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Message: [QUOTE="Chuck Walbourn [MSFT], post: 10107993"] No. Unlike common misconceptions 32bit applications and 32bit games do Small clarification: on x64 editions of Windows, LARGEADDRESSAWARE 32-bit applications actually have access to 4 GB of memory space instead of the 3GB limit on Windows XP booted in /3gb mode. Once you expect a single application to use more than 2 GB of physical RAM, x64 editions make sense. You can probably utilize 3-4 GB with multiple memory-intensive things running at once, but to get utilization out of 4 GB+ of physical RAM you really need to be running an x64 OS and memory-intensive appliations that are either 32-bit LARGEADDRESSAWARE or 64-bit native. How quickly developers will regularly provide x64 aware versions of their games really depends on how many users choose x64 editions. Right now, traditional memory-hungry applications (CAD, video editing, etc.) are pushing x64 native versions. Games have traditionally followed this path over time. [/QUOTE]