Intel Core i7-640UM

Details and Benchmarks for Intel Intel Core i7-640UM

Sysbuilds Alpha Stage!

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 Intel Core i7-640UM based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

3,997 Rank: 1891
Rank Name Score Visual
1887 A4-4300M 4,000
+0.1%
1888 Intel Core i3-380UM 3,999
+0.1%
1889 Pentium N3710 3,999
+0.1%
1890 E2-7110 3,998
+0%
1891 Intel Core i7-640UM 3,997
1892 Xeon L5520 3,997
+0%
1893 Celeron N3450 3,994
-0.1%
1894 A8-3520M 3,993
-0.1%
1895 Athlon 64 X2 4000+ 3,993
-0.1%
1896 A6-3410MX 3,992
-0.1%

View full ranking →

Multicore Score

Multicore performance score for Intel Core i7-640UM based on multi-threaded benchmark results.

4,050 Rank: 2052
Rank Name Score Visual
2048 Celeron 887 4,094
+1.1%
2049 Core 2 Quad Q6600 4,094
+1.1%
2050 A4-4300M 4,086
+0.9%
2051 Core 2 Duo E4500 4,062
+0.3%
2052 Intel Core i7-640UM 4,050
2053 Intel Core i7-820QM 4,035
-0.4%
2054 Athlon 64 X2 5200+ 4,029
-0.5%
2055 Athlon 64 X2 5000+ 4,017
-0.8%
2056 Core 2 Duo T9500 4,015
-0.9%
2057 Core 2 Duo E7400 4,011
-1%

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Singlecore Score

Single-core performance score for Intel Core i7-640UM based on single-threaded benchmark results.

3,961 Rank: 1787
Rank Name Score Visual
1783 Pentium N4200 3,966
+0.1%
1784 Celeron 1007U 3,965
+0.1%
1785 Phenom II X4 805 3,963
+0.1%
1786 Core 2 Duo T7600 3,962
+0%
1787 Intel Core i7-640UM 3,961
1788 Pentium 4405Y 3,960
+-0%
1789 Athlon 64 X2 6000+ 3,960
+-0%
1790 Celeron 2957U 3,958
-0.1%
1791 A10-7400P 3,957
-0.1%
1792 Core 2 Duo T7400 3,957
-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 Intel Core i7-640UM 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 Intel Core i7-640UM 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 Intel Core i7-640UM based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

-- Rank: --

Physics & Compute score not yet available.

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Intel Core i7-640UM Details

For users seeking a compact, power-efficient mobile processor with integrated graphics, the Intel Core i7-640UM offers a balanced solution designed for ultraportable systems. Released in the late 2000s, this processor is now considered outdated by modern standards, but it was built for a time when power efficiency and thermal constraints were critical in thin laptops. Based on Intel's Westmere microarchitecture and fabricated on a 32 nm process, the i7-640UM represents an evolution of the earlier Arrandale design, incorporating Intel's integrated GPU and advanced power-saving features.

The processor features a dual-core, quad-thread configuration, allowing it to handle multitasking and light productivity workloads effectively. With a base clock of 1.2 GHz and a turbo frequency reaching 2.27 GHz, it leverages Intel's Turbo Boost Technology 1.0 to dynamically increase performance under load. It includes 4 MiB of L3 cache and 0.5 MiB of L2 cache, providing a modest but functional cache hierarchy for its era. The integrated HD Graphics (Ironlake) GPU operates at up to 500 MHz, offering basic visual performance suitable for office applications, video playback, and light gaming. With a TDP of just 18 W, the i7-640UM is well-suited for low-power mobile platforms like the Calpella series.

In terms of supported features, the processor includes a range of technologies such as AES-NI, VT-x, EIST, and Intel VT-d, ensuring compatibility with virtualization and encryption tasks. It also supports ECC memory, although this may be limited in consumer implementations. Despite these capabilities, its overall performance today is significantly below modern benchmarks. In the current evaluation, the i7-640UM achieves a single-core score of 3961, a multicore score of 4050, and an overall score of 3997, placing it near the bottom of the ranking—specifically at #1891 out of 2060 processors. Its multicore performance is particularly weak, ranking #2052, and it trails behind even older CPUs like the Core 2 Duo E4500.

As of March 2026, the Intel Core i7-640UM is best suited for legacy systems or niche use cases where low power consumption and basic computing are prioritized over raw performance. While it was once a competitive option for mobile productivity, it now serves as a historical example of Intel's efforts to balance performance and efficiency in the pre-Haswell era.
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Intel Intel Core i7-640UM

Main Specifications

Designer: Intel
Name: Intel Core i7-640UM
Family: Core
Series: i7-600
Model Number: i7-640UM
Cores: 2
Threads: 4
Base Frequency: 1199.99 MHz
Turbo Frequency (1 core): 2266.66 MHz
Turbo Frequency (2 cores): 1866.66 MHz
Clock Multiplier: 9x (locked)
Microarchitecture: Westmere
Core Name: Arrandale
Core Family: 6
Core Model: 37
Package: BGA-1288
Chipset: Ibex
Target Segment: Mobile
Max CPUs: 1
TDP: 18 W
Release Price: $305.00

Cache Specifications

L1 Cache: 128 KiB
L1 Instruction Cache: 64 KiB (4-way set associative)
L1 Data Cache: 64 KiB (8-way set associative)
L2 Cache: 0.5 MiB (8-way set associative)
L3 Cache: 4 MiB (16-way set associative)

Memory Specifications

Supported Memory Type: DDR3-800
Memory Channels: 2
Maximum Memory: 8 GB
Maximum Bandwidth: 11.92 GB/s
ECC Support: No

Integrated Graphics

GPU: HD
GPU Designer: Intel
GPU Max Frequency: 500 MHz
Execution Units: 12

Physical Specifications

Process: 32 nm
Die Area: 81 mm²
Transistor Count: 0.38 billion
Manufacturer: Intel
Technology: CMOS
Word Size: 64-bit
ISA: x86-64 (x86)

CPU Features

MMX EMMX SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AES x86-16 x86-32 x86-64 Real Protected SMM FPU NX HT EIST TXT vPro VT-x VT-d EPT Flex Memory TBT 1.0 FMA
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