Classic Mac Hardware (Troubleshooting, Upgrading, & Modifying) > General Hardware Discussions

speed of common technologies

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supernova777:
i believe these are "theoretical top speeds" not real world..

100BASE-T         12.5 mb/s
FW400      50 MB/s
gigabit ethernet   125 MB/s
ISA 8-bit      2.39 MB/s
ISA 16-Bit      8.33 MB/s
EISA 32bit          33.32 MB/s
NuBus 10 MHz   40 MB/s
NuBus90 20 MHz   80 MB/s
32bit CardBus 1   66.66 MB/s   
32bit CardBus 2   133.33 MB/s
PCI 32bit/33MHz   133.33 MB/s  (most short pci cards)
PCI 32bit/66MHz   266.7 MB/s
PCI 64bit/33MHz   266.7 MB/s (most mac pci slots)
AGP 1×           266.7 MB/s
AGP 2×           533.3 MB/s (sawtooth/gigabit)
PCI 64bit/66MHz   533 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
PCIE 1.0 (×8)     2 GB/s
PCIE 2.0 (×4)     2 GB/s
AGP 8x      2.133 GB/s
PCIE 1.0 (×16)    4 GB/s
PCIE 2.0 (×8)     4 GB/s
PCIE 2.0 (×16)    8 GB/s
PCIE 3.0 (×16)    15.75 GB/s

supernova777:
ATA-66 : 66MB/s
ATA-100: 100MB/s
ATA-133: 133MB/s

MacTron:
In my experience real speed are usually 80% of theoretical speed. Usually alongside the "visible data" a lot of other data is transferred (control data ,check data etc

supernova777:

--- Quote from: MacTron on September 25, 2014, 07:10:53 AM ---In my experience real speed are usually 80% of theoretical speed. Usually alongside the "visible data" a lot of other data is transferred (control data ,check data etc

--- End quote ---

^^ agreed.. in my experience.. 60-70%
if you get 80% you are lucky + blessed :)

its also interesting to note the NUBUS superiority over conventional PC technologies of the same time.. ISA
pretty easy to see why pro tools was on mac only;)

i just realized this chart is missing an entry:
PCI 64bit/66MHz   533 MB/s
maybe u can edit this in, because im unable to modify this post

didnt we discuss some g4 xserve having pci64/66mhz slots?

MacTron:

--- Quote from: chrisNova777 on September 25, 2014, 09:14:16 AM ---i just realized this chart is missing an entry:
PCI 64bit/66MHz   533 MB/s
maybe u can edit this in, because im unable to modify this post

--- End quote ---
Ok, it is done.

--- Quote ---didnt we discuss some g4 xserve having pci64/66mhz slots?

--- End quote ---
Yes, it is.

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