Xeon E5-2603 v4 vs E5645

VS

Aggregate performance score

Xeon E5645
2010
6 cores / 12 threads, 80 Watt
3.30
+7.5%

Xeon E5645 outperforms Xeon E5-2603 v4 by a small 7% based on our aggregate benchmark results.

Primary details

Comparing Xeon E5645 and Xeon E5-2603 v4 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking15971636
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation1.281.51
Market segmentServerServer
Seriesno dataIntel Xeon E5
Power efficiency3.763.29
Architecture codenameWestmere-EP (2010−2011)Broadwell (2015−2019)
Release date16 March 2010 (14 years ago)20 June 2016 (8 years ago)
Launch price (MSRP)$294$213

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon E5-2603 v4 has 18% better value for money than Xeon E5645.

Detailed specifications

Xeon E5645 and Xeon E5-2603 v4 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)6 (Hexa-Core)
Threads126
Base clock speed2.4 GHz1.7 GHz
Boost clock speed2.67 GHz1.7 GHz
Bus typeno dataQPI
Bus rateno data2 × 6.4 GT/s
Multiplierno data17
L1 cache64 KB (per core)no data
L2 cache256 KB (per core)1.5 MB
L3 cache12 MB (shared)15 MB
Chip lithography32 nm14 nm
Die size239 mm2246.24 mm2
Maximum core temperature76 °C73 °C
Number of transistors1,170 million3200 Million
64 bit support++
Windows 11 compatibility--

Compatibility

Information on Xeon E5645 and Xeon E5-2603 v4 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 configuration22 (Multiprocessor)
SocketFCLGA1366,LGA1366FCLGA2011
Power consumption (TDP)80 Watt85 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5645 and Xeon E5-2603 v4. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.2Intel® AVX2
AES-NI++
AVX-+
vProno data+
Enhanced SpeedStep (EIST)++
Turbo Boost Technology1.0-
Hyper-Threading Technology+-
TSX-+
Idle States++
Thermal Monitoring-+
Flex Memory Accessno data-
Demand Based Switching++
PAE40 Bit46 Bit

Security technologies

Xeon E5645 and Xeon E5-2603 v4 technologies aimed at improving security, for example, by protecting against hacks.

TXT++
EDB++
Secure Keyno data+
OS Guardno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5645 and Xeon E5-2603 v4 are enumerated here.

VT-d++
VT-x++
EPT++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5645 and Xeon E5-2603 v4. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR4-1600, DDR4-1866
Maximum memory size288 GB1.5 TB
Max memory channels34
Maximum memory bandwidth32 GB/s59.7 GB/s
ECC memory support++

Peripherals

Specifications and connection of peripherals supported by Xeon E5645 and Xeon E5-2603 v4.

PCIe version2.03.0
PCI Express lanesno data40

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 3.30
+7.5%
Xeon E5-2603 v4 3.07

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
+7.5%
Xeon E5-2603 v4 4695

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 363
Xeon E5-2603 v4 582
+60.3%

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 1773
Xeon E5-2603 v4 2661
+50.1%

Gaming performance

Pros & cons summary


Performance score 3.30 3.07
Recency 16 March 2010 20 June 2016
Threads 12 6
Chip lithography 32 nm 14 nm
Power consumption (TDP) 80 Watt 85 Watt

Xeon E5645 has a 7.5% higher aggregate performance score, 100% more threads, and 6.3% lower power consumption.

Xeon E5-2603 v4, on the other hand, has an age advantage of 6 years, and a 128.6% more advanced lithography process.

Given the minimal performance differences, no clear winner can be declared between Xeon E5645 and Xeon E5-2603 v4.


Should you still have questions on choice between Xeon E5645 and Xeon E5-2603 v4, ask them in Comments section, and we shall answer.

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Intel Xeon E5645
Xeon E5645
Intel Xeon E5-2603 v4
Xeon E5-2603 v4

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Community ratings

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Questions & comments

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