Core i7-660UE vs Core 2 Extreme X7900

Primary details

Comparing Core 2 Extreme X7900 and Core i7-660UE processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2724	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core 2 Extreme	Intel Core i7
Power efficiency	1.50	no data
Architecture codename	Merom (2006−2008)	Arrandale (2010−2011)
Release date	1 September 2007 (17 years ago)	2 August 2010 (14 years ago)
Launch price (MSRP)	$851	$301

Detailed specifications

Core 2 Extreme X7900 and Core i7-660UE 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	2 (Dual-core)	2 (Dual-core)
Threads	2	4
Base clock speed	2.8 GHz	1.33 GHz
Boost clock speed	2.8 GHz	2.4 GHz
Bus type	no data	DMI 1.0
Bus rate	800 MHz	1 × 2.5 GT/s
Multiplier	no data	10
L1 cache	128 KB	64 KB (per core)
L2 cache	4 MB	256 KB (per core)
L3 cache	0 KB	4 MB (shared)
Chip lithography	65 nm	32 nm
Die size	143 mm2	81 mm2
Maximum core temperature	100 °C	105 °C
Number of transistors	no data	382 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	1.1V-1.375V	no data

Compatibility

Information on Core 2 Extreme X7900 and Core i7-660UE 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 (Uniprocessor)
Socket	PPGA478	BGA1288
Power consumption (TDP)	44 Watt	18 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Extreme X7900 and Core i7-660UE. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® SSE4.1, Intel® SSE4.2
AES-NI	-	+
FMA	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	1.0
Hyper-Threading Technology	-	+
Idle States	-	+
Thermal Monitoring	-	+
Flex Memory Access	no data	+
Demand Based Switching	-	no data
PAE	no data	36 Bit
FDI	no data	+
Fast Memory Access	no data	+
AMT	+	no data
FSB parity	-	no data

Security technologies

Core 2 Extreme X7900 and Core i7-660UE 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 X7900 and Core i7-660UE are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme X7900 and Core i7-660UE. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1	DDR3-800
Maximum memory size	no data	8.79 GB
Max memory channels	no data	2
Maximum memory bandwidth	no data	12.799 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel HD Graphics for Previous Generation Intel Processors
Clear Video	no data	+
Clear Video HD	no data	+
Graphics max frequency	no data	500 MHz

Graphics interfaces

Available interfaces and connections of Core 2 Extreme X7900 and Core i7-660UE integrated GPUs.

Number of displays supported

no data

2

Peripherals

Specifications and connection of peripherals supported by Core 2 Extreme X7900 and Core i7-660UE.

PCIe version	no data	2.0
PCI Express lanes	no data	16

Pros & cons summary

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Recency	1 September 2007	2 August 2010
Threads	2	4
Chip lithography	65 nm	32 nm
Power consumption (TDP)	44 Watt	18 Watt

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