March 2009 Direct X Runtimes
Get em while they're hot!
Download DirectX End-User Runtime Web Installer March 2009 9.26.1590 - This utility will help you easily install the DirectX 9.0c updates - Softpedia
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Download details: DirectX Redist (March 2009)
BTW It looks like it updates both DX9 and DX10
I don't get it. What kind of updates are these? Isn't DirectX run on the hardware, and not necessarily software? Updating your DX shouldn't have an effect on the performance...I'm confused. Someone clarify?
The updates are for the DLLs and other runtimes for DirectX. I wouldn't know about any performance improvements that come from these updates, but I know that some software will refuse to run properly without DX updates (e.g. the Power Supply test in OCCT). Game DVDs normally bundle a set of DirectX runtimes so people don't complain to tech support about cryptic DLL errors, but getting them from M$ directly gives you a more up to date version.
Although hardware and their drivers embed SUPPORT for DirectX, the DX itself is bundled in Windows. As evidence, this is why Windows XP + GeForce 8/9 / Radeon HD does not give you DX10 gaming, because the Windows doesn't support it (the reason for no DX10 on WinXP is a whole other debate).
Check out this outdated but still valid overview: Just what is DirectX?
I'm no guru on DX however, so I won't mind if someone corrects / adds to / totally rips apart this post ;)
Direct X is the software that runs on your hardware. IE none of your directX games ( pretty much all of them) won't run without it.... MS releases updates on a pretty regular schedule that has fixes etc so It's a good idea to update when they are released.
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