![]() Windows were handled separately in layers, keeping their contents in memory even when covered up by other windows. With DWM, which powered Aero in Vista/7, the screen is rendered in a 3D space, composing each window as a separate texture, so to speak. Windows obscured by other windows had to be completely redrawn when exposed. The only difference is, Vista and 7 had the ability to render the desktop in the traditional GDI window painting method (non-composited) which relied on the CPU, however it was impossible to render many effects this way without issues. Windows 7 system requirements - Microsoft Windows And in fact, running the full Windows 7 experience (accelerated desktop/Aero) did require a WDDM driver - so, basically, the hardware requirements stayed the same, minus the ability to run the unaccelerated driver set known as XPDM: Windows 8 system requirements - Microsoft Windowsįor the record, Microsoft did not state that anything running Windows 7 would run Windows 8 - they said the hardware requirements would be the same, or lower. The minimum requirements for running Windows 8 includes a video chipset with WDDM 1.0 (at least) support: ![]() Unfortunately,if you bought or built a machine with the 915GM chipset after that date (and I believe that shuttle of yours originally hit the market near the end of 2005), that's simply going to need a video card upgrade to run Windows 8, or you'll have to stick with Windows 7. ![]() Given the 945GM started showing up in mid/late 2005, and the 915G/GM was out at the beginning of 2004, that chipset predates Vista by 2 years. ![]() Given Windows 8 is now fully hardware-accelerated for the UI, you can't get by with the old legacy XPDM driver subsystem anymore, because that doesn't support the things Windows 8's UI now require. ![]() Graphics - Older Intel® graphics controllers and Microsoft Windows 7* operating system XPDM driver support does not exist in Win8, and Intel did not release an updated WDDM driver (and, in fact, didn't update it for WDDM 1.0 in Vista, so I guess it's no surprise they didn't write a WDDM 1.1 for Win7 or WDDM 1.2 for Win8). Well the blame is accurately stated - the 915GM driver does not support WDDM, only XPDM. ![]()
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