Summary: This X4 600e was bought to replace a dual core and has done so while meeting all expectations. The low power allows for a little overclocking headroom without raising the electric bill. However, at stock speed and voltages the extra two cores make a noticable difference over the dual core cpu. The price I paid here on Ebay was a snag. Shopping around the web at popular etailers and then checking Ebay saved me about $45.00 USD.