What is the minimum precision requirement for KataGo? Is FP8 or FP4 viable?

[Garbage123King]

From the diagrams I’ve seen online, the FP4 computing power of the 50-series GPUs is about 16 times that of FP32. This seems quite enticing for self-play.

[HackYardo]

FPx refers to float point number whit x precisionn.
That's say, more speed, less quality, and vice versa.
For rush examples, wine-rate 58%:

• FP4: = 0.50
• FP8: = 0.58
  score lead 0.5:
• FP4: = 0
• FP8: = 0.5

As u can see, FP4 will always judge a game as draw, no loss no win.

[Garbage123King]

FPx refers to float point number whit x precisionn. That's say, more speed, less quality, and vice versa. For rush examples, wine-rate 58%:

• FP4: = 0.50
• FP8: = 0.58
  score lead 0.5:
• FP4: = 0
• FP8: = 0.5

As u can see, FP4 will always judge a game as draw, no loss no win.

I think the truth is:

Results of mapping all FP4 numbers to (0,1)

From largest to smallest:

• 6 → 1.0
• 4 → 0.8333…
• 3 → 0.75
• 2 → 0.6666…
• 1.5 → 0.625
• 1 → 0.5833…
• 0.75 → 0.5625
• 0.5 → 0.541666…
• 0 → 0.5
• -0.5 → 0.458333…
• -0.75→ 0.4375
• -1 → 0.41666…
• -1.5 → 0.375
• -2 → 0.3333…
• -3 → 0.25
• -4 → 0.1666…
• -6 → 0.0