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[bs23n1b]

I have searched through the forum and eventhough there is a lot of talk about this subject there doesn't seem to be an answer. My home network is:

Cox cable-modem-->Dir 825 A1 (1.12NA FW) -->Windows 7 PC with PCIe GiGE NIC
                                                             -->Buffalo Linkstation ProDuo set on 1000Mbps Full Duplex
                                                             -->Netgear GS608 Gigabit Switch-->
                                                                                              1) HP Pavilion Laptop PCIe GigE Nic
                                                                                              2) Playstation 3
                                                                                              3) Samsung LCD TV 100Mbps
                                                                                              4) Pioneer Elite Receiver 100Mbps
                                                                                              5) DirecTV HD DVR 100Mbps

Laptop is only on wired for large file downloads, otherwise it's on wireless. All hard drives are 7200 rpm sata, all cables are cat 6, all drivers and firmware are current, all components are set to auto negotiate full duplex. Every part of this system should provide lightning fast throughput, however:

File transfers max out at 120 Mbps and average closer to 80-90. I have tried pc/laptop/nas transfers to and from. Streaming video to any of the media clients on the network especially HD is guaranteed to stutter. I am not expecting 120 MB/sec on my network, but 60-80 is certainly realistic, and the 12MB/sec DLink is giving me is pathetic considering my setup. Did I miss something or is this unit really that big of a piece of junk? I have tried all the suggestions I could find in here, QOS/AUTO 10-100-1000/etc. etc. etc. to no avail. Any thoughts would be appreciated.

[thatwilsonguy]

I am in the same boat, I just got off the phone with my cable company about my internet connection speed. They obviously asked me to hook my computer directly into the modem to test my connection. I assumed that it would be a little bit faster but I felt that my router and network were set up well enough not cause the pathetic connection speeds I was getting. I went from 5mbps to 30 when hooked directly to my modem. My Closest PC that is connected via Wireless N is only 12 feet from the router and it maxes out 5mbps.

Apparently I fell hook line and sinker for D-Links new products ( I also bought a DAP 1522 for my gaming consoles.)

[Leathal]

Dlink, Linksys, Negear, anyone else who makes a cable/dsl router with gigabit LAN ports isn't going to give you a top notch switch you have to pay REAL money for that. I would suggest to be honest that you use the router as a router and you buy yourself a REAL 10/100/1000Mbit "MANAGED" switch that has a decent forwarding rate; 32Gbps or more so you can push your data along without it bottle necking.

I would be surprised if there is any kind of forwarding rate inside the cable/dsl gigabit router/switches certainly if there was it would be very low that your switch wouldn't be able to keep up when moving large amounts of data around.

Andrew

[HTLuver]

I'm also in the same boat.  Standard stuff here: DIR-825 with a USB Drive attached.  I'm getting ~15-20Mb/s through the wireless N network which causes jitter.  Even when i connect to the router directly from the computer the speed is only 35Mb/s!  There is something seriously wrong with this unit. 

Has anyone recorded a hard line transfer rate from something attached to the usb?

[Hellbore]

I'm also in the same boat.  Standard stuff here: DIR-825 with a USB Drive attached.  I'm getting ~15-20Mb/s through the wireless N network which causes jitter.  Even when i connect to the router directly from the computer the speed is only 35Mb/s!  There is something seriously wrong with this unit. 

Has anyone recorded a hard line transfer rate from something attached to the usb?

Is your unit also a rev. A1 like the OP's?  Or is yours hardware rev B1?

I'm just curious if the B1's have these issues too.

[HTLuver]

B1 2.02A or whatever the latest firmware is.

[matrix849]

Under Advanced go to Advanced network and change WAN port speed to 100Mbps.

I had the same problem until i changed that value.

http://forums.dlink.com/index.php?topic=9140.0

[HTLuver]

Matrix849: Thx but i've already performed that one.  I think my problem is more specific to the USB functionality of the router.  For some odd reason the thruput of the connection from USB device-Router-computer is not what it should be even when the computer is connected directly to the router.  I believe the router is doing something to the information internally causing the thruput to be between 20-35Mb/s.  This should be considerably higher than that.  As far as my wireless transfer rate.... i currently don't have a NAS and I only have one computer so i'm not sure how to test it.

[HTLuver]

Well i've verified the USB funtion can't sustain enough throughput for HD streaming.  But I finally got a spare computer from work to test the wireless connection between the router and two computers (one wired and one wirelss).  After alot of tinkering I was finally able to get a sustained 70Mb/s transfer speed with a peak of 80.  In one review the DIR-825 was getting ~80Mb/s throughput.  But in other reviews and a few members on this forum they say up to 110Mb/s   How are they achieving another 30-40 Mb/s.  Could it be my adaptor versus theirs?  I have security off with MAC filtering on.  Guess i'll just be happy i can achieve ~70Mb/s.  As a side note i was able to achieve 250-350Mb/s wired between computers.

[user11]

Well i've verified the USB funtion can't sustain enough throughput for HD streaming.  But I finally got a spare computer from work to test the wireless connection between the router and two computers (one wired and one wirelss).  After alot of tinkering I was finally able to get a sustained 70Mb/s transfer speed with a peak of 80.  In one review the DIR-825 was getting ~80Mb/s throughput.  But in other reviews and a few members on this forum they say up to 110Mb/s  How are they achieving another 30-40 Mb/s.  Could it be my adaptor versus theirs?  I have security off with MAC filtering on.  Guess i'll just be happy i can achieve ~70Mb/s.  As a side note i was able to achieve 250-350Mb/s wired between computers.

The 825 is an 2Tx, 2Rx or dual stream mimo wireless router, a wireless N client must also be at least an 2Tx, 2Rx in order to achieve maximum throughput of the router over wireless, don't forget channel width as well. The 20MHz channel will have a throughput ceiling as well the 40MHz will double that figure. Try reading http://www.wirevolution.com/2007/09/07/how-does-80211n-get-to-600mbps about wireless N, maybe others with higher results had better matched clients, or were using 40MHz channel width?
For the usb sluggishness, it isn't gonna get any better..try reading http://www.smallnetbuilder.com/wireless/wireless-reviews/30588-d-link-dir-825-xtreme-n-dual-band-gigabit-router-second-times-the-charm?start=1 looking near bottom of page for Figure 7 and what it has to say about the usb server performance on the 825.

[Hellbore]

Well i've verified the USB funtion can't sustain enough throughput for HD streaming.  But I finally got a spare computer from work to test the wireless connection between the router and two computers (one wired and one wirelss).  After alot of tinkering I was finally able to get a sustained 70Mb/s transfer speed with a peak of 80.  In one review the DIR-825 was getting ~80Mb/s throughput.  But in other reviews and a few members on this forum they say up to 110Mb/s   How are they achieving another 30-40 Mb/s.  Could it be my adaptor versus theirs?  I have security off with MAC filtering on.  Guess i'll just be happy i can achieve ~70Mb/s.  As a side note i was able to achieve 250-350Mb/s wired between computers.

Did you try doing this test with a wire instead of wirelessly?  That would tell you whether the USB is the limiting factor or the wireless.

[HTLuver]

User11 - Thanks for the info.  I have tried all combinations i believe.  My wireless adapter is the Atheros AR5009.  I can't seem to find any info on it in regards to the dual stream.  I'm assuming it's not or I would be seeing higher throughput.

Hellbore - That's exactly how i verified the USB function can't sustain HD streaming.  Looks like my NAS days are coming sooner than i thought.