Core 2 Duo E8400 vs Core 2 Extreme QX6800

Primary details

Comparing Core 2 Extreme QX6800 and Core 2 Duo E8400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	2685
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Power efficiency	no data	1.06
Architecture codename	Kentsfield (2007)	Wolfdale (2008−2010)
Release date	April 2007 (17 years ago)	1 January 2008 (16 years ago)

Detailed specifications

Core 2 Extreme QX6800 and Core 2 Duo E8400 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)	2 (Dual-core)
Threads	4	2
Base clock speed	2.93 GHz	3 GHz
Boost clock speed	2.93 GHz	3 GHz
Bus rate	1066 MHz	1333 MHz
L1 cache	64K (per core)	64 KB (per core)
L2 cache	8 MB (shared)	6 MB (shared)
L3 cache	0 KB	0 KB
Chip lithography	65 nm	45 nm
Die size	2x 143 mm2	104 mm2
Maximum core temperature	65 °C	no data
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	582 million	410 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-
VID voltage range	0.85V-1.5V	0.85V-1.3625V

Compatibility

Information on Core 2 Extreme QX6800 and Core 2 Duo E8400 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	LGA775
Power consumption (TDP)	130 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Extreme QX6800 and Core 2 Duo E8400. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	-
Hyper-Threading Technology	-	-
Idle States	+	+
Thermal Monitoring	+	+
Demand Based Switching	-	-
FSB parity	-	-

Security technologies

Core 2 Extreme QX6800 and Core 2 Duo E8400 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Extreme QX6800 and Core 2 Duo E8400 are enumerated here.

VT-d	no data	+
VT-x	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme QX6800 and Core 2 Duo E8400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

DDR1, DDR2, DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

On certain motherboards (Chipset feature)

Peripherals

Specifications and connection of peripherals supported by Core 2 Extreme QX6800 and Core 2 Duo E8400.

PCIe version

no data

2.0

Pros & cons summary

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Physical cores	4	2
Threads	4	2
Chip lithography	65 nm	45 nm
Power consumption (TDP)	130 Watt	65 Watt

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Should you still have questions on choice between Core 2 Extreme QX6800 and Core 2 Duo E8400, ask them in Comments section, and we shall answer.

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