Xeon E3-1275 v5 vs i9-9900KF

Primary details

Comparing Core i9-9900KF and Xeon E3-1275 v5 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	657	1142
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	8.96	3.92
Market segment	Desktop processor	Server
Series	Intel Core i9	Intel Xeon E3
Architecture codename	Coffee Lake-R (2018−2019)	Skylake-DT (2015)
Release date	7 January 2019 (5 years ago)	19 October 2015 (8 years ago)
Launch price (MSRP)	$488	$350

Cost-effectiveness evaluation

Performance per price, higher is better.

i9-9900KF has 129% better value for money than Xeon E3-1275 v5.

Detailed specifications

Core i9-9900KF and Xeon E3-1275 v5 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	DMI 3.0
Bus rate	4 × 8 GT/s	4 × 8 GT/s
Multiplier	no data	36
L1 cache	512 KB	256 KB
L2 cache	2 MB	1 MB
L3 cache	16 MB (shared)	8 MB (shared)
Chip lithography	14 nm	14 nm
Die size	no data	122 mm2
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	72 °C	no data
Number of transistors	no data	1,750 million
64 bit support	+	+
Windows 11 compatibility	+	-
Unlocked multiplier	+	-

Compatibility

Information on Core i9-9900KF and Xeon E3-1275 v5 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 (Uniprocessor)
Socket	FCLGA1151	FCLGA1151
Power consumption (TDP)	95 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9900KF and Xeon E3-1275 v5. 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	+	+
Status	Discontinued	Launched

Security technologies

Core i9-9900KF and Xeon E3-1275 v5 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9900KF and Xeon E3-1275 v5 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-9900KF and Xeon E3-1275 v5. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR4-1866/2133, DDR3L-1333/1600
Maximum memory size	128 GB	64 GB
Max memory channels	2	2
Maximum memory bandwidth	42.671 GB/s	34.134 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel HD Graphics P530
Max video memory	no data	64 GB
Quick Sync Video	-	+
Clear Video	no data	+
Clear Video HD	no data	+
Graphics max frequency	no data	1.15 GHz
InTru 3D	no data	+

Graphics interfaces

Available interfaces and connections of Core i9-9900KF and Xeon E3-1275 v5 integrated GPUs.

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

Graphics image quality

Maximum display resolutions supported by Core i9-9900KF and Xeon E3-1275 v5 integrated GPUs, including resolutions over different interfaces.

4K resolution support	no data	+
Max resolution over HDMI 1.4	no data	4096x2304@24Hz
Max resolution over eDP	no data	4096x2304@60Hz
Max resolution over DisplayPort	no data	4096x2304@60Hz
Max resolution over VGA	no data	N/A

Graphics API support

APIs supported by Core i9-9900KF and Xeon E3-1275 v5 integrated GPUs, sometimes API versions are included.

DirectX	no data	12
OpenGL	no data	4.4

Peripherals

Specifications and connection of peripherals supported by Core i9-9900KF and Xeon E3-1275 v5.

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.

Pros & cons summary

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Performance score	11.84	5.51
Recency	7 January 2019	19 October 2015
Physical cores	8	4
Threads	16	8
Power consumption (TDP)	95 Watt	80 Watt

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Should you still have questions on choice between Core i9-9900KF and Xeon E3-1275 v5, ask them in Comments section, and we shall answer.

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