Xeon D-1521 vs i7-3840QM

Primary details

Comparing Core i7-3840QM and Xeon D-1521 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1477	1506
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	2.41
Market segment	Laptop	Server
Series	Intel Core i7	Intel Xeon D
Power efficiency	7.81	7.54
Architecture codename	Ivy Bridge (2012−2013)	Broadwell (2015−2019)
Release date	3 September 2012 (12 years ago)	1 November 2015 (9 years ago)
Launch price (MSRP)	$568	$199

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-3840QM and Xeon D-1521 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)	4 (Quad-Core)
Threads	8	8
Base clock speed	2.8 GHz	2.4 GHz
Boost clock speed	3.8 GHz	2.7 GHz
Bus type	no data	DMI 2.0
Bus rate	5 GT/s	no data
Multiplier	no data	24
L1 cache	64K (per core)	256 KB
L2 cache	256K (per core)	1 MB
L3 cache	8 MB (shared)	6 MB
Chip lithography	22 nm	14 nm
Die size	160 mm2	246.24 mm2
Maximum core temperature	105 °C	no data
Maximum case temperature (TCase)	no data	80 °C
Number of transistors	1,400 million	3200 Million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Core i7-3840QM and Xeon D-1521 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	FCBGA1224,FCPGA988	FCBGA1667
Power consumption (TDP)	45 Watt	45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3840QM and Xeon D-1521. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX	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
Demand Based Switching	-	no data
GPIO	no data	+
FDI	+	no data
Fast Memory Access	+	no data

Security technologies

Core i7-3840QM and Xeon D-1521 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-3840QM and Xeon D-1521 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-3840QM and Xeon D-1521. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	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.

Integrated graphics card	Intel HD Graphics 4000	no data
Quick Sync Video	+	-
Clear Video HD	+	no data
Graphics max frequency	1.3 GHz	no data
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Core i7-3840QM and Xeon D-1521 integrated GPUs.

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

Peripherals

Specifications and connection of peripherals supported by Core i7-3840QM and Xeon D-1521.

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.

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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	3.73	3.60
Recency	3 September 2012	1 November 2015
Chip lithography	22 nm	14 nm

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Should you still have questions on choice between Core i7-3840QM and Xeon D-1521, ask them in Comments section, and we shall answer.

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