Summary of Reddit Comments on "Nvidia Titan RTX":

GeForce RTX 3080

• Offers significant performance boost over previous generation cards like 2080Ti.
• Efficiency might not be as good compared to 2080Ti in some cases.
• Considered a good buy compared to 3090 for future-proofing.
• High demand expected, might be hard to get initially.

GeForce RTX 3090

• Considered more of a Titan than a gaming card due to high price and power consumption.
• Performance increase over 3080 is minimal for the price difference.
• Marketing for 8K gaming considered misleading.
• High power consumption and issues with drivers reported.

Titan AI (AI) / 4090

• Questionable need for a new high-end card due to supply shortages and existing options.
• Power requirements and pricing draw criticism.
• Some users joke about the extreme specs and anticipated price.
• Concerns raised about multiple SKU confusion and usefulness.

General GPU Comments and Observations

• Some users are content with current GPUs and don't see a need for new models.
• Criticism regarding Nvidia producing more high-end cards amidst supply shortages.
• Mixed reactions to the increasing number of SKUs and high power consumption.
• Comments on possible bottlenecks, power requirements, and future gaming demands.

Recommendations and Predictions

• Some users suggest waiting for future 3080 variants or price drops.
• Speculation on potential upgrades, future GPU performance, and AMD competition.
• Criticism of Nvidia's marketing strategies and product justifications.
• Jokes and memes about potential GPU features and pricing.

Buyer Recommendations, PSU Compatibility, and Technical Questions

• Recommendations on holding onto current GPUs, selling for better models later on.
• Concerns raised about PSU compatibility, performance improvements, and vRAM needs.
• Technical questions regarding PCIe compatibility, vRAM capacity, and usage for machine learning.

In summary, the Nvidia GeForce RTX 3080 is praised for its performance increase over previous models and value for money. The GeForce RTX 3090 faces criticism for high power consumption, misleading marketing, and minimal performance gains for the price. The Titan AI (possibly named 4090) has drawn mixed reactions with concerns about power requirements, usefulness, and possible oversupply of SKUs. Users have diverse opinions on future upgrades, GPU performance, marketing strategies, and technical aspects like PSU compatibility and vRAM capacity.