Xeon quad core w3520: Intel Xeon W3520 Processor 2.66 GHz 8 MB Cache Socket LGA1366 : Electronics

Xeon W3520 [in 3 benchmarks]


Intel started Xeon W3520 sales on March 2009 at a recommended price of $404. This is a Bloomfield architecture desktop processor primarily aimed at office systems. It has 4 cores and 8 threads, and is based on 45 nm manufacturing technology, with a maximum frequency of 2930 MHz and a locked multiplier.

Compatibility-wise, this is FCLGA1366 processor with a TDP of 130 Watt. It supports DDR3 memory.

It provides poor benchmark performance at


of a leader’s which is AMD EPYC 9654.



General info

Xeon W3520 processor market type (desktop or notebook), architecture, sales start time and pricing.

Place in performance ranking 1704
Value for money 3.11
Market segment Server
Architecture codename Bloomfield (2008−2010)
Release date March 2009 (14 years old)
Launch price (MSRP) $404 of 305 (Core i7-870)
Current price $111 (0. 3x MSRP) of 14999 (Xeon Platinum 9282)

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 cores 4 (Quad-Core)
Threads 8
Base clock speed 2.66 GHz of 4.7 (FX-9590)
Boost clock speed 2.93 GHz of 6 (Core i9-13900KS)
L1 cache 64 KB (per core) of 7475.2 (Apple M2 Pro 10-Core)
L2 cache 256 KB (per core) of 36864 (Apple M2 Max)
L3 cache 8 MB (shared) of 768 (EPYC 7373X)
Chip lithography 45 nm of 4 (Ryzen 9 7940HS)
Die size 263 mm2
Maximum core temperature 68 °C of 110 (Atom x7-E3950)
Number of transistors 731 million of 9900000 (Ryzen 5 7645HX)
64 bit support +
Windows 11 compatibility
Unlocked multiplier


Information on Xeon W3520 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 configuration 1 of 8 (Opteron 842)
Socket FCLGA1366
Power consumption (TDP) 130 Watt of 400 (Xeon Platinum 9282)

Technologies and extensions

Technological capabilities and additional instructions supported by Xeon W3520. You’ll probably need this information if you require some particular technology.

Instruction set extensions Intel® SSE4.2
Enhanced SpeedStep (EIST) +
Enhanced SpeedStep (EIST) +
Turbo Boost Technology 1. 0
Hyper-Threading Technology +
Idle States +
Thermal Monitoring
Demand Based Switching +
PAE 36 Bit

Security technologies

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


Virtualization technologies

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

VT-x +

Memory specs

Types, maximum amount and channel number of RAM supported by Xeon W3520’s memory controller. Depending on the motherboard, higher memory frequency may be supported.

Supported memory types DDR3 of 5600 (Ryzen 9 7940HS)
Maximum memory size 24 GB of 786 (Xeon E5-2670 v3)
Max memory channels 3 of 12 (Xeon Platinum 9221)
Maximum memory bandwidth 25.6 GB/s of 460.8 (EPYC 9124)
ECC memory support +

Benchmark performance

Single-core and multi-core benchmark results of Xeon W3520. 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.

Xeon W3520


    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: 68%

    Xeon W3520

    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: 37%

    Xeon W3520

    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: 37%

    Xeon W3520

    Mining hashrates

    Cryptocurrency mining performance of Xeon W3520. Usually measured in megahashes per second.

    Bitcoin / BTC (SHA256) 4.1 Mh/s  

    Relative perfomance

    Overall Xeon W3520 performance compared to nearest competitors among server CPUs.

    Intel Xeon E5-2637

    Intel Xeon X3460

    Intel Xeon X5492

    Intel Xeon W3520

    Intel Xeon E5-2403 v2

    Intel Xeon X5470
    98. 7

    Intel Xeon X3450

    Similar processors

    Here is our recommendation of several processors that are more or less close in performance to the one reviewed.










