Core i3-11100B vs Core 2 Quad Q9400

Place in the ranking	2241	987
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Laptop
Power efficiency	1.33	10.41
Architecture codename	Yorkfield (2007−2009)	no data
Release date	August 2008 (16 years ago)	1 April 2021 (3 years ago)

Detailed specifications

Core 2 Quad Q9400 and Core i3-11100B 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)	4 (Quad-Core)
Threads	4	8
Base clock speed	2.66 GHz	3.6 GHz
Boost clock speed	2.67 GHz	4.4 GHz
Bus rate	1333 MHz	8 GT/s
L1 cache	64K (per core)	no data
L2 cache	6 MB (shared)	no data
L3 cache	0 KB	12 MB
Chip lithography	45 nm	10 nm SuperFin
Die size	2x 81 mm²	no data
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	71 °C	no data
Number of transistors	456 million	no data
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	0.85V-1.3625V	no data

Compatibility

Information on Core 2 Quad Q9400 and Core i3-11100B 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	no data
Power consumption (TDP)	95 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q9400 and Core i3-11100B. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	-	+
vPro	no data	-
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	no data	+
SIPP	-	+
Demand Based Switching	-	no data
Turbo Boost Max 3.0	no data	+
FSB parity	-	no data
Deep Learning Boost	-	+

Security technologies

Core 2 Quad Q9400 and Core i3-11100B technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+
Secure Key	no data	+
Identity Protection	-	+
SGX	no data	Yes with Intel® ME
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q9400 and Core i3-11100B are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q9400 and Core i3-11100B. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	Up to 3200 MT/s
Maximum memory size	no data	128 GB
Max memory channels	no data	2
Maximum memory bandwidth	no data	45.8 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel® UHD Graphics for 11th Gen Intel® Processors
Quick Sync Video	-	+
Graphics max frequency	no data	1.4 GHz
Execution Units	no data	16

Graphics interfaces

Available interfaces and connections of Core 2 Quad Q9400 and Core i3-11100B integrated GPUs.

Number of displays supported	no data	4
eDP	no data	+
DisplayPort	-	+
HDMI	-	+
DVI	no data	+

Graphics image quality

Maximum display resolutions supported by Core 2 Quad Q9400 and Core i3-11100B integrated GPUs, including resolutions over different interfaces.

4K resolution support	no data	+
Max resolution over HDMI 1.4	no data	4096 x 2304@30Hz
Max resolution over eDP	no data	4096 x 2304@60Hz
Max resolution over DisplayPort	no data	4096 x 2304@60Hz

Graphics API support

APIs supported by Core 2 Quad Q9400 and Core i3-11100B integrated GPUs, sometimes API versions are included.

DirectX	no data	12
OpenGL	no data	4.5

Peripherals

Specifications and connection of peripherals supported by Core 2 Quad Q9400 and Core i3-11100B.

PCIe version	no data	3.0
PCI Express lanes	no data	16

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.

Core 2 Quad Q9400 1.34

i3-11100B 7.15
+434%

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.

Core 2 Quad Q9400 2133

i3-11100B 11357
+432%

Gaming performance

Pros & cons summary

Performance score	1.34	7.15
Threads	4	8
Chip lithography	45 nm	10 nm
Power consumption (TDP)	95 Watt	65 Watt

i3-11100B has a 433.6% higher aggregate performance score, 100% more threads, a 350% more advanced lithography process, and 46.2% lower power consumption.

The Core i3-11100B is our recommended choice as it beats the Core 2 Quad Q9400 in performance tests.

Note that Core 2 Quad Q9400 is a desktop processor while Core i3-11100B is a notebook one.

Should you still have questions on choice between Core 2 Quad Q9400 and Core i3-11100B, ask them in Comments section, and we shall answer.