ECS RS400-A supports 800/533 MHz FSB, dual-channel DDR2-667/533/400 and DDR-400/333 memory. The graphic subsystem bases on Radeon X300 GPU with hardware DirectX 9 support and ATI AGP Express bridge.

The Southbridge offers 4 x SATA and Ultra DMA 133 (RAID0, 1, 0+1), 8 x USB 2.0, Fast Ethernet Realtek 10/100 Mbps.

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