EPYC 9455 vs Celeron B840

Primary details

Comparing Celeron B840 and EPYC 9455 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2797	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Server
Series	Intel Celeron	no data
Power efficiency	1.64	no data
Architecture codename	Sandy Bridge (2011−2013)	Turin (2024)
Release date	1 July 2011 (13 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$86	$5,412

Detailed specifications

Celeron B840 and EPYC 9455 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	2 (Dual-core)	48 (Octatetraconta-Core)
Threads	2	96
Base clock speed	1.9 GHz	3.15 GHz
Boost clock speed	1.9 GHz	4.4 GHz
Bus type	DMI 2.0	no data
Bus rate	4 × 5 GT/s	no data
Multiplier	19	no data
L1 cache	64K (per core)	80 KB (per core)
L2 cache	256K (per core)	1 MB (per core)
L3 cache	2 MB (shared)	192 MB (shared)
Chip lithography	32 nm	4 nm
Die size	131 mm2	6x 70.6 mm2
Maximum core temperature	100 °C	no data
Number of transistors	504 million	49,890 million
64 bit support	+	+
Windows 11 compatibility	-	no data

Compatibility

Information on Celeron B840 and EPYC 9455 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)	2
Socket	FCPGA988,PGA988	SP5
Power consumption (TDP)	35 Watt	300 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron B840 and EPYC 9455. You'll probably need this information if you require some particular technology.

AES-NI	-	+
FMA	+	-
AVX	-	+
Enhanced SpeedStep (EIST)	+	no data
My WiFi	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Thermal Monitoring	+	-
Flex Memory Access	+	no data
Demand Based Switching	-	no data
FDI	+	no data
Fast Memory Access	+	no data
Precision Boost 2	no data	+

Security technologies

Celeron B840 and EPYC 9455 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data
Anti-Theft	-	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Celeron B840 and EPYC 9455 are enumerated here.

AMD-V	-	+
VT-d	-	no data
VT-x	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Celeron B840 and EPYC 9455. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR5
Maximum memory size	16 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	21.335 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics for 2nd Generation Intel Processors	N/A
Graphics max frequency	1 GHz	no data

Graphics interfaces

Available interfaces and connections of Celeron B840 and EPYC 9455 integrated GPUs.

Number of displays supported	2	no data
eDP	+	no data
DisplayPort	+	-
HDMI	+	-
SDVO	+	no data
CRT	+	no data

Peripherals

Specifications and connection of peripherals supported by Celeron B840 and EPYC 9455.

PCIe version	2.0	5.0
PCI Express lanes	16	128

Pros & cons summary

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Recency	1 July 2011	10 October 2024
Physical cores	2	48
Threads	2	96
Chip lithography	32 nm	4 nm
Power consumption (TDP)	35 Watt	300 Watt

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