Wifi AND Ethernet both have equally slow internet speeds with Windows 8

Both my wifi and ethernet connections are suffering from internet transfer speed issues. Speed tests and downloads both show about 1.5mb down. I should be getting around 8mbps. Upload speed and ping are fine.

This is on a new-to-me Samsung NP355 laptop with fresh installation of windows 8. No antivirus. I checked task manager to see if any processes are using bandwidth in the background. Nothing is.

I have cleared DNS cache and temp files, reinstalled windows drivers for LAN and Wireless adapter, tried manufacturer supplied drivers, and even tried older archived drivers for both wireless and LAN adapters. I have power cycled the modem/router unit.

My other laptops (windows 7) are seeing proper 8mb speeds. I contacted att to see if there was some incompatibility with windows 8 and my modem. They were not terribly helpful.

I also added the registry key to disable the 20% bandwidth reserve limiter that is default on windows 8. Nothing I have done has changed the speeds significantly, so I have run out of options I can think of. What else could be the issue? Laptop specs are as follows:

Samsung NP355v5c
Windows 8 Home
1.9mhz AMD A8 CPU
Atheros AR9485 wireless adapter
Realtek PCI Network Controller

Thanks in advance for any advice you might have!


UPDATE: In safe mode with networking, I can only use ethernet (no wifi), but speeds are up to 8mbps as they should be. Upon restart to normal mode, speeds are back down to ~2mbps. The router and modem are one unit so I can't really isolate them, but ATT did offer to replace the unit. It operates my two other laptops, smartphones, and xbox 360 without a hitch, so what could cause one laptop perform differently?

SOLUTION: AMD Catalyst manager's streaming feature was the problem. After disabling that aspect of the software install, the internet speeds went back to normal.
7 answers Last reply
More about wifi ethernet equally slow internet speeds windows
  1. probably NOT the computer. If you have a modem and router, powercycle both. if no change, BYPASS the router. if STILL no change, contact internet provider.
  2. UPDATE: In safe mode with networking, I can only use ethernet (no wifi), but speeds are up to 8mbps as they should be. Upon restart to normal mode, speeds are back down to ~2mbps. The router and modem are one unit so I can't really isolate them, but ATT did offer to replace the unit. It operates my two other laptops, smartphones, and xbox 360 without a hitch, so what could cause one laptop perform differently?
  3. I don't know right off, but might be some flaw with Windows 8. It causes numerous problems in places Windows 7 did not cause before. Try a general search for "Windows 8 slow internet" or "Windows 8 internet speed" will probably help you find out.

    Could also be slower driver speed causing the problem, or background junk from Windows. If the problem can't be found you should go back to the far more stable and better functioning Windows 7.

    P.S. for future posts, you need to be careful with your abbreviation. For example you have "mbps" which I'm guessing would correctly be something like "micro bit per second". The metric system is case sensitive, and the "M" should always be capitalized to mean "Mega". The "b" also lower cased means "bit", capitalized it means "Byte" which is a unit of measurement eight times larger. Finally your CPU you listed at 1.9 "mhz". Again, the "M" should be capitalized, but this measurement also means "Megahertz", when it should be "Ghz" for "Gigahertz" which is a unit of measurement one thousand twenty four times larger.
  4. cra1 said:
    UPDATE: In safe mode with networking, I can only use ethernet (no wifi), but speeds are up to 8mbps as they should be. Upon restart to normal mode, speeds are back down to ~2mbps. The router and modem are one unit so I can't really isolate them, but ATT did offer to replace the unit. It operates my two other laptops, smartphones, and xbox 360 without a hitch, so what could cause one laptop perform differently?


    Windows 8, drivers, or background programs. Some things in all of these don't load in safe mode.
  5. I have searched for as much info I can find. But thanks for the suggestions, and heads up on abbreviations. I just got lazy I suppose. The only random thing I have come across, is someone who said their graphics manager program was throttling data, so i'm going to uninstall ATI catalyst and post back.
  6. The ATI Catalyst software was the problem. I uninstalled and my internet speeds returned to normal. I reinstalled the ATI drivers without the media optimizers, smooth stream features, ect... and everything is working now. It is strange that there isn't much info in forums about this issue. After days of searching I only ran across one thread with this as the solved issue. I guess i'll send an email to at least make AMD aware of the issue. Thanks for the replys.
  7. How strange, there must be something inside of Windows that is conflicting with the driver. Thats good of you to take the time and report the issue, I'm sure they will get on it as fast as they can.
    Glad you were able to find the answer.

    As for the abbreviation, don't sweat it too much. I wasn't trying to be over bearing or anything with it just in some cases having the wrong abbreviation has caused issues with peoples posts in the past because miss communication. Fortunately it wasn't the case here, but it sucks for if you actually needed someone's help here if you had to spend a day or so just clearing up these details.
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