Pentium 4 2.66 vs Core 2 Quad Q9400

Primary details

Comparing Core 2 Quad Q9400 and Pentium 4 2.66 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2239	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Power efficiency	1.33	no data
Architecture codename	Yorkfield (2007−2009)	Northwood (2002−2004)
Release date	August 2008 (16 years ago)	August 2002 (22 years ago)

Detailed specifications

Core 2 Quad Q9400 and Pentium 4 2.66 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	4 (Quad-Core)	1 (Single-Core)
Threads	4	1
Base clock speed	2.66 GHz	no data
Boost clock speed	2.67 GHz	2.66 GHz
Bus rate	1333 MHz	no data
L1 cache	64K (per core)	8 KB
L2 cache	6 MB (shared)	512 KB
L3 cache	0 KB	0 KB
Chip lithography	45 nm	130 nm
Die size	2x 81 mm2	146 mm2
Maximum case temperature (TCase)	71 °C	no data
Number of transistors	456 million	55 million
64 bit support	+	-
Windows 11 compatibility	-	-
VID voltage range	0.85V-1.3625V	no data

Compatibility

Information on Core 2 Quad Q9400 and Pentium 4 2.66 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	LGA775	478
Power consumption (TDP)	95 Watt	110 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q9400 and Pentium 4 2.66. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	-	no data
FSB parity	-	no data

Security technologies

Core 2 Quad Q9400 and Pentium 4 2.66 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q9400 and Pentium 4 2.66 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q9400 and Pentium 4 2.66. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

DDR1, DDR2

Synthetic benchmark performance

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

---

---

Pros & cons summary

---

Physical cores	4	1
Threads	4	1
Chip lithography	45 nm	130 nm
Power consumption (TDP)	95 Watt	110 Watt

---

Should you still have questions on choice between Core 2 Quad Q9400 and Pentium 4 2.66, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---