661GX-M2 (V5.0)
Socket 478 for Intel Pentium 4 processor
661GX-M2 is one of the most advance and unique modules of ECS production. It can also support latest Intel Pentium 4, HT&Prescott CPUs, up to 533MHz FSB, DDR400 and 8 USB 2.0 ports. With embedded Real256E Graphic engine, 64M share memory and one AGP8X slot, all these advance supports, we believe your computer can run with best performance and bring you the great value and enjoyment.

Maximizes your system performance by selecting from these overclocking options:
(1) Flexible voltage adjustments
(2) Adjustable ratio and Freq
  FSB 533MHz
Supports 533MHz front side bus Intel Pentium 4 CPU
  DDR 400
Supports bandwidth up to 3.2GB/s to provide enhanced system performance.
  AGP 8X Technology
AGP 8X / AGP3.0 enables enhanced graphics performance with high bandwidth speeds up to 2.12GB/s, twice faster than AGP 4X.
Supports Ultra DMA 33/66/100/133 IDE devices, data transfer rate up to 133MB/s
  6-Channel Audio
Onboard 6-channel audio CODEC supports uncompromising DVD audio quality, bringing a move vivid sound experience and high-quality 6-channel audio without having to buy advanced sound cards
  10/100 LAN
Provides 10/100 Mbps solution to your network or broadhand connection without having to buy an extra LAN card.
  USB 2.0
USB2.0 is the latest connectivity standard which delivers transfer speeds up to 480Mb/s for easy connectivity and ultra-fast data transfers.
CPUº Socket 478 for Intel Pentium 4 processor
º FSB 800*/ 533/ 400MHz (* means overclocking)
º Supports Hyper-Threading Technology CPU
CHIPSETº SiS® 661GX & 964L
º North Bridge: SiS® 661GX
º South Bridge: SiS® 964L
GRAPHICSº Integrated SiS Real256E Graphics
º Share memory : 64MB
MEMORYº 2 x 184-pin DDR DIMM socket support up to 2 GB
º Support DDR400/333/266 DDR SDRAM
Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows® 32-bit OS.
For Windows® 64-bit OS with 64-bit CPU, there is no such limitation

º 2 x PCI slots
º 1 x CNR slot
STORAGEº Support by SiS® 964L
    • 4 x Ultra DMA133/100/66 devices
AUDIOº C-Media CMI9761A 6-channel audio CODEC
º Compliant with AC'97 2.3 specification
LANº Realtek RTL8201BL 10/100 Mbps Fast Ethernet PHY
REAR PANEL I/Oº 1 x PS/2 keyboard & PS/2 mouse connectors
º 4 x USB ports
º 1 x RJ45 LAN connector
º 1 x VGA port
º 1 x Parallel port (LPT1)
º 1 x Serial port (COM1)
º 1 x Audio port (Line-in, Line-out, Mic-in)
INTERNAL I/O CONNECTORS & HEADERSº 1 x 20-pin ATX Power Supply Connector
º 1 x 4-pin ATX 12V connector
º 1 x FDD connector
º 360K~2.88M Byte, 3 Mode FDDs or LS120
º 2 x IDE connectors
º 2 x USB 2.0 headers support additional 4 USB 2.0 Ports
º 1 x SPDIF out header
º 1 x Front panel switch/LED header
º 1 x Front panel audio header
º 1 x Speaker header
º 1x CD in header
º CPUFAN/CASFAN connectors
º Supports Plug and Play 1.0A, APM 1.2, Multi Boot, DMI
º Supports ACPI revision 1.0 specification
FORM FACTORº Micro-ATX Size, 244mm*200mm

 Driver Download

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Please read the notes carefully before updating BIOS.
1.Do not update the BIOS if the system is running fine. Unsuccessful BIOS flash may cause the system fails to boot up. The manufacturer is not responsible for any BIOS flash failure.
2.Make sure your M/B PCB version number first, and then read the updated description & special note carefully to check if the new BIOS version patch pertain to your current problem.
(How to recognize the M/B PCB version)
3.Please DO NOT reboot system,unplug power supply and remove battery during BIOS update process.
4.It is recommended to use the updated flash utility included in each BIOS download package.
(How to use flash utility).

