Athlon II X4 631

Details and Benchmarks for AMD Athlon II X4 631

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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 Athlon II X4 631 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,381 Rank: 1429
Rank Name Score Visual
1425 Pentium Silver J5005 4,382
+0%
1426 Core i5-2520M 4,382
+0%
1427 A8-5600K 4,382
+0%
1428 A8-6500 4,381
+0%
1429 Athlon II X4 631 4,381
1430 PRO A10-8750B 4,381
+0%
1431 Celeron G1840T 4,379
+-0%
1432 A8-7500 4,378
-0.1%
1433 Phenom II X4 850 4,378
-0.1%
1434 Pentium G640 4,378
-0.1%

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Multicore Score

Multicore performance score for Athlon II X4 631 based on multi-threaded benchmark results.

4,313 Rank: 1716
Rank Name Score Visual
1712 Core i7-2640M 4,314
+0%
1713 Core i5-2415M 4,314
+0%
1714 Celeron 2957U 4,314
+0%
1715 Core M 5Y71 4,313
+0%
1716 Athlon II X4 631 4,313
1717 Pentium 3805U 4,313
+0%
1718 A4-3420 4,313
+0%
1719 Core i5-8200Y 4,313
+0%
1720 Athlon 5150 4,313
+0%
1721 Celeron 3965Y 4,312
+-0%

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Singlecore Score

Single-core performance score for Athlon II X4 631 based on single-threaded benchmark results.

4,427 Rank: 1363
Rank Name Score Visual
1359 Core i5-2515E 4,429
+0%
1360 A9-9420 4,429
+0%
1361 Athlon X4 840 4,429
+0%
1362 FX-6120 4,427
+0%
1363 Athlon II X4 631 4,427
1364 Core i3-5010U 4,427
+0%
1365 A10 PRO-7800B 4,427
+0%
1366 Core i7-3540M 4,426
+-0%
1367 Celeron G1820T 4,424
-0.1%
1368 Core i5-660 4,423
-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 X4 631 based on integer math, floating point math, and prime number computation benchmarks.

-- Rank: --

Number Crunching score not yet available.

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Data Processing

Aggregated score for Athlon II X4 631 based on data encryption, data compression, and string sorting benchmarks.

-- Rank: --

Data Processing score not yet available.

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Physics & Compute

Aggregated score for Athlon II X4 631 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

-- Rank: --

Physics & Compute score not yet available.

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Athlon II X4 631 Details

Ranked #1428 of 2060 in overall performance, the AMD Athlon II X4 631 presents a modest computational footprint by modern standards. Its single-core score of 4427 places it at #1362, indicating relatively strong per-core efficiency, while its multicore score of 4313—ranking #1715—reflects limited scalability due to its aging architecture and limited core count. These benchmarks, though outdated, place the processor just behind contemporaries like the Core i5-2520M and A8-5600K, and only slightly ahead of low-power Intel Celeron and Pentium variants. As of March 2026, the Athlon II X4 631 is a relic from the early 2010s, having been launched in August 2011, and its performance is now far surpassed by current-generation CPUs. However, its relevance remains in legacy systems or budget builds where integrated graphics and cost are primary concerns.

The processor is based on AMD's Llano microarchitecture, fabricated on a 32 nm process by GlobalFoundries. It features a dual-core design with four threads via AMD-V virtualization, though it lacks simultaneous multithreading. Clock speeds reach up to 2.6 GHz, with a base frequency of 1.8 GHz and a turbo frequency of 2.7 GHz, although the latter appears to be a mislabeled specification given the processor's design. It operates at a 100 W TDP, which was considered high for its time, necessitating adequate cooling. The chip integrates 1 MB of L2 cache per core, totaling 2 MB, with a 122 MiB L1 cache, and supports dual-channel DDR3 memory up to 1866 MT/s with a maximum capacity of 32 GB.

Despite its age, the Athlon II X4 631 does not include integrated graphics, requiring a discrete GPU for visual output. This is a notable omission compared to other processors in its era that featured onboard graphics. It supports a range of instruction sets, including MMX, SSE, AVX2, AES, and AMD-V, enabling basic multimedia and virtualization tasks. However, it lacks modern features like SMT and advanced power-saving technologies. The processor uses a Socket FM1 interface, which was eventually phased out, further limiting its compatibility.

In today’s computing landscape, the Athlon II X4 631 serves as a historical benchmark. While it once competed in the mainstream desktop segment, its performance now falls far behind even mid-range modern CPUs. It remains suitable only for basic productivity tasks, light multimedia use, or systems where cost and legacy support outweigh performance demands. For users seeking more capable processing, even budget-tier modern alternatives offer superior efficiency and performance.
Frequently Compared

Intel Xeon E5-2686 v4 4 views

AMD Ryzen 5 3500X 3 views

AMD Ryzen Threadripper 2970WX 3 views

AMD Ryzen 9 PRO 3900 1 view

AMD Ryzen 5 PRO 3500U 1 view

AMD Ryzen 3 PRO 2200GE 1 view

Intel Xeon Silver 4116T 1 view

Intel Xeon Silver 4208 1 view

Intel Xeon Silver 4214 1 view

Intel Xeon Silver 4112 1 view

AMD Athlon II X4 631

Main Specifications

Designer: AMD
Name: Athlon II X4 631
Model Number: i5-3337U
Cores: 2
Threads: 4
Base Frequency: 1800 MHz
Clock Multiplier: 26x (locked)
Core Name: Llano
Socket: FCBGA1023
Package: µPGA
Target Segment: Desktop
Max CPUs: 1
TDP: 17 W

Cache Specifications

L1 Cache: 124.928 KiB
L2 Cache: 0.954 MiB

Memory Specifications

Supported Memory Type: DDR3/L/-RS 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: 1
PCIe Configuration: 1x16, 2x8, 1x8 2x4

Integrated Graphics

GPU: HD Graphics 4000
GPU Designer: Intel
GPU Max Frequency: 1100 MHz

Physical Specifications

Process: 22 nm
Die Area: 228 mm²
Manufacturer: GlobalFoundries
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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