Xeon Silver 4509Y vs i7-1255U

Primary details

Comparing Core i7-1255U and Xeon Silver 4509Y processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	884	not rated
Place by popularity	78	not in top-100
Market segment	Laptop	Server
Series	Intel Alder Lake-M	no data
Power efficiency	53.88	no data
Architecture codename	Alder Lake-U (2022)	Sapphire Rapids (2023−2024)
Release date	23 February 2022 (2 years ago)	14 December 2023 (less than a year ago)
Launch price (MSRP)	no data	$563

Detailed specifications

Core i7-1255U and Xeon Silver 4509Y 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	10 (Deca-Core)	8 (Octa-Core)
Threads	12	16
Base clock speed	1.7 GHz	2.6 GHz
Boost clock speed	4.7 GHz	4.1 GHz
L1 cache	80K (per core)	80 KB (per core)
L2 cache	1.25 MB (per core)	2 MB (per core)
L3 cache	12 MB (shared)	22.5 MB (shared)
Chip lithography	Intel 7 nm	Intel 7 nm
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	no data	84 °C
64 bit support	+	+
Windows 11 compatibility	+	no data

Compatibility

Information on Core i7-1255U and Xeon Silver 4509Y 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	2
Socket	FCBGA1744	FCLGA4677
Power consumption (TDP)	15 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-1255U and Xeon Silver 4509Y. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® AMX, Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512
AES-NI	+	+
FMA	+	-
AVX	+	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	+	+
Turbo Boost Technology	no data	2.0
Hyper-Threading Technology	+	+
TSX	+	+
Thermal Monitoring	+	-
Flex Memory Access	+	no data
Deep Learning Boost	+	+

Security technologies

Core i7-1255U and Xeon Silver 4509Y technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	no data
SGX	no data	Yes with Intel® SPS
OS Guard	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-1255U and Xeon Silver 4509Y are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-1255U and Xeon Silver 4509Y. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4, DDR5	DDR5 @ 4400 MT/s (1 DPC &2DPC)
Maximum memory size	64 GB	4 TB
Max memory channels	2	8
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® Iris® Xe Graphics eligible	N/A
Quick Sync Video	+	-
Graphics max frequency	1.25 GHz	no data
Execution Units	96	no data

Graphics interfaces

Available interfaces and connections of Core i7-1255U and Xeon Silver 4509Y integrated GPUs.

Number of displays supported

4

no data

Graphics image quality

Maximum display resolutions supported by Core i7-1255U and Xeon Silver 4509Y integrated GPUs, including resolutions over different interfaces.

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

Graphics API support

APIs supported by Core i7-1255U and Xeon Silver 4509Y integrated GPUs, sometimes API versions are included.

DirectX	12.1	no data
OpenGL	4.6	no data

Peripherals

Specifications and connection of peripherals supported by Core i7-1255U and Xeon Silver 4509Y.

PCIe version	4.0	5
PCI Express lanes	20	80

Pros & cons summary

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Recency	23 February 2022	14 December 2023
Physical cores	10	8
Threads	12	16
Power consumption (TDP)	15 Watt	125 Watt

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Should you still have questions on choice between Core i7-1255U and Xeon Silver 4509Y, ask them in Comments section, and we shall answer.

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