Stephen, I would encourage you to read the G75 ( / G55 ) thread that is a sticky for memory addition:
Adding RAM to G75
http://rog.asus.com/forum/showthread.php?23929-Adding-RAM-to-G75&p=168628&viewfull=1#post168628The G55 is the same as the G75 for memory expansion, so that single thread is enough, but there are other G55 threads that aren't stickies, you just need to do a simple search on
G55vw sodimm
This thread has the right response here:
"The best way to upgrade your RAM is to download CPU-Z and look at the specifications of your existing RAM. Then find some that matches them exactly and you'll be free of problems."
G55vw-RS71 RAM question
http://rog.asus.com/forum/showthread.php?39173-G55vw-RS71-RAM-question&p=329579&viewfull=1#post32957...Even better is to find exactly the same SODIMM, there are plenty of sites online that you can get the same memory at a good price. I use ebay and get laptop pulls, they are already burned in and stable and are cheaper than new.
Adding memory shouldn't be looked at as a mental exercise, it is a simple look, order, and install.
There is no reason to put in so much time into figuring out how to save $5 on some cheaper memory. It doesn't pay off in the end. If you have to "win" then go ahead and play that game, but for me I would rather get the same part the first time and give it no further thought - including after it is installed and you get a random BSOD and have to wonder if the memory you bought 3 months ago is really compatible.
If you want to get faster memory, replace all 4 SODIMM's. I haven't spent time upgrading the G55vw, maybe someone else has found the optimal fastest memory for the G75/G55.
Also, this era of motherboard chipset / CPU uses 1.5v memory.
Here is what the CPU-Z read out looks like for me, and I ordered the same 8GB part from ebay, and installed it with no further thought - except for answering these questions.
Even with an upgrade from 1600mhz to 2133mhz memory in a G750, there wasn't that large of an improvement so as to go through the trouble of replacing all 4 SODIMM's, so I am still running the original memory Asus selected, 4 x 8GB - and I never need to think about it again.
Please post what you have, a nice Windows Snipping Tool screen grab of the CPU-Z SPD page would work, as above. Then do a google search for a new pair to expand your slots completely.
Please post back when you have it running too
🙂