I had a Gigabyte K8N series MoBo that worked stably with a mild 15% on a Sempron and generic RAM.<br />
Here are a couple Gigabytes that have 5 pci slots. Essentially the main diff is the Northbridge chipset.... depends how you feel about nForce. Price seems decent to me.<br />
<a href="http://www.newegg.com/Product/ProductCompare.asp?Category=20&Brand=1314&N=2010200022+50001314+1070907494&Submit=ENE&Nty=1&Manufactory=1314&SubCategory=22&CompareItemList=N82E16813128292%2CN82E16813128259" target="_blank">http://www.newegg.com/Product/Produc...82E16813128259</a><br />
Hope this helps a little.
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