How can i know the RAM speed of my laptop?
it's an Asus K40IN-VX128
How do I make sure if the frequency is 667MHz or 800MHz, I was thinking of an upgrade.
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Use CPU-Z, assuming you're on Windows.
A list of RAM benchmarking tools is available at http://www.benchmarkhq.ru/english.html?/be_memory.html There are a lot of freeware tools there.
one of the easiest places ive found to get this information is
www.crucial.com/uk you can select by manufacturer / make / model etc. failing that they have a downloadable tool that will scan the PC and work it out for you.
all nice and easy. they will even recommend the best sets of ram to upgrade to and how much they can provide it for.
sorry sounds like a bit of a plug for them but hey ho there a good company that get it right!
Try with SIW - System Information for Windows.
Maybe this one will work. (I'm still quite surprised CPU-Z didn't show memory information)
If you're planning on adding hardware to a machine, then it sounds like you shouldn't be afraid of a screwdriver.
Open up the flap on the bottom of the laptop and have a look at what RAM is already in there.
1) it will almost certainly have a sticker on it telling you what speed/size is currently installed.
2) It should be obvious if you have a spare ram socket (to upgrade) or whether you will have to remove what is already there and replace it with something larger.
Hope this helps.
If you need yet another free tool, I recommend Speccy, a powerful and appealing tool that shows information on your RAM and much more.
Some Linux Live CDs like
KNOPPIX offer to boot into memtest, which shows you RAM type, MHz and more. You can also download ISOs from http://memtest.org/