"Gigabit" LAN

Hi all,

I'm having trouble understanding why I my transfer speed from my desktop to NAS is anywhere from 5-10MB/sec when I have a "gigabit" network. I just replaced my 10/100 nic with a 10/100/1000, and the transfer rate is still the same. I'm frustrated.

This is my setup:
-Internet connection to
-D-Link DIR-655 Xtreme N™ Gigabit Router to
-D-Link DGS-2208 8-Port 10/100/1000 Desktop Switch to
-D-Link DGS2205 5-Port 10/100/1000 Desktop Switch AND D-Link DNS-323-1TB 1TB ShareCenter 2-Bay NAS, SATA, in RAID 1 with (2) Seagate Barracuda 7200 1.5 TB 7200RPM SATA 3Gb/s 32MB Cache 3.5 Inch Internal Hard Drive ST31500341AS-Bare Drives
-from the 5-Port Switch to my Dell Desktop with newly installed D-Link DGE-530T 10/100/1000 Gigabit Desktop PCI Adapter.

All are connected with cat5e.

I've tried small files under 1MB and large files, like HD movies, and transfer rates with the 10/100 nic was 5-10MB, and with the newly installed gigabit nic, it's the same. This is driving me nuts.

Any suggestions, help, MUCH appreciated.

8 answers Last reply
More about gigabit
  1. i think your bottleneck is probably the source or destination hard drive/nas.. even most sold state drives cannot max out 1Gbps ethernet connection.. also maybe you have a slow cpu and limited ram?
  2. Hmmm... that is what I was thinking before I installed the Gigabit nic. My Desktop is a Dell Intel Core 2 Duo 6420 2.13GHz with 4GB RAM running Vista 32-bit. What do you think? Could this be the reason?

    I just purchased HP Pavilion p6710f Desktop: AMD Athlon II 640 Quad-Core CPU (3.0GHz), 4GB DDR3, 1TB HDD, DVDRW, WiFi, Win 7, because I thought my old Dell was the problem. I figured why not upgrade the Dell to Gigabit since it'd be a secondary PC, but since installing the new nic, no difference in speed.

    If the PC is the bottleneck, I'll return the nic. BTW, I haven't opened the HP yet in the hopes that my Dell would be able to transfer files much faster than 5-10MB/sec.

    Thanks for any input.
  3. when i said old pc i was thinking maybe an original P4 with 512MB ram or something like that.. the dell isnt a bad pc but the hard drive itself still might be slowing you down some.. you might see a minor increase with the new HP if any.

    think of ethernet like a highway
    10/100/1000 is just more lanes to hold traffic.. but your car can still only go so fast
  4. D-Link DNS-323? I'm not sure what you're expecting, but the DNS-323 and DNS-321 NAS are low-end, budget devices that probably max out around 10-12MB/sec. Since your typical 100mbps network is never 100% efficient, you might reasonably expect 80-85mbps actual. Move to Gigabit, and the only thing it does is give you access to that last ~20mbps. After that, the NAS becomes the problem, it just can't process data any faster.

    So if you want better performance, you need a better NAS.
  5. Got it, I read another thread on the DNS-323... slow. Oh well... even though D-link says it has GB speed... haha. OK, well thanks all for your input.
  6. I get 964mbit on my 1000mbit network, 1.5gbit if I do upload while downloading.

    A "chain" analogy is perfect for networks. You're only as fast as your weakest link.
  7. Which NAS do you use?
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