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AMD Radeon Software support for 32-bit Windows

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Because Radeon Software 18.10.1 does not support 32-bit Windows, 4gamer.net (a Japanese video game website) asked AMD, and AMD confirmed that Radeon Software support for x32-bit Windows operating systems has been moved to a legacy support mode.

https://www.amd.com/en/support/kb/faq/pa-120

https://www.4gamer.net/games/022/G002212/20181018086/

 

The final Radeon Software for 32-bit Windows is 18.9.3. And Nvidia released R390 U8 at September 2018.

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AMD offers 32-bit version of Radeon Pro Software for Enterprise 18.Q4.1 which supports WDDM 2.4.

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NVIDIA released R390 U10 for 64-bit version of Windows. The release notes didn't mention support for 32-bit Windows, so I think this is the end. 

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I wonder how much effort it actually takes to provide 32-bit builds. Is it just the compilation part or are there also significant chunks of processor specific code?

Graphics cards with 2 GB of video RAM were already common in low-mid price range 5 years ago. So that takes the half of the 32-bit addressable space, so one can use 2 GB RAM max. 4 GB card would take that number down to zero. :P

Then there's PAE, which, AFAIK, on today's Windows can only be utilized by unofficial patches to the kernel (assuming drivers in use on the particular system aren't buggy).

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It is necessary to fix security vulnerabilities in nvlddmkm.sys, and make sure the driver works on Windows 7, 8.1, 10 (1507~1709).

 

Besides, the release notes mention that NVIDIA display driver constrains Total Available Graphics memory to just below 4 GB for GeForce GPUs with 2.75 GB or less of video memory.

.

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