50% Internet Speed on 1 of 2 similar PC's

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andymcj

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Oct 4, 2017
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Hi I have a an i7 (7th Gen) PC running windows 10 Pro, my wife has an i3 (8th Gen) PC running Windows 10 Pro. We both use the Intel i219-V onboard NIC with the same 23.2 (Latest) Intel driver (12.17.10.7) and our Internet is 400Mb/25Mb. Both PC's are connected via the same CAT5E patch cables to a Cisco Unmanaged 1Gb Switch and both are using Auto for Speed with 1Gb being detected and used. The Cisco switch is connected via a Cat5E patch cable to an Asus wireless Router 1Gb LAN port then this Routers WAN port is connected to the Arris Surfboard SB6190 modem using a 1Gb CAT 5E connection.

The issue is that my wifes PC can access the speedtest.net server and get 430Mb Down and 25Mb up and I get when connecting to the same server 190Mb/22Mb (This test has been run several times with the same results, so timing, load or difference in server is not the issue)? All our network cards options are set exactly the same with Energy Efficient Ethernet turned off.

So both PC's run a 256Gb SSD both by Samsung, so i cannot understand why my connection to the internet is 50% slower or more than my wifes PC with similar/same hardware.

I have tried to reset the TCP Stack by using the NETSH command and flush the log files without success.

This issue is driving me mad and I cannot find the answer to this, I am hoping that you guys may be way more clever than me and put me out of my misery by solving this mystery ;o)

Many thanks...
 
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kanewolf

kanewolf

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I am surprised you get anything on the second PC. The SB6190 is just a modem. Typically a router is REQUIRED because only a single IP address is provided by your ISP. So either you are paying extra for additional IP addresses or are very lucky that your second PC is working at all.

Your PCs are also at significant risk because they have public IP addresses and are not behind a home gateway/firewall.

I strongly recommend you get a router.
 
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androbourne

androbourne

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You do realize nowadays most modems are really modems/routers right? Almost every ISP in USA uses this combo. When you order a new internet service, that's all you get. It provides one WAN IP but then can do LAN routing, normally uses defaults 192.168.1.x schemes... this is not abnormal at all. Also because they are a modem/router combo. They normally come with a default firewall enabled. It's pretty much equal or a little less better then the firewall you would get out of a consumer grade router. Nothing special.

I personally would say get a router because then you fully own it. Not the ISP. Also you can turn on bridged mode on the modem and get full control over your ports and network via your owned router. Which is a way better option then using the default ISP modem/router which you have limited access too.

@andymcj

Speed differences could be caused by many things. NIC driver differences, distance between the modem and the PC (aka your PC being further away from modem then your wifes) etc...

I would suggest the following.

1. Test your ethernet cables and make sure they are not damage. Cables can work even if they have issues but would causes slower transfers.

2. Update your drivers, specifically NIC drivers.

3. Perform a full system scan to ensure no malware or anything is taking up your internet resources on that system. Try running your choice of anti-virus, with ccleaner, adware removal tool and malwarebytes, just to be safe.

4. Download glasswire. It is a free program you can use to monitor your system. You can see what applications accessing the internet and what they are doing. It is possible a program is reaching out and obtaining data while you are running speed test which would result in slower speeds. Even application or game updates can cause this.

Let us know what your results are after trying the above!
 
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andymcj

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Oct 4, 2017
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Sorry I missed out the part that said my ASUS near top of the range Router is what the Cisco Switch is connected to, then the Router connects to the Arris modem via a 1Gb Cat 5E cable via the WAN port.. So I have a Firewall in place as well as NAT.

Sorry for the confusion
 
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kanewolf

kanewolf

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I looked up the model number that was provided. It has a single ethernet port and no mention of WIFI on the Arris page. My experience is that is a modem only. Not a combo unit. I don't have one, so I don't have first hand experience.
 
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androbourne

androbourne

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Gotcha. Well I know for a fact in FL. Those surfboards are modems/routers for clients with under 50mpbs internet speed. When they go above 50mbps. They are upgraded to an Arris or better surfboard with more then one port.

Either way. Point is moot as OP stated he actually does have a router in place as well.
 
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