Pentium Dual-Core E2140 vs Pentium 4 2.66

Place in the ranking	3384	3073
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Power efficiency	0.09	0.49
Architecture codename	Northwood (2002−2004)	Allendale (2006−2009)
Release date	August 2002 (22 years ago)	June 2007 (17 years ago)

Detailed specifications

Pentium 4 2.66 and Pentium Dual-Core E2140 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	1 (Single-Core)	2 (Dual-core)
Threads	1	2
Boost clock speed	2.66 GHz	1.6 GHz
L1 cache	8 KB	64 KB (per core)
L2 cache	512 KB	1 MB (shared)
L3 cache	0 KB	0 KB
Chip lithography	130 nm	65 nm
Die size	146 mm²	77 mm²
Number of transistors	55 million	105 million
64 bit support	-	+
Windows 11 compatibility	-	-

Compatibility

Information on Pentium 4 2.66 and Pentium Dual-Core E2140 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	1
Socket	478	775
Power consumption (TDP)	110 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium 4 2.66 and Pentium Dual-Core E2140. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)

no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium 4 2.66 and Pentium Dual-Core E2140. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2

DDR1, DDR2, DDR3

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.

Pentium 4 2.66 0.10

Pentium Dual-Core E2140 0.34
+240%

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.

Pentium 4 2.66 157

Pentium Dual-Core E2140 539
+243%

Gaming performance

Pros & cons summary

Performance score	0.10	0.34
Physical cores	1	2
Threads	1	2
Chip lithography	130 nm	65 nm
Power consumption (TDP)	110 Watt	65 Watt

Pentium Dual-Core E2140 has a 240% higher aggregate performance score, 100% more physical cores and 100% more threads, a 100% more advanced lithography process, and 69.2% lower power consumption.

The Pentium Dual-Core E2140 is our recommended choice as it beats the Pentium 4 2.66 in performance tests.

Should you still have questions on choice between Pentium 4 2.66 and Pentium Dual-Core E2140, ask them in Comments section, and we shall answer.