Mainly because your 'fix' involves using the "driver settings for dummies" option in the nvidia control panel. Using the "advanced 3D image setting" or using the falloutNV nvidia profile brings back the horrible lag. This trick increased performance by 100%. Especially in populated areas like the Crimson Caravan Company. I use to have horrible slow downs outside in the wasteland. Under "3D settings" click "Adjust image settings with preview" Now make sure "Let the 3D application decide" is checked. Haley Cooper Posts: 3490 Joined: Wed 11:30 am Selecting the generic "Let the application decide" causes lower quality settings to be used. I use a custom profile for FNV because I want to force "High Quality" textures and force a certain level of antialiasing. This may only be due to the fact that the GTX275 is a very competent and fast GPU. Setting to "High Perfromance" mode does not make any difference that I can observe in the performance of FalloutNV. I have set my GTX275 to use a custom profile and it does use the "Adaptive" power mode. The GPU (when it can support this feature) is smart enough to know the difference between 2D and 3D modes and can detect what amounts to an idle mode even when in 3D mode. Ordinarily, when the GPU is in 2D mode such as when displaying your Windows desktop a reduced clock speed can be used but when in 3D mode the GPU will use the maximum clock speed. "Adaptive Mode" allows a GPU to reduce clock speeds to save power and reduce heat when the maximum clock speed is not needed. Some GPUs can manage and adjust their own clock speeds.
You will only have a "Power Management Mode" for GPUs that can support it.
I can't find any power management setting under global settings.
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