Are you by any chance also still using a years-old version of Daz Studio? For Iray rendering, an upgrade to the latest version will then give you a more than 2x speed boost, due to all the Iray version changes over the past three years or so. There are also now the NVIDIA Studio drivers for Daz (use with NVCleanstall) which might help. The Daz plugin Scene Optimizer will give you a further big speed boost. Add all that together, and it may enable you to keep using your current card, until the graphics-card drought ends later in 2021.

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Learn the Secrets of Poser 11 and Line-art Filters.