i7-2655QM vs i7-975

Primary details

Comparing Core i7-975 and Core i7-2655QM processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1846	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.12	no data
Market segment	Desktop processor	Laptop
Series	Core i7 (Desktop)	Intel Core i7
Power efficiency	1.59	no data
Architecture codename	Bloomfield (2008−2010)	Sandy Bridge (2011−2013)
Release date	2 June 2009 (15 years ago)	4 September 2011 (13 years ago)
Launch price (MSRP)	$476	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-975 and Core i7-2655QM 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	8	8
Base clock speed	3.33 GHz	no data
Boost clock speed	3.6 GHz	2.1 GHz
Bus type	no data	DMI 2.0
Bus rate	1333 MHz	4 × 5 GT/s
Multiplier	no data	21
L1 cache	64 KB (per core)	256 KB
L2 cache	256 KB (per core)	1 MB
L3 cache	8 MB (shared)	6 MB
Chip lithography	45 nm	32 nm
Die size	263 mm2	216 mm2
Maximum case temperature (TCase)	68 °C	no data
Number of transistors	731 million	1160 Million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-

Compatibility

Information on Core i7-975 and Core i7-2655QM 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	FCLGA1366	no data
Power consumption (TDP)	130 Watt	45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-975 and Core i7-2655QM. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	no data
AES-NI	-	+
FMA	-	+
AVX	-	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Demand Based Switching	-	no data
PAE	36 Bit	no data

Security technologies

Core i7-975 and Core i7-2655QM 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 i7-975 and Core i7-2655QM 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 i7-975 and Core i7-2655QM. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	no data
Maximum memory size	24 GB	16 GB
Max memory channels	3	no data
Maximum memory bandwidth	25.6 GB/s	21.335 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

Intel HD Graphics 3000

Peripherals

Specifications and connection of peripherals supported by Core i7-975 and Core i7-2655QM.

PCIe version

2.0

no data

Pros & cons summary

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Recency	2 June 2009	4 September 2011
Chip lithography	45 nm	32 nm
Power consumption (TDP)	130 Watt	45 Watt

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