Among the major changes in this version Futuremark points out the termination of checking out keyboard focus while playing the demo and repetitive benchmark, memory of previous user-defined screen resolutions, proper detection of multiple graphics processors in the same system (multi-GPU configurations) even with the exclusion of SystemInfo. It will also prevent Windows from going into Sleep mode when you run the tests.
The upgrade also brings generally better compatibility with various configurations and corrections for several identified bugs, such as those with a HUD-increment or "leakage" of memory and textures, which effected stability during consecutive long-term tests in the loop. The new version of 3DMark 11 can be downloaded from here.
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