Xeon E3-1276 v3 vs i9-9900K

Primary details

Comparing Core i9-9900K and Xeon E3-1276 v3 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	673	1255
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	7.73	no data
Market segment	Desktop processor	Server
Series	Core i9 (Desktop)	no data
Power efficiency	11.45	5.33
Architecture codename	Coffee Lake-R (2018−2019)	no data
Release date	8 October 2018 (6 years ago)	1 April 2014 (10 years ago)
Launch price (MSRP)	$488	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i9-9900K and Xeon E3-1276 v3 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	8 (Octa-Core)	4 (Quad-Core)
Threads	16	8
Base clock speed	3.6 GHz	3.6 GHz
Boost clock speed	5 GHz	4 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	5 GT/s
L1 cache	512 KB	no data
L2 cache	2 MB	no data
L3 cache	16 MB (shared)	8 MB Intel® Smart Cache
Chip lithography	14 nm	22 nm
Die size	178 mm2	no data
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	72 °C	no data
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	+	-

Compatibility

Information on Core i9-9900K and Xeon E3-1276 v3 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	LGA-1151	FCLGA1150
Power consumption (TDP)	95 Watt	84 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9900K and Xeon E3-1276 v3. 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)	+	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	+	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	no data	+
SIPP	+	+
FDI	no data	+
Fast Memory Access	no data	+

Security technologies

Core i9-9900K and Xeon E3-1276 v3 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	+
MPX	+	-
Identity Protection	+	+
SGX	Yes with Intel® ME	no data
OS Guard	+	+
Anti-Theft	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9900K and Xeon E3-1276 v3 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-9900K and Xeon E3-1276 v3. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4	DDR3L-1333, DDR3L-1600
Maximum memory size	128 GB	32 GB
Max memory channels	2	2
Maximum memory bandwidth	44.668 GB/s	25.6 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel UHD Graphics 630	no data
Max video memory	64 GB	1.7 GB
Quick Sync Video	+	+
Clear Video	+	no data
Clear Video HD	+	+
Graphics max frequency	1.2 GHz	1.25 GHz
Execution Units	no data	20
InTru 3D	+	+

Graphics interfaces

Available interfaces and connections of Core i9-9900K and Xeon E3-1276 v3 integrated GPUs.

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

Graphics image quality

Maximum display resolutions supported by Core i9-9900K and Xeon E3-1276 v3 integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096 x 2304@24Hz	3840x2160@60Hz
Max resolution over eDP	4096 x 2304@60Hz	no data
Max resolution over DisplayPort	4096 x 2304@60Hz	3840x2160@60Hz
Max resolution over VGA	no data	2880x1800@60Hz

Graphics API support

APIs supported by Core i9-9900K and Xeon E3-1276 v3 integrated GPUs, sometimes API versions are included.

DirectX	12	11.2
OpenGL	4.5	4.3

Peripherals

Specifications and connection of peripherals supported by Core i9-9900K and Xeon E3-1276 v3.

PCIe version	3.0	3.0
PCI Express lanes	16	16

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	11.93	4.91
Recency	8 October 2018	1 April 2014
Physical cores	8	4
Threads	16	8
Chip lithography	14 nm	22 nm
Power consumption (TDP)	95 Watt	84 Watt

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Should you still have questions on choice between Core i9-9900K and Xeon E3-1276 v3, ask them in Comments section, and we shall answer.

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