Intel Xeon E5645: specs and benchmarks

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Summary

Intel started Xeon E5645 sales 16 March 2010 at a recommended price of $294. This is a Westmere-EP architecture desktop processor primarily aimed at office systems. It has 6 cores and 12 threads, and is based on 32 nm manufacturing technology, with a maximum frequency of 2670 MHz and a locked multiplier.

Compatibility-wise, this is FCLGA1366,LGA1366 processor with a TDP of 80 Watt. It supports DDR3 memory.

It provides poor benchmark performance at 3.28% of a leader's which is AMD Ryzen Threadripper PRO 7995WX.

Ryzen Threadripper PRO 7995WXRyzen ThreadripperPRO 7995WX
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General info

Xeon E5645 processor market type (desktop or notebook), architecture, sales start time and pricing.

Place in performance ranking1452
Place by popularitynot in top-100
Value for money0.96
Market segmentServer
Architecture codenameWestmere-EP (2010−2011)
Release date16 March 2010 (13 years old)
Launch price (MSRP)$294of 305 (Core i7-870)
Current price$250 (0.9x MSRP)of 17802 (Threadripper PRO 7995WX)
Value for money

Performance per price, higher is better.

Technical specs

Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.

Physical cores6 (Hexa-Core)
Threads12
Base clock speed2.4 GHzof 4.7 (FX-9590)
Boost clock speed2.67 GHzof 6 (Core i9-13900KS)
L1 cache64 KB (per core)of 7475.2 (Apple M2 Pro 10-Core)
L2 cache256 KB (per core)of 36864 (Apple M2 Max)
L3 cache12 MB (shared)of 768 (EPYC 7373X)
Chip lithography32 nmof 3 (Apple M3 Max 16-Core)
Die size239 mm2
Maximum core temperature76 °Cof 110 (Atom x7-E3950)
Number of transistors1,170 millionof 9900000 (Ryzen 5 7645HX)
64 bit support+
Windows 11 compatibility-
Unlocked multiplier-

Compatibility

Information on Xeon E5645 compatibility with other computer components and devices: 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 configuration2of 8 (Opteron 842)
SocketFCLGA1366,LGA1366
Power consumption (TDP)80 Wattof 400 (Xeon Platinum 9282)

Technologies and extensions

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

Instruction set extensionsIntel® SSE4.2
AES-NI+
Enhanced SpeedStep (EIST)+
Turbo Boost Technology1.0
Hyper-Threading Technology+
Idle States+
Thermal Monitoring-
Demand Based Switching+
PAE40 Bit
StatusDiscontinued

Security technologies

Processor technologies aimed at improving security, for example, by protecting against hacks.

TXT+
EDB+

Virtualization technologies

Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.

VT-d+
VT-x+
EPT+

Memory specs

Types, maximum amount and channel number of RAM supported by Xeon E5645's memory controller. Depending on the motherboard, higher memory frequency may be supported.

Supported memory typesDDR3of 5600 (Ryzen 9 7940HS)
Maximum memory size288 GBof 786 (Xeon E5-2670 v3)
Max memory channels3of 12 (Xeon Platinum 9221)
Maximum memory bandwidth32 GB/sof 460.8 (EPYC 9124)
ECC memory support+

Peripherals

Specifications and connection types of supported peripherals.

PCIe version2.0of 5 (Core i9-12900K)

Benchmark performance

Single-core and multi-core benchmark results of Xeon E5645. Overall benchmark performance 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.

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.

Benchmark coverage: 67%

Xeon E5645 5046

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.

Benchmark coverage: 40%

Xeon E5645 359

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.

Benchmark coverage: 40%

Xeon E5645 1681

Mining hashrates

Cryptocurrency mining performance of Xeon E5645. Usually measured in megahashes per second.

Bitcoin / BTC (SHA256) 28 Mh/s  

Gaming performance

Relative perfomance

Overall Xeon E5645 performance compared to nearest competitors among server CPUs.


Similar processors

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Recommended GPUs

People consider these graphics cards to be good for Xeon E5645, according to our PC configuration statistics.

These are the fastest graphics cards for Xeon E5645 in our user configuration statistics. There is a total of 224 configurations based on Xeon E5645 in our database.

User ratings: view and submit

Here is the rating given to the reviewed processor by our users. Let others know your opinion by rating it yourself.


4.1 53 votes

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Questions and comments

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