    Recommended GPUs

    People consider these graphics cards to be good for Xeon W3520, according to our PC configuration statistics.

    GeForce GTX
    1050 Ti


    GeForce GTX
    750 Ti

    4. 6%

    GeForce GTX


    GeForce GT


    Radeon RX


    Radeon RX


    Quadro FX


    Radeon RX


    GeForce GT


    GeForce GTX


    These are the fastest graphics cards for Xeon W3520 in our user configuration statistics.

    There is a total of 153 configurations based on Xeon W3520 in our database.

    GeForce RTX

    0.7% (1/153)

    GeForce RTX

    0.7% (1/153)

    Radeon RX
    5600 XT

    0.7% (1/153)

    GeForce GTX

    0.7% (1/153)

    GeForce GTX
    1660 Super

    1.3% (2/153)

    GeForce GTX
    1060 6 GB

    0.7% (1/153)

    GeForce GTX

    0.7% (1/153)

    GeForce GTX
    1060 3 GB

    0.7% (1/153)

    Radeon RX

    0. 7% (1/153)

    Radeon RX

    3.9% (6/153)

    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.

    Questions and comments

    Here you can ask a question about Xeon W3520, agree or disagree with our judgements, or report an error or mismatch.

    Please enable JavaScript to view the comments powered by Disqus.

    Intel-IMSourcing AT80601000741AB Xeon UP Quad-core W3520 2.66GHz Processor – Dihuni



    Intel-IMSourcing AT80601000741AB Xeon UP Quad-core W3520 2.66GHz Processor quantity

    SKU: AT80601000741AB

    Category: Processors

    • Overview

    • Description

    • Additional information

    • Reviews (0)

    Key Features

    • Manufacturer Part Number: AT80601000741AB
    • Processor Manufacturer: Intel
    • Processor Core: Quad-core (4 Core)
    • Clock Speed: 2. 66 GHz
    • QuickPath Interconnect: 4.80 GT/s
    • L2 Cache: 1 MB
    • L3 Cache: 8 MB
    • 64-bit Processing: Yes
    • Process Technology: 45 nm
    • Processor Socket: Socket B LGA-1366
    • Input Voltage: 1.2 V DC
    • Thermal Design Power: 130 W
    • Thermal Specification: 154.2°F (67.9°C)
    • Environmentally Friendly: Yes
    • Environmental Certification: RoHS


    Deliver top performance with the reliability your customers need for single-processor workstations. The Xeon processor 3500 series delivers intelligent performance, automated energy efficiency, and professional visualization for workstations.


    General Information
    Manufacturer: Intel-IMSourcing
    Manufacturer Part Number: AT80601000741AB
    Manufacturer Website Address: http://www.imsourcing.com
    Brand Name: Intel-IMSourcing
    Product Line: Xeon UP
    Product Model: W3520
    Product Name: Xeon UP Quad-core W3520 2. 66GHz Processor
    Product Type: Processor
    Technical Information
    Processor Manufacturer: Intel
    Processor Core: Quad-core (4 Core)
    Clock Speed: 2.66 GHz
    QuickPath Interconnect: 4.80 GT/s
    L2 Cache: 1 MB
    L3 Cache: 8 MB
    64-bit Processing: Yes
    Process Technology: 45 nm
    Processor Socket: Socket B LGA-1366
    Power Description
    Input Voltage: 1.2 V DC
    Thermal Design Power: 130 W
    Environmental Conditions
    Thermal Specification: 154.2°F (67.9°C)
    Environmentally Friendly: Yes
    Environmental Certification: RoHS

    You’re viewing: Intel-IMSourcing AT80601000741AB Xeon UP Quad-core W3520 2.66GHz Processor

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    Review of the Intel Xeon W3520 Server Processor GECID.com. Page 1

