i9-11900K vs Xeon E3-1245

Primary details

Comparing Xeon E3-1245 and Core i9-11900K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1558	415
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.22	19.17
Market segment	Server	Desktop processor
Power efficiency	3.35	12.02
Architecture codename	Sandy Bridge (2011−2013)	Rocket Lake (2021)
Release date	3 April 2011 (13 years ago)	16 March 2021 (3 years ago)
Launch price (MSRP)	$350	$539

Cost-effectiveness evaluation

Performance per price, higher is better.

i9-11900K has 1471% better value for money than Xeon E3-1245.

Detailed specifications

Xeon E3-1245 and Core i9-11900K 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	3.3 GHz	3.5 GHz
Boost clock speed	3.7 GHz	5.2 GHz
Bus rate	no data	8 GT/s
L1 cache	64 KB (per core)	80 KB (per core)
L2 cache	256 KB (per core)	512 KB (per core)
L3 cache	8 MB (shared)	16 MB (shared)
Chip lithography	32 nm	14 nm
Die size	216 mm2	276 mm2
Maximum core temperature	73 °C	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	1,160 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+

Compatibility

Information on Xeon E3-1245 and Core i9-11900K 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	LGA1155	FCLGA1200
Power consumption (TDP)	95 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1245 and Core i9-11900K. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX	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	+	+
Flex Memory Access	+	no data
SIPP	-	+
Demand Based Switching	+	no data
Turbo Boost Max 3.0	no data	+
FDI	+	no data
Fast Memory Access	+	no data
Deep Learning Boost	-	+

Security technologies

Xeon E3-1245 and Core i9-11900K technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1245 and Core i9-11900K are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1245 and Core i9-11900K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4
Maximum memory size	32 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	21 GB/s	50 GB/s
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD P3000	Intel UHD Graphics 750
Max video memory	no data	64 GB
Quick Sync Video	+	+
Clear Video	no data	+
Clear Video HD	+	+
Graphics max frequency	1.35 GHz	1.3 GHz
Execution Units	no data	32
InTru 3D	+	+

Graphics interfaces

Available interfaces and connections of Xeon E3-1245 and Core i9-11900K integrated GPUs.

Number of displays supported

2

3

Graphics image quality

Maximum display resolutions supported by Xeon E3-1245 and Core i9-11900K integrated GPUs, including resolutions over different interfaces.

4K resolution support	no data	+
Max resolution over HDMI 1.4	no data	4096x2160@60Hz
Max resolution over eDP	no data	5120 x 3200 @60Hz
Max resolution over DisplayPort	no data	5120 x 3200 @60Hz

Graphics API support

APIs supported by Xeon E3-1245 and Core i9-11900K integrated GPUs, sometimes API versions are included.

DirectX	no data	12.1
OpenGL	no data	4.5

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1245 and Core i9-11900K.

PCIe version	2.0	4.0
PCI Express lanes	20	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	3.49	16.48
Recency	3 April 2011	16 March 2021
Physical cores	4	8
Threads	8	16
Chip lithography	32 nm	14 nm
Power consumption (TDP)	95 Watt	125 Watt

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Should you still have questions on choice between Xeon E3-1245 and Core i9-11900K, ask them in Comments section, and we shall answer.

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