I think your Athlon is the 200 MHz FSB, DDR400, PC3200 type by the way. I heard there was a 333 3200 at one point, but I've never seen one.
You will se absolutely '0' speed improvement. The 3200 memory can clock in at 200 MHz FSB (400 MHz if you count the rising and falling clock cycle and being able to do a transaction on either end), but if your BUS is running at 166 Mhz (333 Mhz DDR), so add ing 3200 memory to a 166 bus will make it run at 2700 speeds. But if you have a 200 MHz, you have to use 3200 based memory if you plan to run your CPU at normal speed.
-S
PS. 2700 memory will not run on a 200 MHz based system, which is probably what you have.
PPS. Had to edit this one - noticed that you probably have a 200 MHz based system.
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