Xeon D-1581 vs E3-1246 v3

Place in the ranking	1304	912
Place by popularity	not in top-100	not in top-100
Market segment	Server	Server
Series	no data	Intel Xeon D
Power efficiency	5.17	12.15
Architecture codename	no data	Broadwell (2015−2019)
Release date	1 April 2014 (10 years ago)	24 February 2016 (8 years ago)

Detailed specifications

Xeon E3-1246 v3 and Xeon D-1581 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)	16 (Hexadeca-Core)
Threads	8	32
Base clock speed	3.5 GHz	1.8 GHz
Boost clock speed	3.9 GHz	2.4 GHz
Bus type	no data	DMI 2.0
Bus rate	5 GT/s	no data
Multiplier	no data	18
L1 cache	no data	64K (per core)
L2 cache	no data	256K (per core)
L3 cache	8 MB Intel® Smart Cache	1.5 MB (per core)
Chip lithography	22 nm	14 nm
Die size	no data	306.18 mm²
Maximum case temperature (TCase)	no data	80 °C
Number of transistors	no data	3,200 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Xeon E3-1246 v3 and Xeon D-1581 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 (Uniprocessor)
Socket	FCLGA1150	FCBGA1667
Power consumption (TDP)	84 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E3-1246 v3 and Xeon D-1581. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® AVX2
AES-NI	+	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
My WiFi	-	no data
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	+	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	no data
SIPP	+	-
GPIO	no data	+
FDI	+	no data
Fast Memory Access	+	no data

Security technologies

Xeon E3-1246 v3 and Xeon D-1581 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E3-1246 v3 and Xeon D-1581 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E3-1246 v3 and Xeon D-1581. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3L-1333, DDR3L-1600	DDR4, DDR3
Maximum memory size	32 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	25.6 GB/s	34.124 GB/s
ECC memory support	+	+

Graphics specifications

General parameters of integrated GPUs, if any.

Max video memory	1.7 GB	no data
Quick Sync Video	+	-
Clear Video HD	+	no data
Graphics max frequency	1.2 GHz	no data
Execution Units	20	no data
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Xeon E3-1246 v3 and Xeon D-1581 integrated GPUs.

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

Graphics image quality

Maximum display resolutions supported by Xeon E3-1246 v3 and Xeon D-1581 integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	3840x2160@60Hz	no data
Max resolution over DisplayPort	3840x2160@60Hz	no data
Max resolution over VGA	2880x1800@60Hz	no data

Graphics API support

APIs supported by Xeon E3-1246 v3 and Xeon D-1581 integrated GPUs, sometimes API versions are included.

DirectX	11.2	no data
OpenGL	4.3	no data

Peripherals

Specifications and connection of peripherals supported by Xeon E3-1246 v3 and Xeon D-1581.

PCIe version	3.0	2.0/3.0
PCI Express lanes	16	24
USB revision	no data	2.0/3.0
Total number of SATA ports	no data	6
Number of USB ports	no data	8
Integrated LAN	no data	+
UART	no data	+

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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.

Xeon E3-1246 v3 4.59

Xeon D-1581 8.35
+81.9%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Xeon E3-1246 v3 7284

Xeon D-1581 13259
+82%

Gaming performance

Pros & cons summary

Performance score	4.59	8.35
Recency	1 April 2014	24 February 2016
Physical cores	4	16
Threads	8	32
Chip lithography	22 nm	14 nm
Power consumption (TDP)	84 Watt	65 Watt

Xeon D-1581 has a 81.9% higher aggregate performance score, an age advantage of 1 year, 300% more physical cores and 300% more threads, a 57.1% more advanced lithography process, and 29.2% lower power consumption.

The Xeon D-1581 is our recommended choice as it beats the Xeon E3-1246 v3 in performance tests.

Should you still have questions on choice between Xeon E3-1246 v3 and Xeon D-1581, ask them in Comments section, and we shall answer.