Celeron 6305 vs Xeon D-1521

Primary details

Comparing Xeon D-1521 and Celeron 6305 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1506	2258
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.41	no data
Market segment	Server	Laptop
Series	Intel Xeon D	Intel Tiger Lake
Power efficiency	7.54	8.23
Architecture codename	Broadwell (2015−2019)	Tiger Lake-U (2020)
Release date	1 November 2015 (9 years ago)	1 September 2020 (4 years ago)
Launch price (MSRP)	$199	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon D-1521 and Celeron 6305 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)	2 (Dual-core)
Threads	8	2
Base clock speed	2.4 GHz	no data
Boost clock speed	2.7 GHz	1.8 GHz
Bus type	DMI 2.0	no data
Bus rate	no data	4 GT/s
Multiplier	24	no data
L1 cache	256 KB	160 KB
L2 cache	1 MB	2.5 MB
L3 cache	6 MB	4 MB
Chip lithography	14 nm	10 nm SuperFin
Die size	246.24 mm2	no data
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	80 °C	no data
Number of transistors	3200 Million	no data
64 bit support	+	+
Windows 11 compatibility	-	+

Compatibility

Information on Xeon D-1521 and Celeron 6305 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	FCBGA1667	FCBGA1449
Power consumption (TDP)	45 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon D-1521 and Celeron 6305. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	no data
Speed Shift	no data	+
Turbo Boost Technology	2.0	-
Hyper-Threading Technology	+	-
TSX	+	-
Idle States	+	+
Thermal Monitoring	+	+
GPIO	+	no data
Deep Learning Boost	-	+

Security technologies

Xeon D-1521 and Celeron 6305 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon D-1521 and Celeron 6305 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon D-1521 and Celeron 6305. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4, DDR3	DDR4
Maximum memory size	128 GB	64 GB
Max memory channels	2	2
Maximum memory bandwidth	34.124 GB/s	no data
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel® UHD Graphics for 11th Gen Intel® Processors
Quick Sync Video	-	+
Clear Video HD	no data	+
Graphics max frequency	no data	1.25 GHz
Execution Units	no data	48

Graphics interfaces

Available interfaces and connections of Xeon D-1521 and Celeron 6305 integrated GPUs.

Number of displays supported

no data

4

Graphics image quality

Maximum display resolutions supported by Xeon D-1521 and Celeron 6305 integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	no data	4096x2304@60Hz
Max resolution over eDP	no data	4096x2304@60Hz
Max resolution over DisplayPort	no data	7680x4320@60Hz

Graphics API support

APIs supported by Xeon D-1521 and Celeron 6305 integrated GPUs, sometimes API versions are included.

DirectX	no data	12.1
OpenGL	no data	4.6

Peripherals

Specifications and connection of peripherals supported by Xeon D-1521 and Celeron 6305.

PCIe version	2.0/3.0	no data
PCI Express lanes	24	no data
USB revision	2.0/3.0	no data
Total number of SATA ports	6	no data
Number of USB ports	8	no data
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	3.60	1.31
Recency	1 November 2015	1 September 2020
Physical cores	4	2
Threads	8	2
Chip lithography	14 nm	10 nm
Power consumption (TDP)	45 Watt	15 Watt

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Should you still have questions on choice between Xeon D-1521 and Celeron 6305, ask them in Comments section, and we shall answer.

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