i9-12900KF vs Xeon E5-2643 v3

Primary details

Comparing Xeon E5-2643 v3 and Core i9-12900KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1039	188
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	36.86
Market segment	Server	Desktop processor
Series	no data	Intel Core i9
Power efficiency	4.61	19.59
Architecture codename	Haswell-EP (2014−2015)	Alder Lake, Golden Cove, Gracemont (2021)
Release date	8 September 2014 (10 years ago)	4 November 2021 (3 years ago)
Launch price (MSRP)	no data	$564

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5-2643 v3 and Core i9-12900KF 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	6 (Hexa-Core)	16 (Hexadeca-Core)
Threads	12	24
Base clock speed	3.4 GHz	3.2 GHz
Boost clock speed	3.7 GHz	5.2 GHz
Bus type	no data	DMI 4.0
Bus rate	9.6 GT/s	8 × 16 GT/s
Multiplier	no data	32
L1 cache	64K (per core)	80K (per core)
L2 cache	256K (per core)	1.25 MB (per core)
L3 cache	20 MB (shared)	30 MB (shared)
Chip lithography	22 nm	Intel 7 nm
Die size	356 mm2	215.25 mm2
Maximum core temperature	77 °C	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	2,600 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+

Compatibility

Information on Xeon E5-2643 v3 and Core i9-12900KF 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	2	1
Socket	FCLGA2011	FCLGA1700
Power consumption (TDP)	135 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2643 v3 and Core i9-12900KF. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
vPro	+	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	-	no data
Demand Based Switching	+	no data
PAE	46 Bit	no data
Turbo Boost Max 3.0	no data	+
Deep Learning Boost	-	+

Security technologies

Xeon E5-2643 v3 and Core i9-12900KF technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2643 v3 and Core i9-12900KF are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2643 v3 and Core i9-12900KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-1600, DDR4-1866, DDR4-2133	DDR5-4800, DDR4-3200
Maximum memory size	768 GB	128 GB
Max memory channels	4	2
Maximum memory bandwidth	68 GB/s	76.805 GB/s
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2643 v3 and Core i9-12900KF.

PCIe version	3.0	5.0 and 4.0
PCI Express lanes	40	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	6.58	25.88
Recency	8 September 2014	4 November 2021
Physical cores	6	16
Threads	12	24
Power consumption (TDP)	135 Watt	125 Watt

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Should you still have questions on choice between Xeon E5-2643 v3 and Core i9-12900KF, ask them in Comments section, and we shall answer.

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