Athlon II X4 640

Details and Benchmarks for AMD Athlon II X4 640

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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 X4 640 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,254 Rank: 1586
Rank Name Score Visual
1582 Core i7-920XM 4,257
+0.1%
1583 Atom C3758 4,256
+0%
1584 Core i3-2310M 4,255
+0%
1585 Athlon II X3 435 4,255
+0%
1586 Athlon II X4 640 4,254
1587 Pentium E6300 4,254
+0%
1588 FX-7600P 4,253
+-0%
1589 Core i5-3317U 4,253
+-0%
1590 Celeron J4025 4,253
+-0%
1591 Core i3 530 4,252
+-0%

View full ranking →

Multicore Score

Multicore performance score for Athlon II X4 640 based on multi-threaded benchmark results.

4,240 Rank: 1934
Rank Name Score Visual
1930 Atom N550 4,241
+0%
1931 Celeron N2807 4,241
+0%
1932 Pentium SU2700 4,241
+0%
1933 Athlon 64 2800+ 4,241
+0%
1934 Athlon II X4 640 4,240
1935 A4-4355M 4,240
+0%
1936 Athlon 64 3500+ 4,240
+0%
1937 Celeron N2815 4,240
+0%
1938 Sempron 3200+ 4,240
+0%
1939 Core 2 Duo T7500 4,239
+-0%

View full ranking →

Singlecore Score

Single-core performance score for Athlon II X4 640 based on single-threaded benchmark results.

4,264 Rank: 1518
Rank Name Score Visual
1514 Core 2 Quad Q8400 4,271
+0.2%
1515 A10-9620P 4,270
+0.1%
1516 Core i5-4200U 4,266
+0%
1517 Core 2 Duo P9700 4,266
+0%
1518 Athlon II X4 640 4,264
1519 A4-5300B 4,263
+-0%
1520 Pentium E6600 4,262
+-0%
1521 Celeron G1620T 4,261
-0.1%
1522 A8-3870 4,260
-0.1%
1523 Celeron J4125 4,260
-0.1%

View full ranking →

Workload Scores

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

Number Crunching

Aggregated score for Athlon II X4 640 based on integer math, floating point math, and prime number computation benchmarks.

4,522 Rank: 1369
Rank Name Score Visual
1365 Core M-5Y71 4,523
+0%
1366 Celeron G1630 4,523
+0%
1367 Core i3-550 4,523
+0%
1368 Pentium 4405U 4,522
+0%
1369 Athlon II X4 640 4,522
1370 Core i3-3110M 4,522
+0%
1371 Core i5-3337U 4,522
+0%
1372 Pentium G3220T 4,522
+0%
1373 Core m5-6Y54 4,521
+-0%
1374 Core i5-2520M 4,521
+-0%

View full ranking →

Data Processing

Aggregated score for Athlon II X4 640 based on data encryption, data compression, and string sorting benchmarks.

4,533 Rank: 1140
Rank Name Score Visual
1136 Xeon L5520 4,534
+0%
1137 Xeon E5472 4,534
+0%
1138 Core i7-6650U 4,533
+0%
1139 Core i3-7100H 4,533
+0%
1140 Athlon II X4 640 4,533
1141 Core i5-4330M 4,533
+0%
1142 PRO A10-8750B 4,533
+0%
1143 Pentium Gold G5400T 4,532
+-0%
1144 Core i5-4570T 4,532
+-0%
1145 Core i7-4600M 4,532
+-0%

View full ranking →

Physics & Compute

Aggregated score for Athlon II X4 640 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,502 Rank: 1391
Rank Name Score Visual
1387 A8-3800 4,503
+0%
1388 Pentium G3250T 4,503
+0%
1389 Core i3-560 4,503
+0%
1390 A8-6500B 4,503
+0%
1391 Athlon II X4 640 4,502
1392 Pentium G2010 4,502
+0%
1393 Athlon II X4 635 4,502
+0%
1394 A10-5750M 4,502
+0%
1395 A8-7200P 4,502
+0%
1396 A10-5757M 4,502
+0%

View full ranking →

Athlon II X4 640 Details

The AMD Athlon II X4 640, launched in May 2010, is a desktop processor from AMD's Athlon II X4 lineup, based on the Propus microarchitecture. With a 45 nm manufacturing process and 300 million transistors, it represents an older generation of CPUs that were once competitive in mainstream computing but now fall far behind modern performance benchmarks. As of early 2026, the Athlon II X4 640 is considered obsolete for most modern workloads due to its age and limited capabilities compared to current processors.

