I want to upgrade my pc. I found someone selling a used MSI Radeon RX 6900 XT, and someone else selling a used Nvidia RTX 3080 Ti for the same price. Which one should i get? I do not care about dlss

Llama 4 Scout (changed mind)

Vote: MSI Radeon RX 6900 XT

After considering the arguments from other models, I am convinced that the MSI Radeon RX 6900 XT is the better choice. The key points that swayed my decision are the 16GB of VRAM in the RX 6900 XT compared to the 12GB in the RTX 3080 Ti, which provides better future-proofing for high-resolution gaming and future titles. Additionally, the RX 6900 XT offers comparable or slightly better rasterization performance than the RTX 3080 Ti, especially at 1440p and 4K resolutions. The power efficiency and lower heat output of the RX 6900 XT are also significant advantages. Since I do not care about DLSS, the Nvidia advantages in upscaling and ray tracing are not relevant to my decision.

GPT-5.4

Vote: MSI Radeon RX 6900 XT

I’m keeping my vote on the RX 6900 XT. The opposing case for the 3080 Ti was not persuasive because it mainly asserted “better overall performance” without addressing the user’s stated priorities. If DLSS is irrelevant, then Nvidia’s biggest gaming advantage is removed, and the remaining meaningful edge is ray tracing. For standard rasterized gaming, the 6900 XT is generally in the same class as the 3080 Ti and often slightly ahead. At the same used price, that makes the extra 16 GB vs 12 GB VRAM a major tiebreaker for longevity, high-res textures, and avoiding future VRAM pressure. The pro-A arguments from the other models reinforced the strongest point: equal price plus no DLSS interest means raw raster performance and VRAM matter most. On those criteria, the 6900 XT is usually the smarter used buy. I would only switch to the 3080 Ti if the buyer specifically cared about ray tracing, CUDA workloads, NVENC, or Nvidia-specific software. Based on the question as asked, the RX 6900 XT remains the better fit.

Grok 4.1 Fast

Vote: MSI Radeon RX 6900 XT

I maintain my vote for A (MSI Radeon RX 6900 XT). The single vote for B from Llama 4 Scout claims superior overall performance for the 3080 Ti, especially in ray tracing, but overlooks that the user doesn't care about DLSS—Nvidia's key differentiator—and rasterization (core gaming) sees the 6900 XT matching or exceeding the 3080 Ti by 5-10% at 1440p/4K per TechPowerUp and Hardware Unboxed benchmarks. The 16GB VRAM vs. 12GB is a massive edge for future-proofing in VRAM-hungry 2024+ titles at high resolutions/mods, where the 3080 Ti stutters. AMD's FSR covers upscaling needs adequately. Other A votes (GPT-5.4, DeepSeek, Claude, Gemini) reinforce this with power efficiency (6900 XT ~300W vs. 3080 Ti ~350W+), better heat, and equal pricing making AMD the value king for pure gaming upgrades. No arguments swayed me—B's RT focus is niche without DLSS relevance.

DeepSeek V3.2

Vote: MSI Radeon RX 6900 XT

My vote remains for the RX 6900 XT. The overwhelming consensus among other models reinforces my original position: with DLSS off the table, the 6900 XT's 16GB VRAM provides crucial future-proofing for high-resolution gaming, and its raw rasterization performance matches or exceeds the 3080 Ti. The lone argument for the 3080 Ti focused on ray tracing and 'advanced features,' but the user didn't express interest in these. Without that explicit need, the VRAM advantage and power efficiency of the 6900 XT are more decisive for a long-term gaming upgrade at the same price. No new information emerged to challenge this core value proposition, so my position remains unchanged.

Claude Opus 4.6

Vote: MSI Radeon RX 6900 XT

I'm maintaining my vote for the RX 6900 XT. The deliberation strongly reinforced this position — 5 out of 6 models voted A in Round 1, with only Llama 4 Scout voting B. Llama's argument for the 3080 Ti cited "better overall performance" and ray tracing, but this is simply not accurate when DLSS is off the table. In raw rasterization — which is what matters for the vast majority of gaming — the 6900 XT matches or beats the 3080 Ti across resolutions. The 3080 Ti's ray tracing advantage is real but modest, and ray tracing without DLSS tanks frame rates on both cards, making it impractical anyway. The consensus across nearly all models highlights the same key advantages: **16GB vs 12GB VRAM** — This is arguably the most important factor for a used card purchase in 2025-2026. Games are increasingly VRAM-hungry, and 12GB is already showing its limits at 4K with ultra textures. The extra 4GB meaningfully extends the card's useful lifespan. **Equal or better rasterization** — Multiple independent benchmark sources confirm the 6900 XT trades blows with or edges ahead of the 3080 Ti in traditional rendering. **Better power efficiency** — Less heat, less power draw, less PSU stress. With DLSS explicitly removed from consideration, Nvidia's strongest differentiator is gone. The RX 6900 XT is the superior choice at the same price point for a gaming-focused upgrade.

Gemini 3.1 Pro

Vote: MSI Radeon RX 6900 XT

I am maintaining my vote for the RX 6900 XT. Llama 4 Scout correctly points out that the RTX 3080 Ti has superior ray tracing performance. However, without DLSS to offset the massive performance hit that ray tracing introduces, the 3080 Ti will often struggle to maintain high frame rates with RT enabled anyway. When we look at pure rasterization (non-ray-traced gaming), the RX 6900 XT matches or exceeds the 3080 Ti at 1440p and trades blows at 4K. The decisive factor, as noted by almost all models here, is the VRAM. 12GB on the 3080 Ti is already becoming a bottleneck in modern, poorly optimized titles at higher resolutions. The 16GB of VRAM on the 6900 XT gives you much better longevity and peace of mind. Combine that with better power efficiency and less heat generation, and the AMD card is simply the smarter, more robust long-term investment for a pure gaming rig when DLSS isn't a factor.

Final Summary

The AI Roundtable reached a unanimous verdict in favor of the MSI Radeon RX 6900 XT, though the debate began with Llama 4 Scout as a lone holdout for Nvidia. While Llama initially prioritized general 'advanced features,' the rest of the group—led by the technical breakdowns of Claude Opus 4.6 and GPT-5.4—argued that removing DLSS from the equation strips the 3080 Ti of its primary armor. By the second round, the sheer weight of the 16GB VRAM advantage and superior power efficiency forced a total consensus, with Llama 4 Scout gracefully conceding the point.

All 6 models agreed on "MSI Radeon RX 6900 XT" after discussion

Strongest Arguments

• MSI Radeon RX 6900 XT: The 6900 XT features 16GB of VRAM compared to the 3080 Ti's 12GB, providing a critical buffer for high-resolution textures and future-proofing in modern, memory-intensive games.
• Nvidia RTX 3080 Ti: The RTX 3080 Ti offers significantly better ray tracing performance and access to the specialized CUDA ecosystem for productivity tasks.

Key Turning Points

• Llama 4 Scout realized that the 3080 Ti's ray tracing advantage is largely offset by the lack of DLSS to maintain playable frame rates.
• The group collectively identified the 4GB VRAM gap (16GB vs 12GB) as the decisive factor for a used card purchase in the current gaming landscape.