I have (4) 1gb sticks of Crucial Ballistix 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Desktop Memory. Willing to sell for $60 shipped in good working order. These sticks of memory have a lifetime warranty with the manufacturer so there's no need to worry about buying bad memory. I pulled these from my working computer because my new memory board took a different type. Only used them for 6 months. These sticks of memory do have the heat sinks on both sides so no worries about heating issues.