It was never double the actual firepower, it simply freed resource loads of specific features (hairworks,physx etc etc) of Nvidia GPU cards to allow more performance headroom.
Which Nvidia has a terrible history of eventually killing off and making obsolete.
RIP 3D Vision, SLI and Hairworks.
Would be nice for a flight sim to support NVLink and whatever the AMD equivalent tech (crossfire?) is for once. Even though the bottleneck is always CPU performance limitations.
I remember being stoked about Crysis 1 back in the day supporting SLI, and it actually made performance worse to where you were better off running single GPU mode because of FPS inconsistency and visual artifacts. I had dual GTX 9800s back then. It was always the same for the titles I played Crysis 1, GTA4, the software was just never fully optimized to full take advantage of the dual GPU tech. I see why single card performance was always the better much more stable option, especially with these monstrous fire breathing modern GPUs we have now.
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