Does this mean that if you want to buy 990 chipset mobo and you do not intend to/will not use SLI you still pay $5 tax to NV?
That's sick.
We (I) don't know if the structure of the licensing fees for AMD platforms are the same as those Nvidia implemented for the Intel platforms, but if they are similar then yeah that is the basic gist of it.
Buying an AMD mobo, even if you don't plan to stick a single Nvidia video card in it, will result in a net transfer of wealth from you to Nvidia by way of the licensing rights Nvidia has negotiated with the mobo maker.
It is sheer marketing brilliance on behalf of Nvidia's lawyers, you got to give them that. They managed to create a revenue enhancement opportunity from something that already existed.
You can bet that had there been a way to get Physx licensed on a per-mobo level rather than the customer expecting it for free via the drivers then we'd all have Physx enabled (of your mobo is licensed for it) regardless whether your system contains an AMD vid card or not.
Could you imagine if Microsoft got hold of this revenue model? Not only would you need to pay for the software if you wanted to run Windows 7 or Office 2010, but you'd need to buy a mobo or cpu that was Microsoft licensed as well.
And if you elected to run Linux or open-office instead, well too bad, you already paid Microsoft a licensing fee when you bought your hardware so they could care less.