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EliteGroup C51GM-M (V1.0) GeForce 6100 with AM2 Socket Motherboard Teardown

30 April 2007
The following is an overview of a teardown analysis conducted by IHS Technology Teardown Services.

Main Features / Overview

The EliteGroup Comupter Systems (ECS) C51GM-M (V1.0) is a Micro-ATX form factor motherboard from EliteGroup Comupter Systems (ECS), Taiwan. This motherboard is based on an NVIDIA GeForce 6100 & nForce (Northbridge/Southbridge) chipset, and features a 940-pin "AM2 socket that supports AMD Athlon 64 CPUs (not included in this analysis). See feature list for feature details.

EliteGroup C51GM-M (V1.0) GeForce 6100 with AM2 Socket Motherboard Main ImageEliteGroup C51GM-M (V1.0) GeForce 6100 with AM2 Socket Motherboard Main Image

Pricing and Availability

Found for as low as ~$75 USD online at the time of writing (4/26/07).

Volume Estimations / Sector Performance

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

EliteGroup C51GM-M (V1.0) GeForce 6100 with AM2 Socket Motherboard Cost AnalysisEliteGroup C51GM-M (V1.0) GeForce 6100 with AM2 Socket Motherboard Cost Analysis

Cost Notes

Main Cost Drivers Representing ~66% of total materials cost as follows :

Nvidia - NF-6100-N-A2 - Northbridge - Memory Controller and Graphics Hub - GeForce 6100

Nvidia - NF-410-N-A3 - Southbridge - I/O Controller Hub - nForce 410

Jiangmen Benlida - - 4-Layer - FR4

Tyco - - Socket - PGA w/ Lock

iTE - IT8716F-S - I/O Controller - Super I/O Device, Low Pin Count

Anpec - APM2506NU - MOSFET - N-Channel Enhancement Mode, 25V, 60A

Broadcom - AC131 - Ethernet Controller

Realtek - ALC655 - Codec - Audio, AC97 2.3, 6-Channel, 16-Bit, Full Duplex

Total BOM Costs (w/Manufacturing) $50.28

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 and 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

Country of Origin / Volume Assumptions

We have assumed that for this device, that not only final assembly, but also any custom mechanicals (PCBs, plastics, and metals, etc.) were all sourced or manufactured domestically in China. Most motherboard manufacturers, while based in Taiwan, are assumed to be producing the bulk of their boards in mainland China.

Country of origin assumptions relate directly to the associated cost of manufacturing, where calculated by iSuppli. In the cases of 'finished' sub-assemblies (such as chargers), 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.

The issue of labor rates was revisited in 2006 as we began to apply some research by one the major worldwide EMS suppliers and are now applying some of their research on total loaded costs by country and region to arrive at these new rates which are pronouncedly higher on the low end in China. Remember 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.

Design for Manufacturing / Device Complexity

Motherboards, even when base on identical core chipsets, tend to take varying design approaches (and implementation of various features) and therefore will vary in terms of complexity, cost and component count. Using component counts and I/O counts, relative comparisons can be made between similar motherboards and other devices. In fact - this motherboard was analyzed against 3 other (4 total) motherboards with 940-pin sockets for AMD Athlon - so these other boards make for the best comparison.

The average component count for these 4 motherboards is 978, with the (ECS) C51GM-M (V1.0) is coming in at a slightly above average component count total of 990.

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. The cost of manufacturing is also, to some extent, decreased in this case because of assumed labor rate applied for China.

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

This ECS C51GM-M motherboard is based on an NVIDIA GeForce 6100 & nForce (Northbridge/Southbridge) chipset, and features a 940-pin ""AM2" socket that supports AMD Athlon 64 CPUs (not included in this analysis). We have not seen this particular chipset in previous teardowns.

Here is a summary of the major components used in the ECS C51GM-M (V1.0) design:



  • Northbridge - Nvidia - GeForce 6100 - Memory Controller and Graphics Hub


  • Southbridge - Nvidia - nForce 410 - I/O Controller Hub

I/O Interface

  • I/O Controller - ITE - IT8716F-S - Super I/O Device, Low Pin Count
  • Ethernet Controller - Broadcom - AC131
  • Audio Codec - Realtek - ALC655 - AC97 2.3, 6-Channel, 16-Bit, Full Duplex

Memory (On Mobo)

  • NOR Flash - pFLASH - Pm49FL004T-33JCE - 4Mb (512Kx8), Firmware Hub, Low Pin Count, 33MHz, 3.3V


EliteGroup C51GM-M (V1.0) GeForce 6100 with AM2 Socket Motherboard - Box ContentsEliteGroup C51GM-M (V1.0) GeForce 6100 with AM2 Socket Motherboard - Box Contents

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