i7-1255U vs Pentium M 765

Place in the ranking	3197	896
Place by popularity	not in top-100	77
Market segment	Laptop	Laptop
Series	Pentium M	Intel Alder Lake-M
Power efficiency	0.99	53.85
Architecture codename	Dothan (2004−2005)	Alder Lake-U (2022)
Release date	20 October 2004 (20 years ago)	23 February 2022 (2 years ago)

Detailed specifications

Pentium M 765 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	1 (Single-Core)	10 (Deca-Core)
Threads	1	12
Base clock speed	2.1 GHz	1.7 GHz
Boost clock speed	2.1 GHz	4.7 GHz
Bus rate	400 MHz	no data
L1 cache	32 KB	80K (per core)
L2 cache	2 MB	1.25 MB (per core)
L3 cache	0 KB	12 MB (shared)
Chip lithography	90 nm	10 nm
Die size	87 mm²	no data
Maximum core temperature	100 °C	100 °C
Number of transistors	144 million	no data
64 bit support	-	+
Windows 11 compatibility	-	+
VID voltage range	0.988-1.356V	no data

Compatibility

Information on Pentium M 765 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	1
Socket	PPGA478, H-PBGA479	Intel BGA 1744
Power consumption (TDP)	7.5 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium M 765 and Core i7-1255U. You'll probably need this information if you require some particular technology.

AES-NI	-	+
FMA	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
TSX	-	+
Idle States	-	no data
Demand Based Switching	-	no data
PAE	32 Bit	no data
FSB parity	-	no data

Security technologies

Pentium M 765 and Core i7-1255U technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium M 765 and Core i7-1255U are enumerated here.

VT-d	no data	+
VT-x	-	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium M 765 and Core i7-1255U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR2

DDR4, DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

Intel Iris Xe Graphics G7 96EUs ( - 1250 MHz)

Peripherals

Specifications and connection of peripherals supported by Pentium M 765 and Core i7-1255U.

PCIe version	no data	4.0
PCI Express lanes	no data	20

Gaming performance

Pros & cons summary

Performance score	0.22	8.53
Recency	20 October 2004	23 February 2022
Physical cores	1	10
Threads	1	12
Chip lithography	90 nm	10 nm
Power consumption (TDP)	7 Watt	15 Watt

Pentium M 765 has 114.3% lower power consumption.

i7-1255U, on the other hand, has a 3777.3% higher aggregate performance score, an age advantage of 17 years, 900% more physical cores and 1100% more threads, and a 800% more advanced lithography process.

The Core i7-1255U is our recommended choice as it beats the Pentium M 765 in performance tests.

Should you still have questions on choice between Pentium M 765 and Core i7-1255U, ask them in Comments section, and we shall answer.