K7S5A (V3.1)

CPUº Socket 462 for AMD Athlon XP/ Athlon/ Duron processor
º FSB 266/200 MHz
CHIPSETº SiS® 735 single chip
º North Bridge & South Bridge:SiS® 735
MEMORYº 2 x 184-pin DDR DIMM socket , support DDR266/200 DDR SDRAM
º 2 x 168-pin SDRAM DIMM socket support PC133/100 3.3V SDRAM
º Maximum: 1GB
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 5 x PCI slots
º 1 x AMR slot
STORAGEº Support by SiS® 735
    • 4 x Ultra DMA100/66 devices
AUDIOº C-Media CMI9738 4-channel audio CODEC
º Compliant with AC'97 2.2 specification
LANº SiS900 10/100 Mbps Fast Ethernet Controller
REAR PANEL I/Oº 1 x PS/2 keyboard & PS/2 mouse connectors
º 2 x USB 1.1 ports
º 1 x RJ45 LAN connector
º 1 x Parallel port (LPT)
º 1 x Serial port (COM1)
º 1 x Game port
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 FDD connector supports one 360K~2.88MB FDD
º 2 x IDE connectors
º 1 x IrDA for SIR header
º 1 x Speaker header
º 1 x USB 1.1 header support additional 2 USB ports
º 1 x Front panel switch/LED header
º 1 x Front panel audio header
º CD in1/CD in2 header
º CPUFAN/SYSFAN connectors
º WOL connector
º Supports Plug and Play 1.0A, APM 1.2, Multi Boot, DMI
º Supports ACPI revision 1.0 specification
FORM FACTORº ATX Size, 305mm*244mm

 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).

What is the maximum CPU and HDD capacity supported on K7S5A v3.x? 

K7S5A v3.x maximum CPU and HDD supported information as below,
CPU: AMD Duron 200Mhz FSB CPU - 950 AMD Duron 266Mhz FSB CPU - 1800
           AMD Morgan 200Mhz FSB CPU - 1.3G 
           AMD Athlon 200Mhz FSB CPU - 1.4G AMD Athlon 266Mhz FSB CPU - 1.4G
           AMD Palomino 266Mhz FSB CPU - 1.2G
           AMD Athlon XP (0.18u) 266Mhz FSB CPU - 2100+ AMD Athlon XP (0.13u) 266Mhz FSB CPU - 2600+

There is a problem with the audio driver (CD1.1s and the updated one from thewebsite) on K7S5A PCB 3.1B (CMI9738 chip) when using windows 98SE. BIOS we have tested are from 1/12/02 to the most updated from the web.System will freeze at "do you want to restart computer screen" at the end of CMedia driver installation when you do driver auto installation. At this time, mouse could still move around but could not do anything else. System will also fail to re-enter windows 98 after restart from windows 98 SE if you do a manually driver installation from device manger. The following message will appear in DOS mode. "While initializing device CONFIGMG: Windows protection error. You need to restart your computer." 

New 9738 audio driver can fix it.

No post with 133/133 setting and DDR266 on K7S5A PCB 3.X. Basically, it seems to happen on some AMD XP1800+ CPU. 

Update BIOS V02/10/01 to the latest versionfor patch on this issue .

We had problem getting the front & Back audio to work in our chassis.If we had front panel connect to the front audio connector of K7S5a, the back audio will not work.The only way to get the back audio working is to remove front audio.Please advice if there is a solution. 

Basically, the H/W design does not allow audio output to both front side and back side at the same time. If your customers still want to use the audio in both sides for special reason, they have to short both PIN 5-6 and PIN 9-10. This is only for special service and it will not be changed for mass production.

Does K7S5A support AMD Sempron CPU? 

No, the K7S5A does not support AMD Sempron CPU.

What is the qualified CPU for K7S5A V3.1? 

The following website is the CPU support table that ECS had tested and qualified for use with this motherboard.


* 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.

SocketFamilyProcessorP/N Number WattageFrequencyL2 Cache L3 Cache SteppingSince BIOS
Socket 462AMD Athlon™ XPN/AN/AN/A1500+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A1500+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A1600+ (.13u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A1600+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A1700+ (.13u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A1700+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A1800+ (.13u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A1800+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A1900+ (.13u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A1900+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A2000+ (.13u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A2000+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A2100+ (.13u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A2100+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A2200+ (.13u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A2400+ (.13u)N/A256KN/A30811
Socket 462AMD Athlon™ XPN/AN/AN/A2600+ (.13u)N/A256KN/A30811
Socket 462AMD Athlon™ MPN/AN/AN/A1500+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ MPN/AN/AN/A1600+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ MPN/AN/AN/A1800+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ MPN/AN/AN/A1900+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™ MPN/AN/AN/A2000+ (.18u)N/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A 650N/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A 700N/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A 750N/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A 800N/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A 850N/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A 900N/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A 950N/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A1.0GN/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A1.0GN/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A1.133GN/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A1.1GN/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A1.2GN/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A1.2GN/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A1.33GN/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A1.3GN/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A1.4GN/A256KN/A30811
Socket 462AMD Athlon™N/AN/AN/A1.4GN/A256KN/A30811
Socket 462AMD DuronN/AN/AN/A 600N/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A 650N/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A 700N/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A 750N/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A 800N/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A 850N/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A 900N/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A 950N/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A1.0GN/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A1.1GN/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A1.2GN/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A1.3GN/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A1.4GN/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A1.6GN/A64KN/A30811
Socket 462AMD DuronN/AN/AN/A1.8GN/A64KN/A30811
Model: K7S5A
PCB Version: V3.1
Expansion_Slot: AGP4X
USB: 1.1
Audio Pin: Front Panel MIC/Speaker Out Header
USB Pin: Front Panel USB Connector
IR Pin: Infrared Port