Sorry to say, but it does not look like that motherboard supports Pentium D processors.<br><br>
ECS-RS400-A is based on the ATI RS400 northbridge chipset (MCH) which does not support dual-core CPUs (Pentium D), see <a href="http://www.digit-life.com/articles2/mainboard/ati-xpress-200-ie-chipset.html" target="_blank">here</a>.<br><br><div style="margin:20px;margin-top:5px;">
<div class="smallfont" style="margin-bottom:2px;">Quote:</div>
<table border="0" cellpadding="6" cellspacing="0" width="99%"><tr><td class="alt2" style="border:1px inset;">RS400 northbridge:<br>
* Supports Intel Celeron D, Pentium 4, Pentium 4 Extreme Edition with the 533/800/1066 MHz FSB (<b>dual core processors are not supported</b>, FSB works quite well at 1066 MHz, but this clock is officially not supported either)</td>
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