EPYC 9255 vs Xeon E5345

Primary details

Comparing Xeon E5345 and EPYC 9255 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2355	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.04	no data
Market segment	Server	Server
Power efficiency	1.40	no data
Architecture codename	Clovertown (2006−2007)	Turin (2024)
Release date	14 November 2006 (18 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$851	$2,495

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon E5345 and EPYC 9255 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)	24 (Tetracosa-Core)
Threads	4	48
Base clock speed	2.33 GHz	3.25 GHz
Boost clock speed	0.33 GHz	4.8 GHz
L1 cache	64 KB (per core)	80 KB (per core)
L2 cache	4 MB (per die)	1 MB (per core)
L3 cache	8 MB L2 Cache	128 MB (shared)
Chip lithography	65 nm	4 nm
Die size	2x 143 mm2	4x 70.6 mm2
Maximum case temperature (TCase)	66 °C	no data
Number of transistors	582 million	33,260 million
64 bit support	+	+
VID voltage range	1V-1.5V	no data

Compatibility

Information on Xeon E5345 and EPYC 9255 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	2	2
Socket	LGA771,PLGA771	SP5
Power consumption (TDP)	80 Watt	200 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5345 and EPYC 9255. You'll probably need this information if you require some particular technology.

AES-NI	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	+	no data
PAE	32 Bit	no data
FSB parity	+	no data
Precision Boost 2	no data	+

Security technologies

Xeon E5345 and EPYC 9255 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5345 and EPYC 9255 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5345 and EPYC 9255. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR2, DDR3 Depends on motherboard

DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

N/A

Peripherals

Specifications and connection of peripherals supported by Xeon E5345 and EPYC 9255.

PCIe version	no data	5.0
PCI Express lanes	no data	128

Pros & cons summary

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Recency	14 November 2006	10 October 2024
Physical cores	4	24
Threads	4	48
Chip lithography	65 nm	4 nm
Power consumption (TDP)	80 Watt	200 Watt

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