Celeron E1400 vs i7-640LM

Place in the ranking	2501	2935
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Desktop processor
Series	Intel Core i7	no data
Power efficiency	3.62	0.67
Architecture codename	Arrandale (2010−2011)	Allendale (2006−2009)
Release date	7 January 2010 (14 years ago)	April 2008 (16 years ago)
Launch price (MSRP)	$332	$57

Detailed specifications

Core i7-640LM and Celeron E1400 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	2 (Dual-core)	2 (Dual-core)
Threads	4	2
Base clock speed	2.13 GHz	2 GHz
Boost clock speed	2.93 GHz	2 GHz
Bus type	DMI 1.0	no data
Bus rate	1 × 2.5 GT/s	no data
Multiplier	16	no data
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	512 KB (shared)
L3 cache	4 MB (shared)	0 KB
Chip lithography	32 nm	65 nm
Die size	81+177 mm²	77 mm²
Maximum core temperature	105 °C	73 °C
Number of transistors	382+177 Million	105 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	no data	0.85V-1.5V

Compatibility

Information on Core i7-640LM and Celeron E1400 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1 (Uniprocessor)	1
Socket	BGA1288	LGA775
Power consumption (TDP)	25 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-640LM and Celeron E1400. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	no data
AES-NI	+	-
FMA	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	+	-
Hyper-Threading Technology	+	-
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	no data
Demand Based Switching	no data	-
PAE	36 Bit	no data
FDI	+	no data
Fast Memory Access	+	no data
FSB parity	no data	-

Security technologies

Core i7-640LM and Celeron E1400 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-640LM and Celeron E1400 are enumerated here.

VT-d	+	-
VT-x	+	-
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-640LM and Celeron E1400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3-800, DDR3-1066	DDR1, DDR2, DDR3
Maximum memory size	8 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	17.051 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics for Previous Generation Intel Processors	no data
Clear Video	+	no data
Clear Video HD	+	no data
Graphics max frequency	566 MHz	no data

Graphics interfaces

Available interfaces and connections of Core i7-640LM and Celeron E1400 integrated GPUs.

Number of displays supported

no data

Peripherals

Specifications and connection of peripherals supported by Core i7-640LM and Celeron E1400.

PCIe version	2.0	no data
PCI Express lanes	16	no data

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

i7-640LM 0.96
+109%

Celeron E1400 0.46

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i7-640LM 1531
+108%

Celeron E1400 735

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i7-640LM 371
+68.6%

Celeron E1400 220

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i7-640LM 686
+75%

Celeron E1400 392

Gaming performance

Pros & cons summary

Performance score	0.96	0.46
Threads	4	2
Chip lithography	32 nm	65 nm
Power consumption (TDP)	25 Watt	65 Watt

i7-640LM has a 108.7% higher aggregate performance score, 100% more threads, a 103.1% more advanced lithography process, and 160% lower power consumption.

The Core i7-640LM is our recommended choice as it beats the Celeron E1400 in performance tests.

Be aware that Core i7-640LM is a notebook processor while Celeron E1400 is a desktop one.

Should you still have questions on choice between Core i7-640LM and Celeron E1400, ask them in Comments section, and we shall answer.