EPYC 7551P vs Xeon E5645

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Aggregate performance score

Xeon E5645
2010
6 cores / 12 threads, 80 Watt
3.18
EPYC 7551P
2017
32 cores / 64 threads, 180 Watt
24.03
+656%

EPYC 7551P outperforms Xeon E5645 by a whopping 656% based on our aggregate benchmark results.

Primary details

Comparing Xeon E5645 and EPYC 7551P processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1618212
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation1.384.17
Market segmentServerServer
Seriesno dataAMD EPYC
Power efficiency3.7612.63
Architecture codenameWestmere-EP (2010−2011)Naples (2017−2018)
Release date16 March 2010 (14 years ago)20 June 2017 (7 years ago)
Launch price (MSRP)$294$2,100

Cost-effectiveness evaluation

Performance per price, higher is better.

EPYC 7551P has 202% better value for money than Xeon E5645.

Detailed specifications

Xeon E5645 and EPYC 7551P 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 cores6 (Hexa-Core)32 (Dotriaconta-Core)
Threads1264
Base clock speed2.4 GHz2 GHz
Boost clock speed2.67 GHz2 GHz
Multiplierno data20
L1 cache64 KB (per core)3 MB
L2 cache256 KB (per core)16 MB
L3 cache12 MB (shared)64 MB (shared)
Chip lithography32 nm14 nm
Die size239 mm2213 mm2
Maximum core temperature76 °Cno data
Number of transistors1,170 million19200 Million
64 bit support++
Windows 11 compatibility--
Unlocked multiplier-+

Compatibility

Information on Xeon E5645 and EPYC 7551P 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 (Uniprocessor)
SocketFCLGA1366,LGA1366TR4
Power consumption (TDP)80 Watt180 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5645 and EPYC 7551P. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.2no data
AES-NI++
AVX-+
Enhanced SpeedStep (EIST)+no data
Turbo Boost Technology1.0no data
Hyper-Threading Technology+no data
Idle States+no data
Demand Based Switching+no data
PAE40 Bitno data

Security technologies

Xeon E5645 and EPYC 7551P 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 E5645 and EPYC 7551P are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5645 and EPYC 7551P. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR4 Eight-channel
Maximum memory size288 GB2 TiB
Max memory channels38
Maximum memory bandwidth32 GB/s170.671 GB/s
ECC memory support++

Peripherals

Specifications and connection of peripherals supported by Xeon E5645 and EPYC 7551P.

PCIe version2.03.0
PCI Express lanesno data128

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 E5645 3.18
EPYC 7551P 24.03
+656%

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 E5645 5048
EPYC 7551P 38166
+656%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Xeon E5645 372
EPYC 7551P 924
+148%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Xeon E5645 1842
EPYC 7551P 6238
+239%

Gaming performance

Pros & cons summary


Performance score 3.18 24.03
Recency 16 March 2010 20 June 2017
Physical cores 6 32
Threads 12 64
Chip lithography 32 nm 14 nm
Power consumption (TDP) 80 Watt 180 Watt

Xeon E5645 has 125% lower power consumption.

EPYC 7551P, on the other hand, has a 655.7% higher aggregate performance score, an age advantage of 7 years, 433.3% more physical cores and 433.3% more threads, and a 128.6% more advanced lithography process.

The EPYC 7551P is our recommended choice as it beats the Xeon E5645 in performance tests.


Should you still have questions on choice between Xeon E5645 and EPYC 7551P, ask them in Comments section, and we shall answer.

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Intel Xeon E5645
Xeon E5645
AMD EPYC 7551P
EPYC 7551P

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Community ratings

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4.1 58 votes

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4.3 80 votes

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Questions & comments

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