Athlon II X3 400e

Details and Benchmarks for AMD Athlon II X3 400e

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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 Athlon II X3 400e based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,095 Rank: 1805
Rank Name Score Visual
1801 A8-7100 4,098
+0.1%
1802 Pentium N4200 4,095
+0%
1803 A10-7300 4,095
+0%
1804 Celeron 1007U 4,095
+0%
1805 Athlon II X3 400e 4,095
1806 Core i3-2357M 4,094
+-0%
1807 Pentium 967 4,090
-0.1%
1808 Athlon 64 X2 5400+ 4,089
-0.1%
1809 Core 2 Duo P7570 4,088
-0.2%
1810 Celeron 3855U 4,087
-0.2%

View full ranking →

Multicore Score

Multicore performance score for Athlon II X3 400e based on multi-threaded benchmark results.

4,328 Rank: 1662
Rank Name Score Visual
1658 Celeron 1037U 4,329
+0%
1659 A6-6310 4,329
+0%
1660 Core M 5Y10a 4,328
+0%
1661 Core i5-460M 4,328
+0%
1662 Athlon II X3 400e 4,328
1663 Athlon II X3 425 4,327
+-0%
1664 Core i3-3227U 4,327
+-0%
1665 A4-3400 4,327
+-0%
1666 Core i5-450M 4,327
+-0%
1667 Phenom X4 9750 4,327
+-0%

View full ranking →

Singlecore Score

Single-core performance score for Athlon II X3 400e based on single-threaded benchmark results.

3,940 Rank: 1810
Rank Name Score Visual
1806 Celeron B815 3,942
+0.1%
1807 A10-5745M 3,942
+0.1%
1808 Athlon II P320 3,942
+0.1%
1809 Pentium 4 3.00GHz 3,940
+0%
1810 Athlon II X3 400e 3,940
1811 Core 2 Duo T5870 3,939
+-0%
1812 Athlon II X2 235e 3,939
+-0%
1813 Athlon II P340 3,938
-0.1%
1814 E2-9000 3,938
-0.1%
1815 Celeron E1400 3,936
-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 Athlon II X3 400e based on integer math, floating point math, and prime number computation benchmarks.

4,494 Rank: 1583
Rank Name Score Visual
1579 A6-3420M 4,494
+0%
1580 Core i3-4012Y 4,494
+0%
1581 Pentium N3710 4,494
+0%
1582 Pentium N3530 4,494
+0%
1583 Athlon II X3 400e 4,494
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
+-0%

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Data Processing

Aggregated score for Athlon II X3 400e based on data encryption, data compression, and string sorting benchmarks.

4,480 Rank: 1456
Rank Name Score Visual
1452 Core i3-5005U 4,480
+0%
1453 Core M-5Y31 4,480
+0%
1454 A10-5745M 4,480
+0%
1455 A4-7210 4,480
+0%
1456 Athlon II X3 400e 4,480
1457 A6-6310 4,480
+0%
1458 Core i7-2610UE 4,479
+-0%
1459 Atom x7-Z8750 4,479
+-0%
1460 Celeron G1820 4,479
+-0%
1461 Core i3-5015U 4,479
+-0%

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Physics & Compute

Aggregated score for Athlon II X3 400e based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,479 Rank: 1548
Rank Name Score Visual
1544 A8-7410 4,479
+0%
1545 Celeron 1000M 4,479
+0%
1546 A8-4555M 4,479
+0%
1547 Phenom II X2 B57 4,479
+0%
1548 Athlon II X3 400e 4,479
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
+-0%

View full ranking →

Athlon II X3 400e Details

The AMD Athlon II X3 400e is a processor designed for budget-conscious desktop users seeking basic multitasking capabilities without the need for high-end performance. Launched in October 2009, this CPU is now over 14 years old, placing it firmly in the realm of legacy hardware. While it may no longer be relevant for modern computing demands, it remains a notable example of AMD's efforts to offer multi-core performance in the entry-level market during the late 2000s. Built on the Rana microarchitecture at a 45 nm process, the Athlon II X3 400e features three cores and a base clock of 2.2 GHz, with a locked multiplier that limits overclocking potential. It operates on the Socket AM3 platform and has a TDP of 45 W, making it relatively power-efficient for its time. The processor includes 512 KB of L2 cache per core, totaling 1.5 MiB, and supports DDR3 memory via a dual-channel interface. It does not include integrated graphics, though certain motherboards with compatible chipsets can provide this functionality. Despite its age, the Athlon II X3 400e supports modern instruction sets such as SSE2, SSE3, SSE4a, and AMD-V, ensuring compatibility with older software and virtualization workloads.

In terms of benchmark performance, the Athlon II X3 400e scores 4095 overall, placing it at rank #1802 out of 2060 processors in the database. Its single-core score of 3940 ranks #1809, while its multicore score of 4328 places it at #1660. These results reflect a processor that was once competitive in its segment but now lags significantly behind modern CPUs. When compared to contemporaries, it trails slightly behind the Athlon II X3 445 and Celeron N4000, both of which share similar overall scores, while it outperforms older dual-core processors like the Core i5-450M and Phenom X4 9750. The performance gap to top-tier processors is stark—modern leaders like the Ryzen Threadripper PRO 9995WX score over 9,000 in overall benchmarks, highlighting how far computing technology has advanced. The Athlon II X3 400e’s multicore performance is slightly stronger than its single-core performance, indicating that its three-core design provides a modest advantage in multithreaded applications, though it remains limited by its outdated architecture and clock speeds.

Given its age and performance profile, the Athlon II X3 400e is best suited for legacy systems, light office tasks, or as a replacement in low-demand environments such as media centers or embedded systems. It may also serve as a reference point for enthusiasts studying the evolution of AMD's processor lineup. While it lacks the modern features found in today's CPUs—such as high-speed cache, advanced power management, and support for newer memory standards—it represents a key milestone in AMD’s transition toward multi-core desktop processors. As of March 2026, it stands as a historical artifact, illustrating the pace of technological progress in the CPU market over the past decade and a half.
Frequently Compared

Intel Core M 5Y70 26 views

Intel Core 2 Duo E8600 25 views

AMD Athlon II X3 425 25 views

AMD Ryzen 5 3500X 24 views

AMD A10-4600M 23 views

AMD A9-9425 22 views

AMD A4-6300 21 views

AMD Ryzen 5 3600 20 views

AMD A10-5757M 20 views

AMD Ryzen Threadripper 1950X 20 views

AMD Athlon II X3 400e

Main Specifications

Designer: AMD
Name: Athlon II X3 400e
Cores: 3
Threads: 3
Base Frequency: 2200 MHz
Clock Multiplier: 11x (locked)
Core Name: Rana
Socket: Socket AM3
Package: µPGA
Target Segment: Desktop
TDP: 45 W

Cache Specifications

L1 Cache: 124.928 KiB
L2 Cache: 0.488 MiB

Memory Specifications

Supported Memory Type: DDR3

Physical Specifications

Process: 45 nm
Die Area: 169 mm²
Transistor Count: 0.00 billion

CPU Features

MMX SSE SSE2 SSE3 SSE4a AMD-V 3DNow!
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