One computer download speed is slow.

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One computer download speed is slow.

Postposted on Tue Jul 22, 2014 7:31 pm

I recently moved and at my new house I had the opportunity to change my ISP from cable to fiber. I opted for the 15Mbs down and 3Mbs up service plan. Overall I've been impressed with the consistent speed responsiveness. However on my HTCP the speeds seem to be capped at 5Mbs down. My hardware configuration is as follows:

Motherboard-MSI FM2-A75IA-E53
Processor-AMD A8-5500
Memory-Corsair Vengence 8GB(2x4) 1600MHZ
Power Supply-Corsair CM
Case-Corsair Obsidian 250D
OS Drive-An old 5400rpm 250GB Seagate from a salvaged netbook.

For three days now I've been constantly running speedtest.net and the download speed is always in the 5Mbs range. I've tried both wired and wireless connections, two different routers, and directly plugged in to the modem. The result has been the same. I've updated the bios and all drivers. Yesterday out of desperation I did a complete fresh re-installation of Windows 7 Professional x64. The results have been the same every single time.
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Re: One computer download speed is slow.

Postposted on Tue Jul 22, 2014 7:35 pm

What sort of throughput do you get on that hard-drive? Does it change if you set a network drive as your download target?
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Re: One computer download speed is slow.

Postposted on Tue Jul 22, 2014 7:52 pm

I hadn't occurred to me that the hard-drive could be the problem. How do you suggest I test the throughput? I am not familiar with what you mean by "set a network drive as a download target."
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Re: One computer download speed is slow.

Postposted on Tue Jul 22, 2014 8:58 pm

I thought speedtest.net dumped the data in to the bit bucket rather than writing it to the harddrive, but given a full OS reinstall has the same result I suppose it is possible it goes to the harddrive. I would have said that there was QoS setup on it until you said you had done the OS reinstall.

Try a Linux Live CD like the one from Ubuntu, that will eliminate other hardware as a source of problems.

I do wonder if there is some other hardware hogging the bus internally and slowing down all bus transfers including network data.
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Re: One computer download speed is slow.

Postposted on Tue Jul 22, 2014 10:07 pm

Those speed tests should use active RAM rather than the hard drive, but either way, unless the drive is from the early 90's it shouldn't have any trouble breaking 5mbit. That's assuming it's not failing, or under heavy load from another program.

It's gotta be some sort of software or driver capping your speeds. Maybe even a bizarre setting for the LAN chip in the BIOS.




Edit: In your BIOS, under Advanced\Integrated Peripherals try the following:
  • Enabled - Onboard LAN Controller
  • DISABLED - LAN Option ROM
  • DISABLED - Network Stack
  • DISABLED - Ipv4 PXE Support
  • DISABLED - Ipv6 PXE Support
  • DISABLED - WiFi Controller (unless you're using it)
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Re: One computer download speed is slow.

Postposted on Tue Jul 22, 2014 10:59 pm

That is a weird problem. Have you tried different browsers? Have you tried an HTML5 based speedtester instead of the javascript one? Does the motherboard have any advanced power saving options turned on?
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Re: One computer download speed is slow.

Postposted on Wed Jul 23, 2014 12:01 am

What sort of transfer rate do you get if you copy a large file from another PC on your LAN?
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Re: One computer download speed is slow.

Postposted on Wed Jul 23, 2014 10:12 am

You could try DSL reports.com.
I recall using there tools for optimizing my wired lan connection TCP doctor I think. Sorry it has been a long time , but i do remember it helped.
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Re: One computer download speed is slow.

Postposted on Wed Jul 23, 2014 12:35 pm

vargis14 wrote:You could try DSL reports.com.
I recall using there tools for optimizing my wired lan connection TCP doctor I think. Sorry it has been a long time , but i do remember it helped.

That was on old versions of Windows that didn't understand high bandwidth delay product connections. I wouldn't go futzing with TCP parameters these days, the OS should handle the WAN link speeds fine.
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Re: One computer download speed is slow.

Postposted on Wed Jul 23, 2014 1:33 pm

Odd that it happens both wired and wireless. Very, very odd...

There is no chance of bandwidth management/QOS being enabled on the router is there?

Unplug everything else from the network (including the access point) and try again with the wired connection.

Try a different switch port.

As suggested previously, transfer a file to it over the LAN from another PC and see what throughput you get.

Log into your router's web interface and look at the realtime bandwidth usage on the WAN port while you're running the test. If your router doesn't have that feature, get one that does.

Check the bandwidth usage with all devices connected but idle. Check the bandwidth usage with only the HTPC connected but idle.

It should not be too difficult to isolate the issue.
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Re: One computer download speed is slow.

Postposted on Wed Jul 23, 2014 2:59 pm

Go to this site from the problem PC, and post your results: http://www.speedguide.net/analyzer.php

If the MTU, MSS, and/or RWIN values are badly misconfigured, you could see significant slowdowns.

Also, it might be worth testing to see if you have significant packet loss. As a very basic test, from the command-line, run:
Code: Select all
ping -n 100 www.google.com

If you see anything more than 0% loss, you may have a problem with packets getting dropped somewhere in your network.
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Re: One computer download speed is slow.

Postposted on Wed Jul 23, 2014 7:13 pm

Eh, since it only happens on one PC you can probably rule out all that. Don't think he would have a reduced MTU on just a single PC after a reformat.

Checking for packet loss wouldn't hurt, but even if you find dropped packets it wouldn't help you isolate the problem.
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Re: One computer download speed is slow.

