Most people don't realize that Nvidia is much more of a software company than a hardware company. CUDA in particular is like 90% of the reason why they are where they are while AMD and Intel struggle to keep up.
I have no experience with PCI-E 5 cables, but I've a PCI-E 4 riser cable from Athena Power that works just fine (and that you can buy right now on Newegg). It doesn't have any special locking mechanism, so I was concerned that it would work its way off of the card or out of the mobo slot... but it has been in place for years now with no problem.
The "away from motherboard expansion card slots feature" isn't particularly uncommon on cases. One case that came up with a quick look around is the Phanteks Enthoo Pro 2. [2] I've seen other case manufacturers include this feature, but couldn't be arsed to spend more than a couple of minutes looking around to find more than one example to link to.
Also, there are a few smaller companies out there that make adapters [3] that will screw into a 140mm fan mounting hole and serve as an "away from motherboard" mounting bracket. You would need to remove any grilles from the mounting hole to make use of this for a graphics card.
[0] https://www.newegg.com/athena-power-8-extension-cable-black/...
[1] https://www.newegg.com/Athena-Power/BrandStore/ID-1849
[2] https://phanteks.com/product/enthoo-pro-2-tg
[3] Really, they're usually just machined metal rectangular donuts... calling them "adapters" makes them sound fancier than they are.
Can't put four 4090s into your PC if every 4090 is 3.5 slots!
Nvidia has internal access to the new card way ahead of time, has aerodynamic and thermodynamic simulators, custom engineered boards full of sensors, plus a team of very talented and well paid engineers for months in order to optimize cooler design.
Meanwhile AIB partners is pretty much kept in the blind until a few months in advance. It is basically impossible for a company like EVGA to exist as they pride themselves in their customer support - the finances just does not make sense.
https://www.electronicdesign.com/technologies/embedded/artic...
Totally agree with the software part. AMD usually designs something in the same ball park as Nvidia, and usually has a better price:performance ratio at many price points. But the software is just too far behind.
But the business software stack was, yes, best in class. But it's not so for the consumer!
Also aren't most of the business cards made by Nvidia directly... or at least Nvidia branded?
Since then, Nvidia is locked in a very strange card war with their board partners, because Nvidia has all the juicy inside details on their own chips which they can just not give the same treatment to their partners, stacking the deck for themselves.
Also, the reason why blowers are bad is because the design can't really take advantage of a whole lot of surface area offered by the fins. There's often zero heat pipes spreading the heat evenly in all directions, allowing a hot spot to form.
It's just not their main business model, it's been that way for many many years at this point. I'm guessing business people have decided that it's not worth it.
Saying that they are "resellers" isn't technically accurate. The 5080 you buy from ASUS will be different than the one you buy from MSI.