Lose Internet Connection by adding RAM

Microsoft Windows 7 professional 64-bit
January 8, 2010 at 23:17:16
Specs: N/A
I am having a strange issue of losing internet connectivity by adding a third GB of RAM. I have seen other instances of people with this issue but never a fix. Any one or any two of the three 1GB RAM sticks will work fine, but as soon as a third is installed, internet connectivity is brought to a complete crawl and won't stay connected. Does anyone know why this might be?

Main Board: Asus P5NSLI onboard ethernet
CPU: Core2Duo 6600 2.4GHz
RAM: 1GB DDR2 667 (3pcs)
OS: Win 7 Pro OEM 64bit
Modem: Motorola SurfBoard SB5100

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January 9, 2010 at 06:28:20
If you haven't already done so, the 1st thing I would try is updating the BIOS, especially if your current version is 1602 or older.


Other than that, you have several options, none of them pleasant:

- stick to 2GB RAM
- try a PCI ethernet card...it seems to work in some cases, but not all
- install a 32-bit OS
- get a new motherboard

There are some tips in the following article...scroll down to the comments & start with #7:


And just FYI, running 3 sticks of RAM will knock your system out of dual channel mode. If you wanted 3GB total, it should have been 2 x 1GB + 2 x 512MB rather than 3 x 1GB.

Also, if you're not overclocking the CPU FSB to match the RAM speed, the RAM should be underclocked to match the CPU FSB. Manually configure the RAM settings in the BIOS to run as DDR2-533 (266MHz frequency) & also manually set the memory voltage to the RAM manufacturer's specs...do not rely on AUTO settings.

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January 9, 2010 at 14:55:58
Hi, thanks for the reply, jam. I did go with buying a separate network card and made sure to bring the computer to the store and find a working Win7 x64 compatible card while I had all three RAM sticks installed. I thought about the dual channel thing, but 512MB sticks are probably getting rare for DDR2 nowadays, and with one slot left, I may eventually do 4GB before I get a new PC so I'll leave it empty for now.

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