REDDIT · REDDIT// 18h agoBENCHMARK RESULT

3090 Swap Buys VRAM, Trims Gaming Edge

This post is a practical hardware tradeoff question: swap a 16GB RTX 5070 Ti for a used RTX 3090 mainly to gain 24GB of VRAM for larger local-LLM contexts and fewer offload compromises. The poster already likes gaming performance and is asking whether the extra memory headroom is worth giving up newer Blackwell-era features and efficiency.

// ANALYSIS

Hot take: if the trade is close to dollar-neutral and your main pain point is VRAM, the 3090 is a rational AI-first upgrade; if gaming smoothness, power efficiency, and newer DLSS/frame-gen features matter, keep the 5070 Ti.

–The 3090’s 24GB GDDR6X is the real upside here; NVIDIA’s official 3090 family page lists 24 GB GDDR6X, while the 5070 Ti family page lists 16 GB GDDR7.
–For local LLMs, that extra 8GB can matter more than raw compute when you’re trying to hold larger contexts or reduce layer offloading.
–The 5070 Ti is newer Blackwell hardware with DLSS 4 / Multi Frame Generation, so it is the better gaming card on paper.
–A used 3090 carries the usual risks: age, warranty uncertainty, power draw, and thermal wear.
–If you are not regularly running into VRAM limits today, this is more of a preference swap than a clear upgrade.
–Sources: https://www.nvidia.com/en-us/geforce/graphics-cards/30-series/rtx-3090-3090ti/ and https://www.nvidia.com/en-us/geforce/graphics-cards/50-series/rtx-5070-family/

// TAGS

gpunvidiartx3090rtx5070tivramlocal-firstgamingblackwellampere

DISCOVERED

18h ago

2026-05-02

PUBLISHED

21h ago

2026-05-02

RELEVANCE

8/ 10

AUTHOR

simracerman