Xeon E-2456 vs Core 2 Quad Q9400s

Primary details

Comparing Core 2 Quad Q9400s and Xeon E-2456 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	471
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	93.01
Market segment	Desktop processor	Server
Power efficiency	no data	17.71
Architecture codename	Yorkfield (2007−2009)	Raptor Lake-S (2023−2024)
Release date	18 January 2009 (15 years ago)	14 December 2023 (less than a year ago)
Launch price (MSRP)	no data	$375

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core 2 Quad Q9400s and Xeon E-2456 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)	6 (Hexa-Core)
Threads	4	12
Base clock speed	2.66 GHz	3.3 GHz
Boost clock speed	0.67 GHz	5.1 GHz
Bus rate	1333 MHz	16 GT/s
L1 cache	64 KB (per core)	80 KB (per core)
L2 cache	6 MB (shared)	1.25 MB (per core)
L3 cache	0 KB	18 MB (shared)
Chip lithography	45 nm	Intel 7 nm
Die size	2x 82 mm2	163 mm2
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	76 °C	no data
Number of transistors	456 million	no data
64 bit support	+	+
Windows 11 compatibility	-	no data
VID voltage range	0.85V-1.3625V	no data

Compatibility

Information on Core 2 Quad Q9400s and Xeon E-2456 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	FCLGA1700
Power consumption (TDP)	65 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q9400s and Xeon E-2456. 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	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	2
Hyper-Threading Technology	-	+
Idle States	+	+
Thermal Monitoring	+	+
Demand Based Switching	-	no data
Turbo Boost Max 3.0	no data	-
FSB parity	-	no data

Security technologies

Core 2 Quad Q9400s and Xeon E-2456 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	no data	+
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q9400s and Xeon E-2456 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 Q9400s and Xeon E-2456. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	DDR5-4800
Maximum memory size	no data	128 GB
Max memory channels	no data	2
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

N/A

Peripherals

Specifications and connection of peripherals supported by Core 2 Quad Q9400s and Xeon E-2456.

PCIe version	2.0	5
PCI Express lanes	no data	16

Pros & cons summary

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Recency	18 January 2009	14 December 2023
Physical cores	4	6
Threads	4	12
Power consumption (TDP)	65 Watt	80 Watt

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Should you still have questions on choice between Core 2 Quad Q9400s and Xeon E-2456, ask them in Comments section, and we shall answer.

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