Windows 10 PC capping upload speed to 5Mbps

robj20 · 26 Jun 2020 at 16:35

Just got a new pc running and it's limiting my upload speed to 5Mbps, my phone will easily get 30Mbps.
Download speed is unaffected, any ideas what to check?

Latest Lan drivers are installed.

robj20 · 27 Jun 2020 at 07:54

Really need some help with this cant find anything online to help.

Meddling-Monk · 27 Jun 2020 at 08:57

From what you've said so far, first thoughts would be:

How are you connected? WiFi or via Cable?
If via Cable, is it through Powerline or Ethernet all the way to the Modem/Router?
If via Ethernet, have you tried swapping the cable for another one?

MrRockliffe · 27 Jun 2020 at 09:18

Which NIC is it? Killer, Intel?

If the former, you may have software throttling it

robj20 · 27 Jun 2020 at 09:18

Cable direct to a switch, 1Gb.

I got full speed on the previous pc using the same cable only a week ago.

MrRockliffe said:
Which NIC is it? Killer, Intel?
If the former, you may have software throttling it

It's a Realtek® RTL8125B 2.5G LAN

Meddling-Monk · 27 Jun 2020 at 13:56

Is the NIC an onboard one or from a PCIe connection? (ie an actual PCIe card?)

robj20 · 27 Jun 2020 at 14:03

Meddling-Monk said:
Is the NIC an onboard one or from a PCIe connection? (ie an actual PCIe card?)

Onboard

Meddling-Monk · 27 Jun 2020 at 14:35

Do you have a second NIC on that board?
And do you have another local machine? If so, can you set them up to try and transfer from your new machine to the other one? And vice versa? See if it's limited to the 2.5 NIC. Help narrow it down to see if it's affecting both, or just one.
If only one, what are you connecting to? (Modem/Router in case it can't support it)
And what is the cable in use? 5e? 6? 6a? (Just eliminating all things to not look at and suggest)

robj20 · 27 Jun 2020 at 14:37

Question i have the latest MSI version of the nic driver 10.038, but Realtek have a 10.039 is it safe to use that instead?

Meddling-Monk said:
Do you have a second NIC on that board?
And do you have another local machine? If so, can you set them up to try and transfer from your new machine to the other one? And vice versa? See if it's limited to the 2.5 NIC. Help narrow it down to see if it's affecting both, or just one.
If only one, what are you connecting to? (Modem/Router in case it can't support it)
And what is the cable in use? 5e? 6? 6a? (Just eliminating all things to not look at and suggest)

No second NIC, im saving files to my NAS at full speed 100+Mbps.

Something i have just noticed, in task manager under network, my computer is constantly uploading something at 5Mbps, how do i find out which program is doing it?

Meddling-Monk · 27 Jun 2020 at 14:42

Can't imagine why it shouldn't work and be safe to use. Even if it was incompatible for any reason, so long as you have a local copy of the current driver on hand, it should be a fairly simple matter to restore it or return it to the old one in Windows. If really concerned, make a snapshot to recover to so things are easier to restore to.

robj20 · 27 Jun 2020 at 14:55

Well i have cracked it.

Noticed on my Task Manager graph somthing was permantantly sending 5Mbps. So looked on the Process/Network list and something called cFosSpeed was at the top.
Turns out MSI Dragon Centre had some network lan manager set to on, set it to off and i get my full 32Mbps.

Thanks for the help though always good to have people putting the effort in.

robj20 · 27 Jun 2020 at 15:02

Without MSI Dragon Interfering.

PING ms
13
DOWNLOAD Mbps
142.86
UPLOAD Mbps
30.59

With

PING ms
13
DOWNLOAD Mbps
142.55
UPLOAD Mbps
5.15

Im not sure why it would do it though, whats the point?

Meddling-Monk · 27 Jun 2020 at 15:04

Glad it's sorted.

Didn't know what board you were using so didn't suggest checking the Dragon Centre software. But good to know to keep an eye out on it in future in similar cases.