would i benefit from adding a gigabit pci ethernet card?

Discussion in 'OT Technology' started by dorkultra, Mar 20, 2007.

  1. dorkultra

    dorkultra OT's resident crohns dude OT Supporter

    Joined:
    Oct 14, 2005
    Messages:
    22,754
    Likes Received:
    29
    Location:
    yinzer / nilbog, trollhio
    i have 2 computers that only have pci slots (no pci express)

    right now they have 10/100 ethernet cards in them. if i upgrade to a gigabit switch and 2 10/100/100 cards, will i notice a decent speed boost?

    i'm not sure on what wire i'm running, i think it's cat5
     
  2. P07r0457

    P07r0457 New Member

    Joined:
    Sep 20, 2004
    Messages:
    28,491
    Likes Received:
    0
    Location:
    Southern Oregon
    cat5 does not support gigabit. Secondly, if you're using them for inet access, then you will notice no boost, even with cat6 wiring.
     
  3. dorkultra

    dorkultra OT's resident crohns dude OT Supporter

    Joined:
    Oct 14, 2005
    Messages:
    22,754
    Likes Received:
    29
    Location:
    yinzer / nilbog, trollhio
    looking for fast file transfer between the two, don't care about internet speeds
     
  4. P07r0457

    P07r0457 New Member

    Joined:
    Sep 20, 2004
    Messages:
    28,491
    Likes Received:
    0
    Location:
    Southern Oregon
    you need to upgrade the wiring if it's only cat5. cat5e technically works but cat6 is highly recommended.
     
  5. SLED

    SLED build an idiot proof device and someone else will

    Joined:
    Sep 20, 2001
    Messages:
    28,118
    Likes Received:
    0
    Location:
    AZ, like a bauce!
    gigabit would def increase your transfer speed, but like jolly said, get the wiring right
     
  6. dorkultra

    dorkultra OT's resident crohns dude OT Supporter

    Joined:
    Oct 14, 2005
    Messages:
    22,754
    Likes Received:
    29
    Location:
    yinzer / nilbog, trollhio
    ok, lets assume i get cat 6 wiring, a gigabit switch and 2 pci gigabit nics

    what speed increase would i notice (if any) compared to 10/100 nics running over cat5 with a 10/100 switch?

    i thought the pci bus was limited to 133mbps? or am i getting megabits and megabytes confused?
     
  7. P07r0457

    P07r0457 New Member

    Joined:
    Sep 20, 2004
    Messages:
    28,491
    Likes Received:
    0
    Location:
    Southern Oregon
    well, figure 80% efficiency at 100Mbps = 80Mbps.
    assuming your system is capable of keeping up (not a bottleneck such as cpu, memory, hdd, etc) then you could expect a 10x increase in throughput.

    However, real-world depends on what you're transfering and if the systems can sustain the transfer. For example, larger files benefit more than smaller files.
     
  8. AO

    AO New Member

    Joined:
    Mar 16, 2005
    Messages:
    4,750
    Likes Received:
    0
    Location:
    wyd
    PCI = 33MHZ, 133 MB/s (Mega Bytes).
    1gigabit = 1,000,000/8 = 125 Mega Bytes (125,000 Bytes)

    BUT... http://www.extremetech.com/article2/0,1697,1151593,00.asp

    In other words, even while the PCI bus can transfer that rate, the plain fact is that the data read off the disks is limited to about 50 MB/s. This is the reason not to believe that an external HD enclosure with a USB2.0 (500 MB/s) or Firewire (480MB/s) can ever go any faster than 50MB/s, which is usually the maximum sustainable burst speed. No, I don't know if a Raid-5 can do >200 MB/s.

    BUT...

    ethernet 100 Mb/s = 12.5 MB/s, so switching over to gigabit should allow you to 4x your throughput, which is the very fastest that your disks can transfer data due to mechanical limitations.
     
  9. dorkultra

    dorkultra OT's resident crohns dude OT Supporter

    Joined:
    Oct 14, 2005
    Messages:
    22,754
    Likes Received:
    29
    Location:
    yinzer / nilbog, trollhio
    fantastic, thanks
     
  10. Doc Brown

    Doc Brown Don't make me make you my hobby

    Joined:
    Mar 31, 2006
    Messages:
    16,404
    Likes Received:
    0
    Location:
    Ohio
  11. Supergeek

    Supergeek New Member

    Joined:
    Jan 23, 2007
    Messages:
    1,855
    Likes Received:
    0
    Location:
    Colorado
    I run a gigabit LAN at home, and the speed increase over 100mbit when copying files was very noticeable after I upgraded.

    I need to replace my cables, though; I think I'm using a mix of cat5, cat5e, and cat6.
     
  12. s2k

    s2k OT Supporter

    Joined:
    Oct 8, 2002
    Messages:
    46,930
    Likes Received:
    18
    Location:
    corn field, iowa
    my files transfer between my laptop and the nsa storage on the network (usb hdd connected to linksys nslu2) is only ~2MB/s

    is this because my laptop is on a wireless g connection?
     
    Last edited: Mar 21, 2007
  13. P07r0457

    P07r0457 New Member

    Joined:
    Sep 20, 2004
    Messages:
    28,491
    Likes Received:
    0
    Location:
    Southern Oregon
    lol, yea, wireless isn't so hot for sustained transfers.
     

Share This Page