i9-12900K vs Xeon E3-1275L v3

Primary details

Comparing Xeon E3-1275L v3 and Core i9-12900K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1423	184
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	36.08
Market segment	Server	Desktop processor
Series	no data	Intel Core i9
Power efficiency	8.33	19.77
Architecture codename	no data	Alder Lake, Golden Cove, Gracemont (2021)
Release date	1 April 2014 (10 years ago)	27 October 2021 (3 years ago)
Launch price (MSRP)	no data	$589

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E3-1275L v3 and Core i9-12900K 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)	16 (Hexadeca-Core)
Threads	8	24
Base clock speed	2.7 GHz	3.2 GHz
Boost clock speed	3.9 GHz	5.2 GHz
Bus type	no data	DMI 4.0
Bus rate	5 GT/s	8 × 16 GT/s
Multiplier	no data	32
L1 cache	no data	768 KB
L2 cache	no data	4 MB
L3 cache	8 MB Intel® Smart Cache	6 MB
Chip lithography	22 nm	10 nm
Die size	no data	215.25 mm2"
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	no data	72 °C
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+

Compatibility

Information on Xeon E3-1275L v3 and Core i9-12900K 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	FCLGA1150	FCLGA1700
Power consumption (TDP)	45 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1275L v3 and Core i9-12900K. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	-	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	+	-
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	no data
SIPP	+	+
Turbo Boost Max 3.0	no data	+
FDI	+	no data
Fast Memory Access	+	no data
Deep Learning Boost	-	+

Security technologies

Xeon E3-1275L v3 and Core i9-12900K technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	+
Identity Protection	+	-
OS Guard	+	+
Anti-Theft	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1275L v3 and Core i9-12900K are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1275L v3 and Core i9-12900K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3-1333, DDR3-1600	DDR4, DDR5
Maximum memory size	32 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	25.6 GB/s	76.805 GB/s
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® HD Graphics for 4th Generation Intel® Processors	Intel UHD Graphics 770
Max video memory	1.7 GB	no data
Quick Sync Video	+	+
Clear Video HD	+	+
Graphics max frequency	1.2 GHz	1.55 GHz
Execution Units	10	32
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Xeon E3-1275L v3 and Core i9-12900K integrated GPUs.

Number of displays supported	3	4
eDP	+	no data
DisplayPort	+	-
HDMI	+	-
VGA	+	no data

Graphics image quality

Maximum display resolutions supported by Xeon E3-1275L v3 and Core i9-12900K integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	3840x2160@60Hz	4096 x 2160 @ 60Hz
Max resolution over eDP	no data	5120 x 3200 @ 120Hz
Max resolution over DisplayPort	3840x2160@60Hz	7680 x 4320 @ 60Hz
Max resolution over VGA	2880x1800@60Hz	no data

Graphics API support

APIs supported by Xeon E3-1275L v3 and Core i9-12900K integrated GPUs, sometimes API versions are included.

DirectX	11.2	12
OpenGL	4.3	4.5

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1275L v3 and Core i9-12900K.

PCIe version	3.0	5.0 and 4.0
PCI Express lanes	16	20

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	4.11	27.10
Recency	1 April 2014	27 October 2021
Physical cores	4	16
Threads	8	24
Chip lithography	22 nm	10 nm
Power consumption (TDP)	45 Watt	125 Watt

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Should you still have questions on choice between Xeon E3-1275L v3 and Core i9-12900K, ask them in Comments section, and we shall answer.

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