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Which RAM to use?


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#1 jimcatlee

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Posted 22 January 2014 - 02:12 PM

How do I know which RAM stick to use with my laptop? I have a Dell Inspiron 15 N5050. I purchased a Dell ram stick like the one that Dell says works in it, but it doesn't work. My computer guy says it is probably a 10666 and I need a 10600. Since it doesn't say on the sticker, I don't know what it is for sure. However, he said that I can purchase a PNY ram stick like this one

(http://www.tigerdirect.com/applications/searchtools/item-details.asp?EdpNo=780964&SRCCODE=WEBGOOPA&cm_mmc_o=mH4CjC7BBTkwCjCV1-CjCE&gclid=CPztlp3FhrwCFaTm7AodtwoAgg)

and even though it is a 10666, he says PNY is "reverse compatible" and it will work. Does anyone know anything about this?



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#2 dc3

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Posted 22 January 2014 - 02:27 PM

Crucial lists the following RAM as being compatible with your computer.

 

DDR3 PC3-10600, DDR3 PC3-12800, DDR3  PC3-14900


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#3 zingo156

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Posted 22 January 2014 - 02:33 PM

http://www.crucial.com/upgrade/Dell-memory/Inspiron+Laptops%2FNotebooks/Inspiron+15+%28N5050%29-upgrades.html

 

That says it supports DDR3 PC3-10600, DDR3 PC3-12800, DDR3 PC3-14900.


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#4 zingo156

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Posted 22 January 2014 - 02:34 PM

Funny DC3 posted the same before I did!


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#5 dc3

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Posted 22 January 2014 - 02:40 PM

Great minds thinking alike. :thumbup2:


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#6 zingo156

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Posted 22 January 2014 - 02:44 PM

My thought exactly :)


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#7 jimcatlee

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Posted 22 January 2014 - 07:40 PM

Thanks for the info guys. I wrote in down in my notebook. Did either of you look at the RAM at the link I posted? Do either of you know anything about PNY being "backwards compatible"?



#8 zingo156

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Posted 23 January 2014 - 09:20 AM

When you say it doesn't work, I assume it caused a no post situation? It is possible you got a bad stick of ram or that it just isn't compatible. I would try to stick with something in the above posts that say it is compatible.


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#9 dc3

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Posted 23 January 2014 - 10:39 AM

I'm not sure just what your friend is referring to when they state that the module is "backward compatible".  Either the module is compatible or it is not, I don't know of any in between.  The only way that it would be even close to backward compatible would if you installed modules of different speeds, the slower module will underclock to run at the slower module's speed.


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#10 jimcatlee

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Posted 24 January 2014 - 03:42 PM

When I said the RAM doesn't work, I meant that it did not register as being there. Computer did not "recognize" it. After I tried to restart the computer with the new RAM in it, the computer would not power up. I took out the new RAM stick and the battery and let it set for about 30 minutes, plugged it into electric and it powered up again. Scared me and I do not want that to happen again. My local computer guy told me do all that and said it probably happened because the new RAM stick was a 10666 instead of a 10600. Something about the mother board not recognizing it...

He said a PNY RAM stick is "backward compatible" and I could get a 10666 because it would run at the slower speed. He said not all RAM would do this, but PNY and Crucial would. I was hoping that someone here might know something about that 'cause I don't want to spend another $40 on a RAM that would not work and possibly mess up my laptop.



#11 hamluis

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Posted 24 January 2014 - 08:42 PM

FWIW:  It doesn't matter if the RAM module is stated as "10600" or "10666" or "10700"...all the same.  How they are labeled is just an idiosyncracies of whomever wants to post the specs.

 

http://forums.anandtech.com/showthread.php?t=2338329

 

If someone states there there is a difference...they are badly mistaken.

 

Louis



#12 jimcatlee

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Posted 25 January 2014 - 03:04 PM

That's interesting. I guess the RAM stick that wouldn't register as being there and messed with my computer is screwed up. Thank you.



#13 hamluis

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Posted 25 January 2014 - 03:57 PM

:thumbup2:

 

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#14 jimcatlee

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Posted 27 January 2014 - 10:53 PM

So now I have another problem. The Dell recommended RAM says "Memory Speed: 1333 MHz (PC3-10600). The RAM stick I'm looking at says "Type of Memory: PC3-10666 DDR3" and "Speed: 1.3 GHz". I don't understand all that. Can someone please explain?

 

#15 dc3

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Posted 28 January 2014 - 08:05 AM

PC3-10600, PC3-10666, and PC3-10700 all have the same bus speed of 1333MHz and are 204 pin, they are the same.


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