Ryzen 9 7900X vs Xeon E5-2666 V3

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Aggregate performance score

Xeon E5-2666 V3
2014
10 cores / 20 threads, 135 Watt
8.92
Ryzen 9 7900X
2022
12 cores / 24 threads, 170 Watt
32.51
+264%

Ryzen 9 7900X outperforms Xeon E5-2666 V3 by a whopping 264% based on our aggregate benchmark results.

Primary details

Comparing Xeon E5-2666 V3 and Ryzen 9 7900X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking866124
Place by popularitynot in top-100not in top-100
Market segmentServerDesktop processor
Power efficiency6.2518.10
Architecture codenameHaswell-EP (2014−2015)Raphael (Zen4) (2022−2023)
Release date13 November 2014 (10 years ago)27 September 2022 (2 years ago)

Detailed specifications

Xeon E5-2666 V3 and Ryzen 9 7900X 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 cores10 (Deca-Core)12 (Dodeca-Core)
Threads2024
Base clock speed2.9 GHz4.7 GHz
Boost clock speed3.5 GHz5.6 GHz
L1 cache64K (per core)64K (per core)
L2 cache256K (per core)1 MB (per core)
L3 cache25 MB (shared)64 MB (shared)
Chip lithography22 nm5 nm
Die size356 mm22x 70 (CCD) mm2 + 122 (I/O) mm2
Maximum core temperatureno data95 °C
Maximum case temperature (TCase)no data47 °C
Number of transistors2,600 millionCCD: 6,5 Mrd + IOD: 3,4 Mrd Million
64 bit support++
Windows 11 compatibilityno data+
Unlocked multiplier-+

Compatibility

Information on Xeon E5-2666 V3 and Ryzen 9 7900X 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 configuration21
Socket2011-3AM5
Power consumption (TDP)135 Watt170 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2666 V3 and Ryzen 9 7900X. You'll probably need this information if you require some particular technology.

Instruction set extensionsno data5 nm (CCD), 6 nm (I/O) nm, 0.650 - 1.475V
AES-NI++
AVX++
vPro+no data
Enhanced SpeedStep (EIST)+no data
TSX+-
Precision Boost 2no data+

Security technologies

Xeon E5-2666 V3 and Ryzen 9 7900X technologies aimed at improving security, for example, by protecting against hacks.

TXT+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2666 V3 and Ryzen 9 7900X 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 Xeon E5-2666 V3 and Ryzen 9 7900X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3, DDR4 2133 MHz Quad-channelDDR5-5200

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataAMD Radeon Graphics (Ryzen 7000)

Peripherals

Specifications and connection of peripherals supported by Xeon E5-2666 V3 and Ryzen 9 7900X.

PCIe version3.05.0
PCI Express lanes4024

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


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.

Xeon E5-2666 V3 8.92
Ryzen 9 7900X 32.51
+264%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Xeon E5-2666 V3 14167
Ryzen 9 7900X 51640
+265%

Gaming performance

Pros & cons summary


Performance score 8.92 32.51
Recency 13 November 2014 27 September 2022
Physical cores 10 12
Threads 20 24
Chip lithography 22 nm 5 nm
Power consumption (TDP) 135 Watt 170 Watt

Xeon E5-2666 V3 has 25.9% lower power consumption.

Ryzen 9 7900X, on the other hand, has a 264.5% higher aggregate performance score, an age advantage of 7 years, 20% more physical cores and 20% more threads, and a 340% more advanced lithography process.

The Ryzen 9 7900X is our recommended choice as it beats the Xeon E5-2666 V3 in performance tests.

Be aware that Xeon E5-2666 V3 is a server/workstation processor while Ryzen 9 7900X is a desktop one.


Should you still have questions on choice between Xeon E5-2666 V3 and Ryzen 9 7900X, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


Intel Xeon E5-2666 V3
Xeon E5-2666 V3
AMD Ryzen 9 7900X
Ryzen 9 7900X

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Community ratings

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