Hence the use of the word "effective"
If you request 12GB of texture data for your game, but SFS makes it so that to get the same visual result on screen, you only need 2.5x less than that 12GB, which leaves you with only 4.8GB of data to load due to efficiency of SFS, what would you call such speed?
The SSD speed isn't changing from 2.4GB/s and neither is the compressed speed changing from 4.8GB/s, but you know what has changed? You've gotten 2.5x more effective work done in way less time, it's on screen, and it only took Series X 1 second to do it with SFS.
Microsoft actually HAS said this, and has been saying this from the start, but nobody seemed to take them serious when they said it. They've said from the start Sampler Feedback Streaming gives us a multiplier effect on our SSD bandwidth and I/O.
This guy below works for Microsoft's Advanced Technology Group. He's Graphics R&D at Microsoft and is personally working on Xbox's Texture Compression stuff and other graphics technologies, such as Sampler Feedback Streaming. So he personally has said this.
Here are more examples from Microsoft. Jason Ronald said this last year July.
When we set out to design the Xbox Series X, we aspired to build our most powerful console ever powered by next generation innovation and delivering consistent, sustained performance never before seen in a console with no compromises. To achieve this goal, we knew we needed to analyze each...
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The coalition technical director said this.
Here is Jason Ronald saying it's a massive boost to I/O in the inside Xbox Series S video revealing Series S. What do we think he means when he says "massive leap in IO and memory efficiency"
Here again they said it as early as March of Last year. They've always been saying it, but people were so caught up in how impressive Sony's solution is and how much faster their SSD is compared to the Series X SSD that people laughed off Microsoft talking about Sampler Feedback Streaming as just marketing or PR, or "power of the cloud" talk. But these are the engineers and the technical people who have been saying this stuff now and shouting it from the roof tops, not just the PR folks.
[Editor’s Note: Updated on 10/21 at 11AM to ensure it is now reflective of the capabilities across both of our next-gen Xbox consoles following the unveil of Xbox Series S.] As we enter a new generation of console gaming with Xbox Series X and Xbox Series S, we’ve made a number of technology...
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