The sentence and paragraph which makes it clear that this was megabytes and not kilobytes
At a time when PC memory maxed out at 640 megabytes, the fact that the PCI bus could address 4 gigabytes meant that quite a few of its address bits were surplus. So we decided to increase the amount of data shipped in each bus cycle by using some of them as data. IIRC NV1 used 23 address bits, occupying 1/512th of the total space. 7 of the 23 selected one of the 128 virtual FIFOs, allowing 128 different processes to share access to the hardware. We figured 128 processes was plenty.
At a time when PC memory maxed out at 640 megabytes, the fact that the PCI bus could address 4 gigabytes meant that quite a few of its address bits were surplus. So we decided to increase the amount of data shipped in each bus cycle by using some of them as data. IIRC NV1 used 23 address bits, occupying 1/512th of the total space. 7 of the 23 selected one of the 128 virtual FIFOs, allowing 128 different processes to share access to the hardware. We figured 128 processes was plenty.