Although dual-core computer processor technology is just hitting the mainstream market, the prices of dual-core processors keep going down and speed keeps going up. Is it time to make the switch to a dual-core? Geeks.com, popular online retailer, sent us one of their dual-core offerings, an AMD Athlon 64 X2 3800+ processor. Will it offer a good combination of speed and value, especially when compared to its single-core cousins? Let’s find out.