Phenom II X4 840

Details and Benchmarks for AMD Phenom II X4 840

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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 X4 840 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,404 Rank: 1395
Rank Name Score Visual
1391 Core M 5Y70 4,405
+0%
1392 Core i3-5015U 4,405
+0%
1393 Core i5-760 4,405
+0%
1394 Phenom II X4 B60 4,404
+0%
1395 Phenom II X4 840 4,404
1396 Celeron G1820T 4,404
+0%
1397 Intel Core i5-540M 4,403
+-0%
1398 Core i3-3120M 4,402
+-0%
1399 Core i3 540 4,400
-0.1%
1400 Xeon X5450 4,400
-0.1%

View full ranking →

Multicore Score

Multicore performance score for Phenom II X4 840 based on multi-threaded benchmark results.

4,514 Rank: 1201
Rank Name Score Visual
1197 Core i3-7130U 4,517
+0.1%
1198 Core i3-4130T 4,516
+0%
1199 Core i3-4130 4,515
+0%
1200 Phenom II X4 975 4,515
+0%
1201 Phenom II X4 840 4,514
1202 Xeon W5590 4,513
+-0%
1203 Core i7-2655LE 4,512
+-0%
1204 Phenom II X4 850 4,512
+-0%
1205 Xeon E5520 4,511
-0.1%
1206 Core i5-3570S 4,511
-0.1%

View full ranking →

Singlecore Score

Single-core performance score for Phenom II X4 840 based on single-threaded benchmark results.

4,330 Rank: 1464
Rank Name Score Visual
1460 A9-9425 4,335
+0.1%
1461 Intel Core i7-740QM 4,333
+0.1%
1462 Core i5-3317U 4,332
+0%
1463 Pentium E5700 4,332
+0%
1464 Phenom II X4 840 4,330
1465 Phenom II X4 840T 4,330
+0%
1466 Core 2 Quad Q9650 4,328
+-0%
1467 A12-9720P 4,326
-0.1%
1468 Core 2 Duo E8500 4,326
-0.1%
1469 A8-5500B 4,324
-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 Phenom II X4 840 based on integer math, floating point math, and prime number computation benchmarks.

4,530 Rank: 1304
Rank Name Score Visual
1300 Xeon X3220 4,531
+0%
1301 Core i5-2390T 4,531
+0%
1302 Core i7-2640M 4,530
+0%
1303 Core i7-2620M 4,530
+0%
1304 Phenom II X4 840 4,530
1305 Core i5-5250U 4,530
+0%
1306 A10-5745M 4,530
+0%
1307 Core M3-7Y32 4,529
+-0%
1308 Core i3-6100U 4,529
+-0%
1309 Celeron N4100 4,529
+-0%

View full ranking →

Data Processing

Aggregated score for Phenom II X4 840 based on data encryption, data compression, and string sorting benchmarks.

4,544 Rank: 1082
Rank Name Score Visual
1078 Phenom II X4 B97 4,545
+0%
1079 Core i3-7100T 4,544
+0%
1080 Core i3-4160 4,544
+0%
1081 Phenom II X4 B50 4,544
+0%
1082 Phenom II X4 840 4,544
1083 Core i3-4340 4,543
+-0%
1084 A10-6790K 4,543
+-0%
1085 A8-7670K 4,543
+-0%
1086 Athlon II X4 555 4,543
+-0%
1087 Phenom II X4 955 4,543
+-0%

View full ranking →

Physics & Compute

Aggregated score for Phenom II X4 840 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,508 Rank: 1348
Rank Name Score Visual
1344 Pentium 4415U 4,509
+0%
1345 Core i3-4010U 4,509
+0%
1346 Phenom II X4 900e 4,509
+0%
1347 Pentium 4405U 4,508
+0%
1348 Phenom II X4 840 4,508
1349 Pentium 4417U 4,508
+0%
1350 A12-9700P 4,508
+0%
1351 Phenom II X4 905e 4,508
+0%
1352 A10-9600P 4,508
+0%
1353 Core i3-4005U 4,508
+0%

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Phenom II X4 840 Details

The AMD Phenom II X4 840, launched in January 2011, represents a mid-range desktop processor from AMD's early 2010s lineup. Built on the Propus microarchitecture and fabricated on a 45 nm process by GlobalFoundries, this quad-core CPU was designed for Socket AM3 systems and targeted users seeking a balance of performance and cost. Despite being over a decade old, it remains notable for its integrated graphics capabilities and support for ECC memory, a feature uncommon in consumer-grade processors. As of March 2026, the Phenom II X4 840 is a legacy part, no longer in production, but still relevant for understanding the evolution of multi-core desktop computing.

The processor features four cores with a base clock of 3.2 GHz and a turbo frequency of 3.2 GHz, though the provided data lists a base clock of 1.8 GHz, which appears to be an error. It operates at a 16x multiplier and supports dual-channel DDR3 memory at speeds up to 1333 MT/s, with a maximum memory capacity of 16 GB. The L2 cache totals 512 KB per core, and the L1 cache is 0.122 MiB, contributing to its overall memory hierarchy. The CPU is packaged in a µPGA format and uses a 1200 MHz bus speed, with a TDP of 95 W, indicating a relatively high power draw that necessitates adequate cooling.

Integrated graphics are not built into the Phenom II X4 840; however, certain motherboards with compatible chipsets can provide graphics support through shared memory. The processor supports a range of instruction sets, including SSE, AVX2, AES-NI, and AMD-V, enabling efficient virtualization and encryption tasks. It also includes technologies such as EIST for power management and supports Hyper-Threading via SMT, allowing each core to handle two threads simultaneously.

In benchmark testing, the Phenom II X4 840 achieves an Overall Score of 4404, ranking #1394 out of 2060 processors. Its Singlecore Score is 4330, placing it #1464, while its Multicore Score is 4514, ranking #1201. These results place it behind modern CPUs like the Core i3-4130 and Phenom II X4 975, but ahead of older processors such as the Xeon W5590 and Core i3-7130U. The processor's strongest performance category is multicore, where it outperforms several current-generation low-power mobile CPUs, while its single-core performance is relatively modest compared to contemporary offerings.

Given its age and specifications, the Phenom II X4 840 is best suited for basic desktop computing, light multitasking, and legacy system upgrades. Its high TDP and lack of modern features such as DDR4 support or PCIe 4.0 limit its relevance in today’s market. However, for users maintaining older systems or engaging in non-demanding workloads, it remains a viable option. As of 2026, the Phenom II X4 840 serves as a historical benchmark of AMD’s efforts to compete in the quad-core desktop space during the early years of the 2010s.
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AMD Phenom II X4 840

Main Specifications

Designer: AMD
Name: Phenom II X4 840
Model Number: i7-4500U
Cores: 2
Threads: 4
Base Frequency: 1800 MHz
Clock Multiplier: 16x (locked)
Core Name: Propus
Socket: FCBGA1168
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: DDR3L 1333/1600, LPDDR3 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 4400
GPU Designer: Intel
GPU Max Frequency: 1100 MHz

Physical Specifications

Process: 22 nm
Die Area: 169 mm²
Transistor Count: 0.00 billion
Manufacturer: GlobalFoundries
Word Size: 64-bit

CPU Features

MMX SSE SSE2 SSE3 SSE4.1 SSE4.2 AVX2 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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