EPYC 7643 vs Xeon W3503

Primary details

Comparing Xeon W3503 and EPYC 7643 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2716	38
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	4.15	6.71
Market segment	Server	Server
Series	no data	AMD EPYC
Power efficiency	0.51	20.14
Architecture codename	Bloomfield (2008−2010)	Milan (2021−2023)
Release date	30 March 2009 (15 years ago)	12 January 2021 (3 years ago)
Launch price (MSRP)	$65	$4,995

Cost-effectiveness evaluation

Performance per price, higher is better.

EPYC 7643 has 62% better value for money than Xeon W3503.

Detailed specifications

Xeon W3503 and EPYC 7643 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	2.4 GHz	2.3 GHz
Boost clock speed	2.4 GHz	3.6 GHz
Multiplier	no data	23
L1 cache	64 KB (per core)	3 MB
L2 cache	256 KB (per core)	24 MB
L3 cache	4 MB (shared)	256 MB (shared)
Chip lithography	45 nm	7 nm+
Die size	263 mm2	8x 81 mm2
Number of transistors	731 million	33,200 million
64 bit support	+	+
Windows 11 compatibility	-	+
VID voltage range	0.8V-1.225V	no data

Compatibility

Information on Xeon W3503 and EPYC 7643 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	2
Socket	1366	SP3
Power consumption (TDP)	130 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon W3503 and EPYC 7643. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	no data
AES-NI	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Demand Based Switching	+	no data
PAE	36 Bit	no data

Security technologies

Xeon W3503 and EPYC 7643 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 W3503 and EPYC 7643 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 W3503 and EPYC 7643. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4-3200
Maximum memory size	24 GB	4 TiB
Max memory channels	3	no data
Maximum memory bandwidth	25.6 GB/s	204.795 GB/s
ECC memory support	+	-

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 W3503 and EPYC 7643.

PCIe version	2.0	4.0
PCI Express lanes	no data	128

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	0.70	47.88
Recency	30 March 2009	12 January 2021
Physical cores	2	48
Threads	2	96
Chip lithography	45 nm	7 nm
Power consumption (TDP)	130 Watt	225 Watt

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Should you still have questions on choice between Xeon W3503 and EPYC 7643, ask them in Comments section, and we shall answer.

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