It is a bug. RealBench 2.56 needs an update. It does not know how to correctly determine the CPU speed or the BCLK speed.multi and Bus
Some common timers within Intel CPUs run at 24.0 MHz or 19.2 MHz. Instead of RealBench determining the correct BCLK speed, it finds one of these timers and takes a wild guess that this must be the BCLK speed. After that it takes another wild guess. The CPU is running at 3693.4 MHz so ...
3693.4 MHz / 24.0 MHz = 153.9
It rounds that up to 154 and thinks that the CPU must be using the 154 multiplier which of course is impossible.
The 10900K uses a base multiplier of 37.
3693.4 MHz / 37 = 99.8 MHz
That looks pretty close to the actual BCLK speed that your CPU is running at.
Long story short, the multi and bus reported by RealBench are two meaningless numbers. Ignore those numbers.