Lenovo G570 model 4334: Ram Compatibility

Question

When i used Crucial's memory finder it says the laptop supports DDR3 1333 (10600) and DDR3 1600 (12800). On the Newegg memory finder it also says that the laptop supports DDR3 1600 (12800). However on the tech specs pdf from Lenovo, it shows that it supports DDR3 1333 (10600). My question is does the Lenovo Essentials G570: 4334 laptop support DDR3 1600 (12800) or are these memory finders invalid?
Memory Finders:
http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=E10F08FEA5CA7304
http://www.newegg.com/MemoryFinder/#_HZBBMV0sw1ABD
G570 Tech Specs pdf:
http://shop.lenovo.com/us/lenovo-g570-2.shtml
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Answer 1

all sandys surport ram no problem.
lenovo might cap the max bandwith but for the most part there are no issues with sandys at all.
some other cpu/chipsets dont like certin process nand.
the newer low volt faster nanosec wont work in some and will in others.
BUT FOR SANDY BRIDGE ITS DIFFERENT!
why? well when the older cpu did not have the memcontroller on core it was on die or on the northbridge and the process of the ram changed alot so you get one speed ram say 1066 but it really two generations apart because the chips used were different.
the older ram used larger less chips and the newer ones used smaller and more of them,thats a quick way to tell.
there also the ram timing but most is selective.
mix and match ram brands on older pc that have dual band mode and they act up.
thats why they sell dual matched sets.
on sandy that not a issue any more as they can run independent of each other.
you can mix timing,brand and even speed and sandy will default it with zero issue.
on older pc well some will default and some will just act act up.
but most of the issues come from really late model different NS speed that they DONT PRINT!
brazos has ram issues and i am certin it that very reason.
so when you buy ram they sale ram is going to be the cheapest they can make and that will be the lowest cost nand and that is the newest nand as they can make more chips that are smaller from one disc.
so add this new ram to a older generation that dont have a bios or chipset surport well then it bad luck to you.
the reason sandy dont have any issues is the fact it brand new in lead with the newest process of nand made and the memeroy controller is a really great design made to except higher then offical surport speed.
older pc might not surport larger size in a certin slot or max amount.
plus the pc maker might limit this as it exceeds there power so a chipset might surport 4x2 but the laptop wont due to the extra draw of current.
dual band most of all.
dual makes the chipsets really work over time so a slight change will be a huge problem for that chipset most of all because there no selection in the bios to run single model two channels.
intel is doing away with dual band however once again sandy bridge run flawless even under low volt even if the bios has no setting for low volt sandy will make it so.
plus most web sites like new egg print SURPORT SANDY BRIDGE.
that means the ram can make use of sandys extra features like voltage change and read,plus higher clocks and you can change them outside the bios.
same speed different numbers.
that whats freaks alot of people out is the 10600 10666 10700 1066 ram.
those are the different brand nand made at different founderys like hynix or samsung or intel or even micron.
slight differences who made them where they made for say ocz brand produce the same speed but slightly different numbers.
these are what causes problems for certin cpu chipset and brands in a notebook and why some ram works and some dont.
lenovo uses samsung.
so most people wanna have zero issues outside of sandy bridge just use that and read what samsung says on there web page about the ns class.
some cheap brands use old leftover nand that if used on a newer pc will cause a problem because that nand was made for a different ram speed and the pc maker did not take that into account.
samsung pulls old nand right away as to not have that kinda issue when you buy there brand but that dont mean samsung nand wont show up in a ocz product.
this is why crucial has a great name.
they dont use old micron nand and have you jump threw hoops.
bottom line is buy a ram brand from a company that make the nand.
even if they dont use there own nand they will use the best i&h chips out there.