Postposted on Thu Jul 24, 2014 9:20 pm

I really appreciate everyone's suggestions regarding my issues. I'm still busy moving but I will continue to try all suggestions as I find the free time.

I did a file transfer from a USB 3.0 thumb drive to my desktop and I reach a rate as high as 99MB/s. Then tried moving a file from a network folder to my desktop and it transferred a steady 699kB/s.

I failed to mention earlier, my router is an Asus RT-N66U. I check the QOS and even did a factory reset before I tried other routers and plugging directly into my modem. I will check the bandwith usage when I get home tonight along with all the other suggestions I have not addressed as of yet.
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Re: One computer download speed is slow.

Postposted on Thu Jul 24, 2014 9:24 pm

C10 250 wrote: I tried moving a file from a network folder to my desktop and it transferred a steady 699kB/s.
That's pokey. I routinely get 90+ MB/s across a gigabit network.
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Re: One computer download speed is slow.

Postposted on Thu Jul 24, 2014 9:57 pm

homerdog wrote:Odd that it happens both wired and wireless. Very, very odd...

With his particular motherboard, both the wired and wireless are onboard. That's why I suspect it may be one of the BIOS settings above. I would probably also update to the latest revision.
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Re: One computer download speed is slow.

Postposted on Thu Jul 24, 2014 10:41 pm

I wonder if it would be worth spending $15 on a possible fix without first isolating the problem?
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Re: One computer download speed is slow.

Postposted on Fri Jul 25, 2014 7:42 am

I wouldn't mess around with wireless when wired is available, an Intel Gigabit card is only about twice that USB wifi cost.

Given that both the wired and wireless connections show the same slowdown, I also don't think plugging a new interface in is going to solve it. There's something somewhere higher up the network stack on that machine, or something somewhere else in the network that is causing the slowdown.
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Re: One computer download speed is slow.

Postposted on Fri Jul 25, 2014 8:00 am

While I agree that this sounds like a general problem with the network stack, it is also possible that the slowdowns on the wireless and wired connections are just a coincidence and that there are two different, unreleated problems. A faulty Ethernet jack or cable could be causing the wired connection to run slow. On the wireless, a weak or noisy WiFi signal could be to blame.
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Re: One computer download speed is slow.

Postposted on Fri Jul 25, 2014 8:27 am

OP says both are limited to the same 5Mb/s speed though, highly unlikely that both faults would coincidentally end up at the same speed.
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Re: One computer download speed is slow.

Postposted on Fri Jul 25, 2014 10:00 am

Is jumbo frames turned on? if so turn it off. (don't bother trying to turn it on it requires specific support from the router)

Any power save features turned on? Turn those off as well.

Any packet processing features (offloading) features turned on or off? Try switching it on or off and retest.

Don't both bother with the DRTCP or other programs like it unless you are using winxp. Vista and later set the mtu etc automatically.

Are you seeing any packet loss when ping either the HTPC machine from another machine or pinging from the htpc to another machine or even to from the router?

Have you tried an alternative nic?

Nic drivers up to date?

And finally... Have you tried a new cable? And I mean a KNOWN GOOD cable straight from the nic to the router? Gig-e uses all 4 pairs unlike 10/100 which only uses 2. (IIRC) You might have a break in the cable, or someone bent or folded it etc.

Have you confirmed you are connecting at gigabit speeds bi-directional rather than 10mbps non-duplex? (In some cases 10mbps non-duplex can appear to slow down to 1/2 speed if the link is saturated with data going back and forth.)
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Re: One computer download speed is slow.

Postposted on Fri Jul 25, 2014 8:50 pm

I systematically have tried everyone's suggestions with no success. Today I decided to bring the computer with me to work in order to rule out the only other variable I could think of, my internet service provider. My initial testing yielded the same results. My wireless router is in the same room that I was working so I initially did not connect the external antenna. After my first couple of speed tests, I attempted to connect the antenna and it didn't feel right. I looked inside the jack and notice the post in the center was pushed in. I was able to pull the whole jack out and I'm pretty sure that it was shorting. I pulled the slack of the wire out and separated all metal parts from each other. A strange thing happened after that.

I disabled the wireless adapter in windows network settings and connected the Ethernet port. I ran a speed test... 8Mb/s! That's the fastest I've seen all week. I clicked "Test Again" and I the speed hit 10.5 Mb/s. The next three tests ended at 11, 12, then 15.60 Mb/s-the cable ISP at my work is rated at 16Mb/s.

After that I tried the wireless over and over and it never broke 4Mb/s. I tried a USB 802.11g adapter and it came in around the same 5Mb/s.

I don't know what the answer to it all was, or even if it's possible for a shorted wifi antenna to effect all network activity like that, even when the the wifi was disabled by windows or bios. What do you all think?
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Re: One computer download speed is slow.

Postposted on Fri Jul 25, 2014 9:10 pm

Doesn't make sense to me either.
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Re: One computer download speed is slow.

Postposted on Sat Jul 26, 2014 11:05 am

Now that you mention it I am a idiot!
I have one of my HTPC's that is wired and has a wireless card at the same time over 75% of the time would use the wireless connection over the wired connection, why I do not know. But once I disabled or removed with wireless, speeds topped out like they should.

Sorry I should have remembered that.
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Re: One computer download speed is slow.

Postposted on Sat Jul 26, 2014 11:12 am

Oh, duh... you're right! I bet it has been using the wireless all along. Disable the POS integrated wireless when you want to go wired, and if you need the wireless I guess you need to get a discrete wireless card or USB dongle.
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