    > Intel Xeon W3520


    Page 1
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    Back in ancient times, when computers were even bigger and their processing power small, manufacturers took desperate measures to saturate the market. Perhaps we should first go back to the nineties of the last century. It was a computer Boom! It was then that demand greatly exceeded supply. Manufacturers of microprocessors could not provide not only the required number of components, but also the requested performance. Then Intel, AMD, VIA, Transmeta, WinChip, UMC and all all worked in a «common pot». Companies made each other chipsets, processors, cache memory (then it was still separate from the processor), etc. This cohesion was explained by the fact that the demand was colossal. And it wasn’t even about the money. For example, a company developed cars, before building a prototype, its behavior in operation should be calculated, in particular in normal modes (or not regular ones). For this, a mathematical model was created that described all the physical processes taking place in the car and outside it. And already by changing the perturbations (external conditions) it is possible to calculate the behavior of the car itself. But this is a huge amount of mathematical calculations. Naturally, such tasks required a super-powerful processor, and not only. No matter how much such a finished computer costs, it will still be more profitable for companies of this size to conduct virtual tests than to produce a new prototype after each failed test. It was at this time (1993), Intel introduced the revolutionary x86-compatible Pentium processors and registered them as a trademark. Apparently, even then, “smart heads” understood that it was possible to sell not only processors, but also system logic only for them, and even without fail. By itself, the Pentium had only one significant advantage, superscalar. This word meant support for computational pipelines, thanks to which the processor could execute several instructions per clock. The revolution was in the chipsets that Pentium processors worked with. It was they who gave birth to technology SM P ( Symmetric Multiprocessing Those. having a motherboard based on a chipset with support for SMP, it was quite painless to build a multiprocessor system, or a server, as it began to be called later. At that time (and even now) it was the only way to increase the computing power of a single system. However, it is worth noting that a double increase did not work, since the system bus was divided into two processors. But even that was enough at the time. At 1995 saw the light of day Pentium Pro , positioned as real «bigwigs» of information. The price for them was the highest, but the possibility of combining four processors into an SMP also promised unimaginable performance at that time. Later, in 1997, the Pentium II appeared (targeted as a more affordable replacement for the Pentium Pro) and Celeron . The latter were real «gold» and were very popular even in the server segment. To the question: “why Celeron?” the answer will be simple. K 19In 97-98, a personal computer became available not only to huge corporations, but also to small, private laboratories, educational institutions, etc. Such institutions could not afford the latest Pentium II and Pentium Pro models, and there was no talk of specialized full-fledged motherboards. Systems acting as servers were assembled from conventional components, which reduced sales of «top» processors. It was then that the Xeon trademark appeared. At the same time, the manufacturer actively began to promote propaganda to the masses that real servers are based ONLY on Xeon processors, and “handicraft” assemblies on affordable processors are nothing more than “enthusiast toys”. In support of its arguments, Intel released Pentium II Xeon . From the usual Pentium II, Pentium II Xeon differed only in twice the speed of the cache memory, which, however, was an important feature then. The newer Pentium III Xeon had not only accelerated cache memory, but also a noticeably larger amount of it — 2 MB versus 256 KB for desktop CPUs. Chipsets that support such processors have already made it possible to build servers based on four physical «cores» with virtually no loss in computing power for each. Such systems were not at all justified at that time, and the “resultant increase in computing power” was not so proportionally beneficial, but there was no other way to get a fast enough server. The next generation Pentium 4 was further divided into the server and desktop segments. The approach was radical, but far from refined. Although many Xeon and Pentium 4 processors were absolutely identical, they were packaged in different cases and had physical incompatibility: Socket 478 for the desktop segment and Socket 604 for the server segment. Moreover, the price for almost identical processors differed significantly. Despite the storm of emotions and discontent among potential buyers of «affordable» servers, the next round of connectors was also divided. LGA775 for desktop systems and LGA771 for multiprocessor. The most interesting thing was that when comparing the performance of Pentium 4 and Xeon with approximately the same characteristics, it was Xeon that came out as an outsider . With the introduction of the radically new Core architecture to the desktop market, the general notion of a powerful computer collapsed. Dual-core as an alternative to dual-processor, such an approach in the distant nineties could not even be imagined. And with the advent of the Intel Core 2 Quad Q6600 (the first quad-core desktop processor), the number of enthusiasts who want to purchase a server system has plummeted. The computing power of a desktop quad-core processor turned out to be quite enough even for the mathematical packages Matlab and Mathcad. Yes, and AMD has succeeded in the server segment. Its processors are Opteron have long used a memory controller built into the processor, which made it possible to access the memory and parallel processor bypassing the chipset. Yes, and expansion cards with PCI Express interface could easily create a powerful file storage with network access from a desktop computer.

