dedicated integrated GPU, certain motherboards equipped with compatible chipsets—such as those from nForce or AMD 700/800/900 series—can provide basic graphics output through integrated HD Graphics 5500. This GPU supports up to three displays and can reach a burst frequency of 850 MHz, though its performance is limited to basic desktop use and light multimedia playback.

Key features include support for 64-bit computing, SSE4.1 and SSE4.2 instruction sets, and AMD-V virtualization, enabling efficient virtual machine performance. The processor also supports ECC memory, a rare feature in consumer-grade CPUs, making it suitable for entry-level servers or workstations where data integrity is critical. However, it lacks simultaneous multithreading and has a locked clock multiplier, limiting overclocking potential.

In benchmark testing, the Phenom II X3 720 scores 4211 in the Overall Score, ranking #1660 out of 2060 processors. Its Singlecore Score of 4156 places it at #1627, while its Multicore Score of 4293 ranks it #1774. These results place it below modern processors but competitive with some low-end mobile and embedded CPUs from the early 2010s. It outperforms several Intel Celerons and AMD A4/A6 series from the same era but trails behind contemporary Core i3 and Athlon II models.

As of March 2026, the Phenom II X3 720 is best suited for legacy systems, retro computing projects, or as a low-cost upgrade in older desktops where modern CPUs are unavailable. While it lacks the power and efficiency of today’s processors, its integrated graphics support and ECC memory capability make it a unique option in the right context.
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AMD Phenom II X3 720

Main Specifications

Designer: AMD
Name: Phenom II X3 720
Model Number: E5420
Cores: 4
Threads: 4
Base Frequency: 2500 MHz
Clock Multiplier: 14x (locked)
Core Name: Heka
Socket: LGA771
Package: µPGA
Target Segment: Desktop
Max CPUs: 1
TDP: 80 W

Cache Specifications

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

Memory Specifications

Supported Memory Type: DDR3L 1333/1600 LPDDR 1333 /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: 4x1 2x4

Integrated Graphics

GPU: HD Graphics 5500
GPU Designer: Intel
GPU Max Frequency: 850 MHz

Physical Specifications

Process: 45 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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