🧠 Motherboard Overview:

• Brand / Model: ECS EliteGroup K7SEM

• Socket Type: Socket 462 / Socket A

• Form Factor: Micro ATX

• Chipset: SiS730S integrated chipset (SiS730S Northbridge + SiS962L Southbridge)

• CPU Support:

  • AMD Duron

  • AMD Athlon Thunderbird

  • AMD Athlon XP (Palomino core only, up to ~1800+ depending on BIOS)

• Included CPU:

  • AMD Duron 900 MHz (Model: D900AUT1B)

  • Core: Spitfire

  • Cache: 64KB L1 + 64KB L2

  • FSB: 100 MHz (200 MT/s)

  • TDP: ~42W

  • Die Size: 180nm

🔧 Key Specifications:FeatureDetailsRAM Support2x 168-pin SDRAM slots – Up to 1GB total (PC100/PC133)Expansion Slots1x AGP 2x (1.5V), 2x PCI, 1x AMRIntegrated GraphicsSiS 630/730 (shared memory VGA, AGP 2X performance)Integrated AudioAC'97 Codec (2/4-channel output)Integrated LANRealtek RTL8100B (10/100 Mbps Ethernet)Storage I/O2x IDE (ATA 66/100), 1x FloppyI/O Ports2x PS/2, VGA, 2x Serial, 1x Parallel, 2x USB 1.1, LAN, Audio In/Out/MicBIOSAward BIOS with user-configurable CPU, voltage, and FSB settings💾 Compatible Operating Systems:

• Windows 98 SE

• Windows ME

• Windows 2000

• Windows XP

• Some Linux distributions with older kernels (2.4.x–2.6.x)

Great for retro gaming, DOSBox frontend machines, Win98/XP-era software, legacy business or industrial systems.

📝 Included in This Listing:

• ✅ ECS K7SEM MicroATX Motherboard

• ✅ Pre-installed AMD Duron 900 MHz CPU (D900AUT1B)

• ❌ No RAM

• ❌ No drivers CD (can be downloaded from archives)

🛠️ Condition Notes:

🔹 Clean board, couple slightly bulging capacitors, but no leaking capacitors
🔹 CPU securely installed, tested to POST
🔹 Battery present CR2032 (original, might need replacement)
🔹 VGA, Ethernet, and PS/2 ports tested and functional

📏 Motherboard Layout Highlights:

• MicroATX form factor: approx. 9.6 in x 7.6 in

• Power connector: Standard 20-pin ATX

• Clear CMOS jumper and CPU FSB configuration via jumper blocks