Unexplained Decrease in Throughput Not Repairable?

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J

jarblater

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Jan 21, 2013
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I used to be able to download at 7.4MB/s and upload at 4.2MB/s over WIFI (on Ethernet, 10.2 down 7 up). Now, I am downloading at 3.9-ish and uploading at 2.4-ish on both WIFI and Ethernet!

I have all the latest drivers (most are not from Lenovo, and I cannot say I would blame the use of non-OEM drivers), Windows updates and other software updates. All of the Windows internet related services are enabled (IP Helper, WinHTTP autoconfig, DNS, TCP/IP, etc.) And I have been doing Google, Youtube and Forum searches for the past two days. I even downloaded CFosSpeed 9.65.2151. After all this I have only been able to achieve spikes of 5.2 down, and in crease the average download speed by about 0.3 MB/s...

Both my up and down speeds seem to vary much more than they used to (going back and forth between higher and lower reported throughput) which makes me leary of possible hardware damage? But this seems very unlikely to me as I have never dropped my laptop, spilled anything on it, or gone more than a month without dusting the inside. The only thing I overclock is the GPU which stays below 78C without a cooling pad (74-ish with one).

So far I have only been able to be confused and angered, so I am asking my buddies on my favorite forum for some help.

Thanks ahead of time for any replies, and thank you for your help.

I am using a Windows 8.1 64 bit Lenovo Y500: Intel Centrino 2230, i7 3630QM, HM76, GT750M 2GB GDDR5, 2x4GB DDR3 @1600MHz, 1TB 5400 RPM + 8GB Cache on 60GB Mushkin Atlas (firmware 507) using ExpressCache 1.3.110
 
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getochkn

getochkn

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Jul 2, 2006
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Sounds like it's related to your ISP, your modem or your router. What are the advertised speeds you pay for?

If they added a new connection to the area, storm damaged some stuff, etc, could be that. Do you have a cell phone or another PC to test speeds on, then test your laptop right after that.

I would have done that first before assuming it was Windows and mucking stuff up.

Other thing you could do, download a Ubuntu live disc and install it to USB and run it and test speeds from Linux instead. That will clearly tell you if it's your Windows, or your internet connection in general.
 
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J

jarblater

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Jan 21, 2013
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I tested the down/up speeds on my desktop as well, and used my laptop on other networks. My desktop was still getting the speeds it always was, and on the other networks my laptop was still showing the same decrease in speed. I pay for 10Mbps from Comcast, and the other two networks I tested it on used the same package.
 
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getochkn

getochkn

Polypheme
Jul 2, 2006
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65,040
Okay, so it sounds like the laptop. That's a start and something you should have mentioned in the OP. I doubt hardware damage as it wouldn't affect the WIFI and ethernet. They are separate chips in the laptop, usually by different companies, etc.

I would try either going into safemode with networking and test there, or try the Ubuntu apporach. This will either rule out, or confirm hardware issues, and thus leave only Windows. Either some virus or malware running, or drivers went flakey, but doubt that since again, it's two different devices that control wifi/ethernet, which leaves something crunchy in the Windows network stack itself.
 
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J

jarblater

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Jan 21, 2013
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OK so I'm in safe mode with networking right now, and I'm actually getting lower down/up speeds, about 3.6 & 1.9

Edit: Via Speedtest.net's reported Mbits divided by 8 to get MBytes.
 
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J

jarblater

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Jan 21, 2013
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Sorry to post to an old thread, but, I think I may have figured what happened to the internal WIFI adapter. I used Throttlestop 5.00 to stop the CPU from throttling from heat. Simply enough, CPU's max operating temperature = 105 C, WIFI adapter's = 80 C and is inconveniently placed directly where it can absorb much of the heat from the CPU. My WIFI adapter was scorched and now needs to be replaced due to irreparable heat damage. All Lenovo Y500/400 and Y510p/410p owners should take this as a warning.
 
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