Now that we've had ample time to digest the performance numbers from AMD's new Socket AM2, it's time to take a closer look at the differences between DDR1 and DDR2. In order to get as close to an apples to apples comparison as you can get, Hardware Zone has overclocked an Athlon 64 FX-60(S939) to 2.8GHz and benchmarks it against AMD's Athlon 64 FX-62(AM2) and Athlon 64 X2 5000+(AM2) processor.
"Remember, at a clock speed of 2.8GHz, the FX-60 is almost identical to the new FX-62 processor, with the exception that the former uses DDR memory while the FX-62 obviously uses DDR2 memory. In essence, this is an FX-62 on Socket-939 versus an FX-62 on Socket AM2. Since the upper echelon of AM2 processors support memory frequencies as high as DDR2-800, we used low latency Corsair XMS memory of this speed grade whereas the Socket-939 based FX-60 was paired with low latency DDR-400 memory."
AMD Athlon 64 FX-62: DDR2 versus DDR1