    Let’s go back to the present, to the time of appearance of Nehalem processors from Intel. There are three things that distinguish these processors. A memory controller integrated into the processor, a new bus connecting the chipset to the processor, and a new packaging and processor socket LGA 1366 (for more details, see review Core i7-920 ) . Naturally, the first representatives of the new generation saw the light of Xeon server processors based on the Bloomfield core. As such, they were not really ready yet, adjustment was required, but they were running out of time. Having imprudence, Intel promised to present by the end of 2008 a ready desktop system on the new architecture. It was then that Intel took a not very profitable and even risky step, relabeling and partially “cutting down” generally successful processors in the server segment. The manufacturer did the same with the chipset, providing the appearance of single-processor systems based on Intel X58 Express complete with Core i7 processors. However, if you «drop deeper», then everything falls into place. First of all, those days are back when server and desktop processors have one package, for one socket. Reassuring, isn’t it? Secondly, desktop models have inherited the QPI bus, which is actually colossally fast. And why such a speed, if only the PCI-E controller «hangs» on the north bridge? Most likely, the company did not have time to develop a simpler tire. As a result, the desktop system turned out to be almost a basic server one, minus a few professional features. But, for enthusiasts, as in the «good old days», there is an opportunity to experiment, creating a kind of cocktail of components from the desktop and server segments. So today we will try to check what happens if you use the Intel Xeon W3520 server processor in a desktop system based on the GIGABYTE GA-EX58-DS4 motherboard. To begin with, let’s conduct an external inspection of the server processor.


    We haven’t seen such specimens for a long time. Marking «by hand» indicates that this is an engineering sample, and not a processor ready for retail sale. Accordingly, it came to our laboratory in such a “primordial” form: no complete cooler, no documents, no sticker. It turned out to be more than problematic to identify it by the number sSpec Q1HN , as well as by the Batch code 3842A796 . And the technical characteristics are written as AT80601000741 AB made me think hard. Handwritten data refers this instance to the Xeon family, model W3520. The clock frequency, according to the marking, is 2.66 GHz, and the thermal package does not exceed 130 watts. These data fully correspond to the official specifications declared by Intel on the official website for the Xeon W3520 model.



    Intel Xeon W3520


    SLBEW (Supposed)

    Processor socket


    Clock frequency, MHz




    Bus frequency, MHz


    L1 cache size (Data\Instructions), KB


    L2 cache size, KB


    L3 cache size, KB




    Number of cores


    Instruction support

    MMX, SSE, SSE2, SSE3, SSSE3, SSE4. 1, SSE4.2, EM64T

    Supply voltage, V

    0.800 — 1.225

    Power dissipation, W


    Critical temperature, °C


    Process technology, nm


    Technology support

    Enhanced Halt State (C1E)
    Enhanced Intel Speedstep Technology
    Hyper-Threading Technology
    Execute Disable Bit
    Intel Thermal Monitor 2
    Intel Virtualization Technology
    Intel Turbo Boost Technology

    To confirm compliance with the declared characteristics, we suggest that you familiarize yourself with the screenshot of the CPU-Z program of the latest version 1.51 at the moment.

    The revision corresponds to the “marked” one on the processor cover, the set of instructions, the QPI frequency value, the multiplier, the amount of cache memory, everything corresponds to the declared characteristics of the Intel Xeon W3520.

