Question 1

is it compatible with a Macbook Pro Retina (late 2013, Haswell)?

Accepted Answer

Sorry, I don't really know the answer and it looks like it is difficult to find help on-line with that model... must be too new. 
My best suggestion is to see if you can open it up and look at the existing memory inside.  If you can see it, get the exact same thing, assuming you are just doubling the memory capacity. 
Hope this helps.  Otherwise I always be sure of 3 things:
(1) Same physical number of pins (and size), (2) Same DDR level, whatever that is for you MacBook, and (3) same speed (1600) or (PC3-12800)... look this up either on your specifications or at apple.

More info can be found by going to the apple menu, click (About This Mac, then select "more info" then "System Report" then select "memory" along the left edge.  It will tell you the speed (like 1600 MHz) and the DDR number (like DDR3).

Sorry if I'm telling you what you might already know.
Good memory hunting.

Question 2

I recently bought an HP 15-d037dx TouchSmart Notebook PC, and i'm hoping to double the RAM from it's stock 4GB to 8GB (mainly for gaming purposes). As I have had a hard time finding out if this PC is even expandable (no help from HP's awful customer support), I really just want to know if (1) I can upgrade my laptops memory? and (2) will this specific memory model work for my laptop? Thank you in advance for any help!

Accepted Answer

I have an HP TouchSmart 14z-f000, which should be fairly similar to what you have. It has 2 memory slots, and the memory I purchased from Newegg works perfectly (4GB x 2, total 8GB).
Opening up the laptop is rather tricky, though; you need to unscrew a dozen screws to pull out the back panel, a couple more screws to pull out the keyboard, AND a half dozen screws for panel that holds keyboard. The panels are held together rather tightly, so you need one of those plastic tools that people use to pry open cell phones if you don't want to damage the case. I guess HP doesn't want their "consumer" laptops to be opened by an average Joe, because most of their "business" laptops are quite easy to open. YouTube might have a video instruction.

Question 3

I have a Series 3 15.6" Laptop , I am wondering if this is Compatible with it? As far as I can tell it is.

Accepted Answer

This is something you can determine.  
Compare this new part with the existing one in your laptop.
As long as 
(1) it has the same number of pins (and the little slot in the board is in the same spot),
(2) it matches the speed of your existing memory; for example PC3 12800 
(3) I think it's essentially the same as item (2) but the DDR numbers match, in this case DDR3 1600 match.
That should be good.
If possible, log in to the laptop manufacturer's website and go to "support" tab, find laptops, and enter in your laptop model number.  Find either the User guide or other documentation that tells about what memory your computer can accept, it will help to verify everything will work.
It may also state the maximum amount and types of memory and maybe even if different size memory is ok.  (It may only say you can't mix sizes if that is true, otherwise different sizes should be ok.)
With this information, it should go well.
Best Regards,

Question 4

is this compatible with my dell insprion 15-3521?

Accepted Answer

I think he is asking you to check if the original memory is DDR3L, which runs at 1.35V.
This G.SKILL memory is DDR3, which runs at 1.5V.
Most people (but not all) advise using the same voltage memory.

Question 5

I have a HP G6-2270DX. is this compatible?

Accepted Answer

the short answer is Yes.  SO stands for Small Outline and is the form factor used for all laptops and notebooks.

the pc3-12800 simply refers to the speed of the memory. In any case your specs that came with the notebook and your user manual should give you all the details you need for memory upgrades.

Hope this helps.

Question 6

compatible with dell e5540?

Accepted Answer

Hi, there.  Yeah what you posted is cheaper ram to use for this, but it will suffice for your laptop.  It is in the range of Dell's acceptable memory specs for the E5540 laptops series.

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