The processor features four cores and supports simultaneous multithreading, offering a total of four threads. It operates at a base frequency of 2.3 GHz, with a turbo frequency reaching 2.48 GHz, and includes a 15x clock multiplier. It uses a dual-channel DDR3 memory interface with support for up to 32 GB of memory, achieving a maximum memory bandwidth of 37.5 GB/s. The CPU is built on a 45 nm process and operates at a TDP of 95 W, requiring adequate cooling for sustained performance.

The Athlon II X4 640 lacks integrated graphics in its standard configuration, though certain motherboards with compatible chipsets can provide this capability. It supports a range of advanced instruction sets, including SSE, SSE2, SSE3, SSE4.1, SSE4.2, AVX2, AES, x86-64, and AMD-V, enabling compatibility with a wide range of software and virtualization environments. However, it does not support ECC memory or advanced features like Intel's TXT or vPro.

In benchmark testing, the Athlon II X4 640 scores 4,254 overall, placing it at #1586 out of 2060 processors. Its single-core performance is slightly better, with a score of 4,264 and a rank of #1518, while its multicore performance scores 4,240, ranking #1934. These results place it behind several modern low-power and mobile processors, such as the Core i5-4200U and A10-9620P, and even below older dual-core and quad-core designs like the Core 2 Duo P9700 and Phenom II X4 910e.

The processor's strongest category is single-core performance, where it ranks higher than many of its multicore competitors, but its weak points are evident in both overall and multicore scores. It is significantly outperformed by contemporary CPUs, even budget models like the Celeron J4125 and A4-5300B, which achieve similar or higher scores despite being built on more advanced architectures. The Athlon II X4 640 is best suited for legacy systems, retro computing, or basic office tasks where high performance is not required.

In summary, the Athlon II X4 640 is a historical processor that reflects AMD’s design philosophy from over a decade ago. While it was once a solid performer for its time, it now serves as a reference point for how far CPU technology has advanced. As of February 2026, it is no longer competitive in any mainstream computing scenario and is primarily of interest to enthusiasts, collectors, or users maintaining older systems.
Frequently Compared

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Intel Core i3-8145U 3 views

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AMD Ryzen 9 PRO 3900 1 view

AMD Ryzen 5 PRO 3500U 1 view

AMD Ryzen 3 PRO 2200GE 1 view

Intel Xeon Silver 4208 1 view

Intel Xeon Silver 4116 1 view

Intel Xeon Silver 4109T 1 view

AMD Athlon II X4 640

Main Specifications

Designer: AMD
Name: Athlon II X4 640
Model Number: 5405U
Cores: 2
Threads: 4
Base Frequency: 2300 MHz
Clock Multiplier: 15x (locked)
Core Name: Propus
Socket: FCBGA1528
Package: µPGA
Target Segment: Desktop
Max CPUs: 1
TDP: 15 W

Cache Specifications

L1 Cache: 124.928 KiB
L2 Cache: 0.488 MiB

Memory Specifications

Supported Memory Type: DDR4-2133, LPDDR3-1866
Memory Channels: 2
Maximum Memory: 0 GB
Maximum Bandwidth: 37.5 GB/s
ECC Support: No

PCI-Express Specifications

PCIe Revision: 2.0
PCIe Lanes: 12
PCIe Configuration: 1x4, 2x2, 1x2+2x1 and 4x1

Integrated Graphics

GPU: UHD Graphics 610
GPU Designer: Intel
GPU Max Frequency: 950 MHz

Physical Specifications

Process: 14 nm
Die Area: 169 mm²
Transistor Count: 0.00 billion
Word Size: 64-bit

CPU Features

MMX SSE SSE2 SSE3 SSE4.1 SSE4.2 AVX2 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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