Core i7-1255U vs Core i7-2655QM

Primary details

Comparing Core i7-2655QM and Core i7-1255U processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	not rated	782
Place by popularity	not in top-100	50
Market segment	Laptop	Laptop
Series	Intel Core i7	Intel Alder Lake-M
Architecture codename	Sandy Bridge (2011−2013)	Alder Lake-U (2022)
Release date	4 September 2011 (12 years ago)	23 February 2022 (2 years ago)

Detailed specifications

Core i7-2655QM and Core i7-1255U 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)	10 (Deca-Core)
Threads	8	12
Base clock speed	no data	1.7 GHz
Boost clock speed	2.1 GHz	4.7 GHz
Bus support	4 × 5 GT/s	no data
L1 cache	256 KB	80K (per core)
L2 cache	1 MB	1.25 MB (per core)
L3 cache	6 MB	12 MB (shared)
Chip lithography	32 nm	Intel 7 nm
Die size	216 mm2	no data
Maximum core temperature	no data	100 °C
Number of transistors	1160 Million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	No	No

Compatibility

Information on Core i7-2655QM and Core i7-1255U 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 (Uniprocessor)	1
Socket	no data	FCBGA1744
Power consumption (TDP)	45 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-2655QM and Core i7-1255U. 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	+	+
FMA	+	+
AVX	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Hyper-Threading Technology	no data	+
TSX	no data	+
Thermal Monitoring	no data	+
Flex Memory Access	no data	+
Status	no data	Launched

Security technologies

Core i7-2655QM and Core i7-1255U technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-2655QM and Core i7-1255U are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-2655QM and Core i7-1255U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	no data	DDR4, DDR5
Maximum memory size	16 GB	64 GB
Max memory channels	no data	2
Maximum memory bandwidth	21.335 GB/s	no data
ECC memory support	no data	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics 3000	Intel® Iris® Xe Graphics eligible
Quick Sync Video	no data	+
Graphics max frequency	no data	1.25 GHz
Execution Units	no data	96

Graphics interfaces

Available interfaces and connections of Core i7-2655QM and Core i7-1255U integrated GPUs.

Number of displays supported

no data

4

Graphics image quality

Maximum display resolutions supported by Core i7-2655QM and Core i7-1255U integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	no data	4096 x 2304 @ 60Hz
Max resolution over eDP	no data	4096 x 2304 @ 120Hz
Max resolution over DisplayPort	no data	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Core i7-2655QM and Core i7-1255U integrated GPUs, sometimes API versions are included.

DirectX	no data	12.1
OpenGL	no data	4.6

Peripherals

Specifications and connection of peripherals supported by Core i7-2655QM and Core i7-1255U.

PCIe version	no data	4.0
PCI Express lanes	no data	20

Pros & cons summary

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Recency	4 September 2011	23 February 2022
Physical cores	4	10
Threads	8	12
Power consumption (TDP)	45 Watt	15 Watt

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