TH: "Our 2004 article pointed out weaknesses in the once-popular single-gigabyte configurations. But 512 MB and smaller modules are now a distant memory. It wasn't long after that 2 GB became the performance standard, and by 2007, 4 GB kits could be found in all but the lowest-cost systems. Is it time to take the next step, to 8 GB or more? More importantly, were 4 GB modules ever really needed for games and everyday applications? And with the 32-bit addressing limit of 4 GB making only 3 GB available to many users, should everyone switch to a 64-bit operating system simply to support higher capacities?"