    The RAM, as expected, worked in three-channel mode, but at the maximum available frequency of 1066 MHz, at which it can work together with the controller integrated into the processor.

    In this review, it was decided to slightly change the sequence of actions. To begin with, we will conduct testing, and only then explanations of the results will be presented. The fact is that the use of server processors in desktop systems is new for the current generation, and many are not even aware of the results. These segments have been physically separated for far too long.

    Intel Xeon W3520-3570 and W3670, 3680, 3690: overview, specifications, prices, overclocking


    • 1 Xeon W3520 — W3565
    • 2 Xeon W3570 and W3580
    • 3 Xeon W3670, W3680 and W3690
    • 4 Gaming performance
    • 9028 7 5 Where to buy

    3000th Intel Xeon processor series for socket 1366 is presented as a quad-core line W3500 and six-core W3600. Unlike the Xeon 5600 and 5500 series, these processors cannot work in two-socket configurations, which, however, does not interfere with their operation in home systems, which are usually built on single-socket motherboards.

    Also, the W series cannot work with ECC reg memory, only ECC or regular DDR3 will do.

    Another difference is the older 45 nm manufacturing process for all 4-core models, which means, first of all, increased heating.

    Xeon W3520 — W3565


    9031 4 W3540

    9033 0 Core i7 920

    Model W3520 W3530 W3550 W3565
    Process 45 nm 45 nm 45 nm 45 nm 45 nm
    Core 4 4 4 4 4
    threads 8 8 8 8 8
    0 2. 8 GHz 2.93 GHz 3.06 GHz 3.2 GHz
    Max Turbo Bust Frequency 2.93 GHz 3.06 GHz 3 .2 GHz 3.33 GHz 3.46 GHz
    Cache 8 MB 8 MB 8 Mb 8 Mb 8 Mb 0091

    23 24 9 130 W 130 W 130 W 130 W
    Max. lid temperature 68 C 68 C 68 C 68 C 68 C
    Similar to Core i7 930 Core i7 940 Core i7 950 Core i7 960
    Estimated cost $8 — $12 $8 — $12 $10 — $15 $10 — $15 $10 — $15 90 091

    Quad-core processors similar to the Core i7 920-960 desktop line. Good budget solutions (the junior model costs about as much as a cup of coffee), in terms of performance they are close to socket 1156 quad-cores. It can be considered as an economy option.

    Xeon W3570 and W3580


    .process 45 nm 45 nm
    8 8
    Base Frequency 3.2 GHz 3.33 GHz
    Max Turbo Frequency boost 3.46 GHz 3.6 GHz
    Cache 8 MB 8 MB resident 24, unlocked 25, unlocked
    TDP 130 W 130 W
    Max. CPU cover temperature 68 C 68 C
    Approximate equivalent of Core i7 965 Extreme Edition Core i7 975 Extreme Edition
    Estimated Price $20 — $30 $35 — $50

    More powerful processors, similar in parameters to the Extreme versions of the Core i7. Thanks to the unlocked multiplier, they accelerate perfectly, leaving the previous line behind.

    Xeon W3670, W3680 and W3690


    Model W3670 W3680 W3690
    Process 32 nm 32 nm 32 nm
    Cores 6 6 6
    Threads 12 12 12
    Base frequency 3.2 GHz 3.33 GHz 3.46 GHz
    Maximum frequency in Turbo Boost 3.46 GHz 3.6 GHz 3.73 GHz
    Cache 12 MB 12 MB 900 91

    12 Mb
    Multiplier 24, locked 25, unlocked 26, unlocked
    TDP 130 W 130 W processor cover temperature 68 C 68 C 68 C
    Estimated cost $20 — $30 $25 — $35 $40 — $60

    Powerful unlocked hexa-cores (except w3670, but it has ES version) with a free multiplier) already made according to the 32 nm process technology.