Qosmio G40 - upgrade memory to 4 GB

Dear all,

I want to upgrade my memory standard 2 GB (2x1GB, 667 Mhz) up to 4 GB. Clearly, I realize that only 3 GB (or something around) will be visible.

* The question is choose what type RAM os and which brands/models best fit (price and performance-wise) *:
(a) PC2-6400 800 Mhz
(b) PC2-5300 667 Mhz

_Would the system use PC2-6400 800 Mhz or could it be underclocked? _
I read this thread (http://forums.computers.toshiba-europe.com/forums/thread.jspa?threadID=28634) and seems that the part of the wire on underclocking has not been addressed.
Does make sence buy PC2-6400 with a hope that with increased Mhz, performance will improve?

There is a list of RAM tested brands/models and confirmed as compatible by Toshiba for purposes of upgrade? _
The manual indicates that only authorized Toshiba RAM should be used, but I failed to find a list of approved... The RAM manufacturers offer different ideas (Kingston suggests PC2-5300, Corsair suggests PC2-6400), but I'd rather hear Tohsiba.

* I would be grateful to hear from those who have done an upgrade if there is no improvement in performance! *

Thank you all,.

I can see in the last 5 days nobody have written anything, and I hope that I can offer just my comment to this. To be clear I have no Qosmio G40 but I hope we can discuss on the upgrade of RAM.
That said Toshiba? Not much.

For each model of laptop, Toshiba offers a list of compatible and tested RAM modules. For your computer model Toshiba laptop offers modules of DDR2 667 MHz RAM. 2 GB module has PA3513U-1M2G part number. I also recommend you to buy Kingston modules. Kingston offers products of high quality.
I don't see any reason why Toshiba should test all the modules available on the market and create a list. If someone will sell own products, they must test it with laptops available on the market and have a good chance to sell own products.

As I wrote before RAM in the manuals is being tested. To be honest I don't see any sense why use module 800 MHz on the motherboard with bus 667 MHz front end, if you can get the 667 MHz modules.
What do you think?

One last thing: to comment on this notebook 800 MHz just processor system Bus Clock speed (PSB) is 800 MHz.

Tags: Toshiba

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