i9-11900KF vs Xeon E3-1280 v5

Primary details

Comparing Xeon E3-1280 v5 and Core i9-11900KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1173	426
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.80	no data
Market segment	Server	Desktop processor
Series	Intel Xeon E3	no data
Power efficiency	6.26	11.91
Architecture codename	Skylake-S (2015)	Rocket Lake (2021)
Release date	19 October 2015 (9 years ago)	16 March 2021 (3 years ago)
Launch price (MSRP)	$612	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E3-1280 v5 and Core i9-11900KF 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)	8 (Octa-Core)
Threads	8	16
Base clock speed	3.7 GHz	3.5 GHz
Boost clock speed	4 GHz	5.2 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	8 GT/s
Multiplier	37	no data
L1 cache	256 KB	64K (per core)
L2 cache	1 MB	256K (per core)
L3 cache	8 MB (shared)	16 MB (shared)
Chip lithography	14 nm	14 nm
Die size	122 mm2	no data
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	1,400 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+

Compatibility

Information on Xeon E3-1280 v5 and Core i9-11900KF 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	FCLGA1151	FCLGA1200
Power consumption (TDP)	80 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1280 v5 and Core i9-11900KF. 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, Intel® AVX-512
AES-NI	+	+
AVX	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	+	+
Idle States	+	+
Thermal Monitoring	+	+
Turbo Boost Max 3.0	no data	+
Deep Learning Boost	-	+

Security technologies

Xeon E3-1280 v5 and Core i9-11900KF technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	+
MPX	+	-
Identity Protection	-	+
SGX	Yes with both Intel® SPS and Intel® ME	-
OS Guard	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1280 v5 and Core i9-11900KF are enumerated here.

AMD-V	+	-
VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1280 v5 and Core i9-11900KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3, DDR4	DDR4-3200
Maximum memory size	64 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	34.134 GB/s	50 GB/s
ECC memory support	+	-

Graphics image quality

Maximum display resolutions supported by Xeon E3-1280 v5 and Core i9-11900KF integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	N/A	no data
Max resolution over eDP	N/A	no data
Max resolution over DisplayPort	N/A	no data
Max resolution over VGA	N/A	no data

Graphics API support

APIs supported by Xeon E3-1280 v5 and Core i9-11900KF integrated GPUs, sometimes API versions are included.

DirectX	N/A	no data
OpenGL	N/A	no data

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1280 v5 and Core i9-11900KF.

PCIe version	3.0	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	5.31	15.80
Recency	19 October 2015	16 March 2021
Physical cores	4	8
Threads	8	16
Power consumption (TDP)	80 Watt	125 Watt

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Should you still have questions on choice between Xeon E3-1280 v5 and Core i9-11900KF, ask them in Comments section, and we shall answer.

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