    1. My understanding is, while compact turbo 3090s might fit, running dual high-thermal-output GPUs in our mid-tower Aurora sounds like an impending disaster. Others have had problems with the absurd amount of heat from 3090 in an Aurora. 2. RTX 3090 does support NVLink. However, because of how finicky the thermal management issue is with these cards, I'm afraid currently the only way to get a reliable RTX 3090 NVLink gaming rig is one prebuild from the factory. 3. You can sell your rig in the second-hand market, and order a new R11 with an air-cooled 3090 (already available), with an Asetek liquid-cooled 3090 (exp. Dec 2020), with dual-air-cooled 3090 (uncertain if ever available), or with an Asetek liquid-cooled 3090 Ti (exp. 2021). If you have some emotional attachment to your rig and have to upgrade, there are some choices: a. Look for someone selling R11's OEM RTX 3090 (Dell's proprietary shorter card) when people rush to buy 3090 Ti (exp. Spring 2021). b. Buy a single-blower-fan 3090 (e.g. Gigabyte 3090 Turbo). c. Wait for a dual-fan 3090 from Nvidia board partners that's 10.5" or shorter (exp. 2021) d. Wait for 3090 Ti (exp. Spring 2021). e. Wait for Asetek's consumer-market liquid-cooled 3090 (exp. 2021). The bottom line is that, while the new RTX 30-series generated all the hypes because of Nvidia's paper launch tactic, they aren't an "ultimate" product. They are transitional products. They use outdated Samsung 8nm nodes which have been discredited in AI and server applications due to instability. Nvidia's new TSMC 7nm nodes-equipped RTX GPUs are expected to launch in 2021 or 2022. They are said to be much more stable and better in many way than Samsung 8nm nodes. (Although for the purpose of gaming, that just means a little less heat and more FPS.) There are also rumors that Nvidia's 5nm GPU chip (nodes likely also made by TSMC) research is approaching fruition. Nvidia is just sandbagging, waiting for their intelligent unit's report on the possible launch date of AMD's 5nm GPUs, and then schedule their own launch of 5nm GPU a few weeks earlier than AMD. Beware that the 5nm GPUs will likely demolish these 8nm RTX 30-series in terms performance. It's a great time for us technophiles to be alive, my friend. But it's the wrong time to build high-end gaming PCs.
PC Specs: Background: I found this information on the Dell site: Question:
Aurora R10, RTX 3090, upgrade