Core Ultra 7 265 vs Core 2 Quad Q8400

Primary details

Comparing Core 2 Quad Q8400 and Core Ultra 7 265 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2281	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Power efficiency	1.30	no data
Architecture codename	Yorkfield (2007−2009)	Arrow Lake-S (2024−2025)
Release date	19 April 2009 (15 years ago)	January 2025

Detailed specifications

Core 2 Quad Q8400 and Core Ultra 7 265 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)	20 (Icosa-Core)
Threads	4	20
Base clock speed	2.66 GHz	2.4 GHz
Boost clock speed	0.67 GHz	5.3 GHz
Bus rate	1333 MHz	no data
L1 cache	64 KB (per core)	112 KB (per core)
L2 cache	4 MB (shared)	3 MB (per core)
L3 cache	0 KB	30 MB (shared)
Chip lithography	45 nm	3 nm
Die size	2x 82 mm2	243 mm2
Maximum case temperature (TCase)	71 °C	no data
Number of transistors	456 million	17,800 million
64 bit support	+	+
Windows 11 compatibility	-	no data
VID voltage range	0.85V-1.3625V	no data

Compatibility

Information on Core 2 Quad Q8400 and Core Ultra 7 265 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	FCLGA775,LGA775	1851
Power consumption (TDP)	95 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q8400 and Core Ultra 7 265. You'll probably need this information if you require some particular technology.

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

Security technologies

Core 2 Quad Q8400 and Core Ultra 7 265 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q8400 and Core Ultra 7 265 are enumerated here.

VT-d	no data	+
VT-x	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q8400 and Core Ultra 7 265. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

Arc Xe2 Graphics 64EU

Peripherals

Specifications and connection of peripherals supported by Core 2 Quad Q8400 and Core Ultra 7 265.

PCIe version	2.0	5.0
PCI Express lanes	no data	20

Pros & cons summary

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Physical cores	4	20
Threads	4	20
Chip lithography	45 nm	3 nm
Power consumption (TDP)	95 Watt	65 Watt

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Should you still have questions on choice between Core 2 Quad Q8400 and Core Ultra 7 265, ask them in Comments section, and we shall answer.

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