replace/upgrade original memory

[TexasIndian]

annoyed; can't find anywhere on HP.com site to verify  a Crucial.com

replacement product is specific.  My laptop only has 2x2gb memory;

I want to replace with 2x4gb (sadly, 8gb is Max).  I'm overly cautious

and simply want someone HP-authorized  to verify these are correct.

Crucial product #  CT2KIT51264BF160B    *    CT5307352

                                    8gb Kit (4gbx2)  *  DDR3L-1600 SODIMM

[Huffer]

Those are not correct. The Manual contains this information:

2 customer-accessible/upgradeable SODIMM slots DDR3, 1333-MHz Supports dual-channel support Supports up to 8 GB of system RAM in the following configurations ● 8192-MB total system memory (4096-MB × 2, dual-channel)

Your Service manual

4-GB memory module 599092-001

https://www.amazon.com/HP-VH641AT-4-GB-DDR3-PC3-10600/dp/B0030L3B8E/ref=sr_1_2?ie=UTF8&qid=148952607...

The memory you ask about is 1600 mhz and you need 1333; it is 1.35 volt and you need 1.5 volt. 

It might work: DDR3-1600 will sometimes downclock and 1.35 volt will likely also run at 1.5 volt but why chance it? Get the specified memory in the first instance. 

If you will check the memory that is installed I believe it will be DDR3-1333 and 1.5 volt, but only 2 gig modules and you need 4 gig modules. 

If this is "the Answer" please click "Accept as Solution" to help others find it. 

[TexasIndian]

NOW you see why I'm always so cautious....

If I was a member of a geek fraternity rather than the

'old grumpy dumbass' group I'm president of, I'd know

how to attach the 3 photos in my phone to this reply.

But here is the info off the sticker attached toacross the top card: 

MT8JSF25664HZ - 1G4D1 - 1049

2GB  1RX8  PC3-10600S-9-10-B1

Product of China    DPAALWROO6

a smaller UPC sticker 'casually' lying atop cards:

             "Replace with HP SPARE"

                       598856 - 001     

                            7F1134

[Huffer · Accepted solution]

Well reading the label that is indeed a 2 gig module of DDR3-1333 1.5 volt memory. 

If this is "the Answer" please click "Accept as Solution" to help others find it. 

[TexasIndian]

can I now assume if this was YOUR decision, you'd go ahead & buy two of

A-Tech's  HP model VH641AT  4gb modules (#599092-001) on Amazon??

[Huffer]

Yeah or equivalent. That was the best price I could find on amazon.com. Crucial will also have that kind of memory. it's all in knowing thre specs to ask for. What is more convenient for you? Amazon or Crucial? 

[TexasIndian]

well, let's see....Crucial's Product Finder  produced 4 memory choices:

2gb*4gb*2x2gb*2x4gb "specifically compatible to your dv7-4270us"

and NONE of them had the exact same specs you describe as essential.

PLUS, I have ~$200 sitting in my Amazon Prime account (free shipping).

You've been a tremendous resource...hope I won't irritate anyone if any

query I post in future is addressed specifically to you.  Will drop you a

reply here after I receive the cards & hopefully install them successfully.

Thanks again Huffer.