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Information Technology

Fujitsu Siemens ESPRIMO E7935 Desktop Computer Motherboard Teardown

13 February 2009
The following is an overview of a teardown analysis conducted by IHS Technology Teardown Services.

Overview / Main Features

Form: Proprietary

ODM/OEM: Unknown/Fujitsu-Siemens

ODM/OEM's Mobo Name: D2828

Chipset: Intel Q45

CPU: Broad Range of Intel Core Duo, Pentium and Celerons (LGA 775 socket)

This motherboard-only analysis here is of a motherboard taken from a Fujitsu-Siemens desktop system, the Fujitsu/Siemens Esprimo E7935 E80+.

Fujitsu Siemens ESPRIMO E7935 Desktop Computer Motherboard Main ImageFujitsu Siemens ESPRIMO E7935 Desktop Computer Motherboard Main Image

Target Market

Internal use - captive Fujitsu-Siemens small form factor desktop production.


Per product literature, appears to have been release January, 2009.

Fujitsu Siemens ESPRIMO E7935 Desktop Computer Motherboard - Motherboard TopFujitsu Siemens ESPRIMO E7935 Desktop Computer Motherboard - Motherboard Top

Pricing and Availability

Pricing - Not found, as it appears the motherboard is not for sale as a stand-alone item, and is only for internal integration use into Fujitsu-Siemens Esprimo desktop systems.

Availability - N/A.

Volume Estimations

For the purposes of this teardown analysis, we have assumed a lifetime production volume of 1M units.

As a reminder, teardown volume production assumptions are primarily used for our cost analysis in terms of amortized NRE and tooling costs, especially for custom components specific to the model being analyzed (mechanical components especially). Unless assumed volumes are different by an order of magnitude, minor changes in volume (say 1 million vs. 2) rarely have a large net effect on our final analysis because of this.

Fujitsu Siemens ESPRIMO E7935 Desktop Computer Motherboard Cost AnalysisFujitsu Siemens ESPRIMO E7935 Desktop Computer Motherboard Cost Analysis

Cost Notes

Main Cost Drivers Representing 78% of Direct Materials Costs

AC82Q45SLB8A - Intel - Northbridge - Graphics and Memory Controller Hub

AF82801JDOSLG8U - Intel - Southbridge - I/O Controller Hub (ICH10)

21510121050 - EKL AG - CPU Heatsink / Cooler Assembly - Stamped Aluminum Plate, Aluminum Fins, w/ Copper Heat Pipes & 4 Spring-Loaded Metal Captive Mounting Screws

HannStar - 4-Layer - FR4

Ceramic Multilayer - X5R/X7R (Qty:398)

1746664-1 - Tyco - CPU Socket - LGA775, w/ Shepherd Hook Lever

AFB0712HHB - Delta Electronics - DC Brushless - 12VDC, 0.45A, 4-Wire, w/ 4-Pin

ISL6334BCRZ - Intersil - Regulator - PWM Controller, 4-Phase, Synchronous Rectified Buck

ISL6613CRZ - Intersil - MOSFET Driver - Dual, for Synchronous Rectified Bridge (Qty:2)

ISL6622CRZ - Intersil -

SCH5027E-NW - SMSC - I/O Controller - Super I/O Device, LPC Interface

Materials and Manufacturing $80.91

What Is Not Included in our Cost Analysis

The total materials and manufacturing costs reported in this analysis reflect ONLY the direct materials cost (from component vendors and assorted EMS providers), AND manufacturing with basic test. Not included in this analysis are costs above and beyond the material manufacture of the core device itself - cost of intellectual property, royalties and licensing fees (those not already included into the per component price), software, software loading and test, shipping, logistics marketing and other channel costs including not only EMS provider and the OEM's margin, but that of other resellers. Our cost analysis is meant to focus on those costs incurred in the manufacture of the core device and exceptionally in some circumstances the packaging and literature as well.

Manufacturing Notes

OEM/ODM/EMS Relationships / Manufacturing

Per iSuppli's "Global OEM Manufacturing and Design Analysis (GOMDA), we know that Fujitsu-Siemens work with the following design and manufacturing partners: Quanta, Wistron, ECS, and FIC. Fujitsu-Siemens also have their own internal design centers in Kawasaki, Japan and Paderborn, Germany (with manufacturing in Augsburg, and Smmerda, Germany).

Country of Origin / Volume Assumptions

This particular motherboard has printed on it: ""Designed and Assembled in Europe" - therefore we are assuming this motherboard is Made In Germany. This puts Fujitsu-Siemens at a distinct cost disadvantage when compared with so many other Chinese and Taiwanese-based motherboard manufacturers. However, it could be argued that by producing domestically in Germany for devices that will be consumer, ultimately, in Europe, that from a total cost perspective there is some offset in reduced logistics and other costs. But furthermore, Fujitsu-Siemens may be somewhat removed from the extremely efficient component market that exists in China specifically to support so many motherboard manufacturers, making their primary marterials costs higher.

Country of origin assumptions relate directly to the associated cost of manufacturing, where calculated by iSuppli. In the cases of 'finished' sub-assemblies, we do not calculate internal manufacturing costs, but rather assess the market price of the finished product in which case country of origin assumptions may or may not have a direct effect on pricing.

Remember also that labor rates are applied directly only to hand inserted components and systems in our bill of materials, and although regional assumptions do, these new rates do not have a direct effect on our modeled calculations of placement costs for automated SMD assembly lines. ""Auto" inserted components (such as SMT components) placement costs are calculated by an iSuppli algorithm which allocates a cost per component based on the size and pincount of the device. This calculation is affected by country or region of origin as well.

Design for Manufacturing / Device Complexity

The component count of this Gigabyte motherboard is 1008 vs. an overall average component count we see historically in desktop motherboards of about 1190 total components, making this device below average in component count.

Component counts have a direct bearing on the overall manufacturing cycle times and costs, and also can increase or decrease overall yields and re-work. Our calculations of manufacturing costs factor counts and more qualitative complexities in the design.

Note that manual labor has a much smaller effect on auto-insertion assembly lines (for the Main PCB, for example), where manufacturing costs are much more capital equipment intensive and driven by these investment costs.

Design Notes

The Fujitsu/Siemens Esprimo E7935 E80+ Motherboard is based on an Intel Q45 chipset composed of discrete North and Southbridge ICs. The I/O section features an SMSC Super I/O device (SCH5027), an Intel Gigabit Ethernet Transceiver (WG82567LM), and an HD audio codec from Realtek (ALC663). Also featured are a Microchip microcontroller, a TPM module from Infineon, and a TI RS-232 driver/receiver.

Here is a summary of the major components used in the Fujitsu/Siemens Esprimo E7935 E80+ D2828 Motherboard



  • Intel - AC82Q45SLB8A - Northbridge - Graphics and Memory Controller Hub


  • Intel - AF82801JDOSLG8U - Southbridge - I/O Controller Hub (ICH10)

I/O & Interface

  • I/O Controller - SMSC - SCH5027E-NW - Super I/O Device, LPC Interface
  • Ethernet Transceiver - Intel - WG82567LM - Gigabit LAN Connect
  • Codec - Realtek - ALC663-GR - Audio, HD, 5.1 Channel
  • Microcontroller - Microchip - PIC18F25J10-1/SS16Kb, CMOS Flash, RISC CPU
  • Trusted Platform Module (TPM) - Infineon - SLB9635TT1.2 - Microcontroller for Computing Security
  • RS-232 Driver/Receiver - Texas Instruments - GD75232PWG4 - 3 Drivers, 5 Receivers

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