* means validated by ECS at time of writing. Changes to component or CPU may produce a different outcome. The result shown is for reference only and is subject to change w/o notification.

SocketFamilyProcessorWattageFrequencyCacheSteppingSince BIOS
Socket 478Intel Pentium 4N/AN/A1.4 GHz256KN/AV5.0
Socket 478Intel Pentium 4N/AN/A1.5 GHz256KN/AV5.0
Socket 478Intel Pentium 4N/AN/A1.6 GHz256KN/AV5.0
Socket 478Intel Pentium 4N/AN/A1.6A GHz256KN/AV5.0
Socket 478Intel Pentium 4N/AN/A1.7 GHz256KN/AV5.0
Socket 478Intel Pentium 4N/AN/A1.8 GHz256KN/AV5.0
Socket 478Intel Pentium 4N/AN/A1.8A GHz512KN/AV5.0
Socket 478Intel Pentium 4N/AN/A1.9 GHz256KN/AV5.0
Socket 478Intel Pentium 4N/AN/A2.0 GHz256KN/AV5.0
Socket 478Intel Pentium 4N/AN/A2.0A GHz512KN/AV5.0
Socket 478Intel Pentium 4N/AN/A2.2 GHz512KN/AV5.0
Socket 478Intel Pentium 4N/AN/A2.26 GHz512KN/AV5.0
Socket 478Intel Pentium 4N/AN/A2.4 GHz512KN/AV5.0
Socket 478Intel Pentium 4N/AN/A2.4A GHz1MN/AV5.0
Socket 478Intel Pentium 4N/AN/A2.5 GHz512KN/AV5.0
Socket 478Intel Pentium 4N/AN/A2.53 GHz512KN/AV5.0
Socket 478Intel Pentium 4N/AN/A2.6 GHz512KN/AV5.0
Socket 478Intel Pentium 4N/AN/A2.66 GHz512KN/AV5.0
LGA775Intel Pentium 4N/AN/A2.8 GHz1MN/AV5.0
Socket 478Intel Pentium 4N/AN/A2.8 GHz512KN/AV5.0
Socket 478Intel Pentium 4N/AN/A3.06 GHz512KN/AV5.0
Socket 478Intel Celeron D320 (Prescott)N/A2.4 GHz256KBN/AV5.0
Socket 478Intel Celeron D330 (Prescott)N/A2.66 GHz256KN/AV5.0
Socket 478Intel Celeron D335 (Prescott)N/A2.8 GHz256KN/AV5.0
Socket 478Intel Celeron D340 (Prescott)N/A2.93 GHz256KBN/AV5.0
Socket 478Intel Celeron D345 (Prescott)N/A3.06 GHz256KN/AV5.0
Socket 478Intel CeleronN/AN/A1.7 GHz128KN/AV5.0
Socket 478Intel CeleronN/AN/A1.8 GHz128KN/AV5.0
Socket 478Intel CeleronN/AN/A1.9 GHz128KN/AV5.0
Socket 478Intel CeleronN/AN/A2.0 GHz128KN/AV5.0
Socket 478Intel CeleronN/AN/A2.1 GHz128KN/AV5.0
Socket 478Intel CeleronN/AN/A2.2 GHz128KN/AV5.0
Socket 478Intel CeleronN/AN/A2.3 GHz128KN/AV5.0
Socket 478Intel CeleronN/AN/A2.4 GHz128KN/AV5.0
Socket 478Intel CeleronN/AN/A2.5 GHz128KN/AV5.0
Socket 478Intel CeleronN/AN/A2.6 GHz128KN/AV5.0
Socket 478Intel CeleronN/AN/A2.7 GHz128KN/AV5.0
Socket 478Intel CeleronN/AN/A2.8 GHz128KN/AV5.0