Speed of common technologies (for reference)

[chrisNova777]

USB1.1        1.5MB/s
ISA 8-bit      2.39 MB/s
SCSI (aka SCSI-1)   5 Mbps   n/a
ISA 16-Bit      8.33 MB/s
SCSI-2   5 Mbps   10 MBps
100BASE-T         12.5 mb/s
SCSI-2, Fast SCSI   10 MBps   20 MBps
ATA-33: 33MB/s *** (powermac g3/g4 yikes disk interface)
EISA 32bit          33.32 MB/s
NuBus 10 MHz   40 MB/s
SCSI-3, Ultra SCSI   20 MBps   40 MBps
FW400      50 MB/s *** (real world: 33 MB/s)
USB2.0 60 MB/s  *** (real world: 25MB/s)
ATA-66 : 66MB/s *** (most powermac g4 disk interface)
32bit CardBus 1   66.66 MB/s
NuBus90 20 MHz   80 MB/s
SCSI-4, Ultra2 SCSI   40 MBps   80 MBps
FW800 80 MB/s ***  (real world: 45MB/s)
ATA-100: 100MB/s ***
gigabit ethernet   125 MB/s
32bit CardBus 2   133.33 MB/s
PCI 32bit/33MHz   133.33 MB/s  (most short pci cards)
ATA-133: 133MB/s ***
SATA150 150MB/s *** (real world burst:115MB/sec ... sustained: 58 MB/sec )
SCSI Ultra3 SCSI 160MB/s
PCI 32bit/66MHz   266.7 MB/s
PCI 64bit/33MHz   266.7 MB/s (most mac pci slots)
AGP 1×           266.7 MB/s
SATA300 (sata2) 300 MB/s ***
SCSI Ultra-320 SCSI 320 MB/s
SCSI SAS 375 MB/s
AGP 2×           533.3 MB/s (sawtooth/gigabit)
PCI-X 66    66 MHz    533 MB/s
SATA600 (sata3) 600 MB/s ***
USB3.0 600 MB/s ***
SCSI Ultra-640 640 MB/s
PCI 64bit/100MHz   800 MB/s
AGP 4×            1.067 GB/s (digital Audio / Quicksilver  / MDD)
PCI-X 133       1.067 GB/s
thunderbolt 1.250 GB/s ***
PCIE 1.0 (×8)     2 GB/s
PCIE 2.0 (×4)     2 GB/s
AGP 8x      2.133 GB/s
PCI-X 266 2.13 GB/s
PCIE 1.0 (×16)    4 GB/s
PCIE 2.0 (×8)     4 GB/s
PCI-X 533 4.26 GB/s
PCIE 2.0 (×16)    8 GB/s
PCIE 3.0 (×16)    15.75 GB/s

[chrisNova777]

USB 2.0 was only capable of a theoretical maximum data transfer rate of 480 megabits per second, while USB 3.0 was capable of 5 gigabits per second, or over 10 times faster. ... The data transfer speed of USB 3.1 is incredible – 10Gbps. This rivals the speed of Ethernet and the original Thunderbolt.Dec 1, 2015

[chrisNova777]

BUS    Bandwidth
PCI    1056 MBps
AGP 8x    2.1 GBps
PCIe 1.0 / x4    1 GBps
PCIe 1.0 / x8    2 GBps
PCIe 1.0 / x16    4 GBps
PCIe 2.0 / x4    2 GBps
PCIe 2.0 / x8    4 GBps
PCIe 2.0 / x16    8 GBps
PCIe 3.0 / x1    1.97 GBps
PCIe 3.0 / x4    3.94 GBps
PCIe 3.0 / x8    7.88 GBps
PCIe 3.0 / x16    15.75 GBps
PCIe 4.0 / x1    3.94 GBps
PCIe 4.0 / x4    7.88 GBps
PCIe 4.0 / x8    15.75 GBps
PCIe 4.0 / x16    31.5 GBps
PCIe 5.0 / x16

Firewire 400/800
   63 GBps

400/800 Mbps
USB 1.0    12 Mbps
USB 2.0    480 Mbps
USB 3.0    4.8 Gbps
USB 3.1    10 Gbps​
Gigabit Ethernet    1 Gbps
IDE (ATA 100)    800 MBps
IDE (ATA 133)    1064 MBps
SATA    1.5 Gbps
SATA III    3 Gbps
SATA 6    6 Gbps

https://cotscomputers.com/blog/pcie-lanes/

[ethnicmail]

This chart provides a detailed comparison of the relative performance of different CPUs. Excellent assistance for my needs.