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I have an HP ENVY h8-1414 and it has four 8GB dimms in it.

Corsair CMZ8GX3M2A1600C98

The machine should support 32GB of RAM according to the website but only 16 GB of it is being picked up.

I've looked at the settings in CPU-Z and here is what they look like: Slot #1
(it's all the same kind of RAM)

What do I need to do to get the additional 16GB of RAM that aren't being recognized?

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1  
Do you see the 32GB in the BIOS/UEFI? If yes, which OS do you use? The Home Editions of Windows are limited to 16GB RAM (Vista/7 Home Premium) –  magicandre1981 Jan 30 '13 at 20:19
    
are all 4 chips of the same size and speed? have you tried reseating the ram? I would contact HP. on my last laptop (dv910us) I needed an updated bois from them before the new ram would be recognized, despite being well within the limitations of the boards specs. –  Frank Thomas Jan 30 '13 at 20:23
    
@magicandre1981 - I think you have hit the nail on the head. The max mem on home prem is 16GB. CPU - Z is picking up that that particular stick is representing 4GB. –  Carl B Jan 30 '13 at 20:28
    
@magicandre1981 No actually I don't see it in the bios. Maybe I do need to update the bios –  leeand00 Jan 30 '13 at 20:37
    
make sure the memory remapping function is enabled in the BIOS. Is the RAM compatible with your board? Have you checked the memory list? –  magicandre1981 Jan 30 '13 at 21:32

2 Answers 2

up vote 4 down vote accepted

The module shown in your list is a 4GB module, if you have 4 of those modules then you only have 16GB.

What you have bought is two 8GB dual-channel kits. The kit means that it will provide a total of 8GB.

From Corsair

Product Description

High-performance 8GB Vengeance Dual Channel Kit, 1600MHz, 9-9-9-24, 1.5V Key Features

Package Contents

Two 4GB memory modules

-=Original Answer=-

It may well be that you have a memory limited edition of Windows and may need to upgrade to a higher edition to use the extra memory. Windows 7 Home Premium 64-bit has a limit of 16 GB. Windows 8 (standard) is limited to 128GB

From Windows Physical Memory Limits:

Version                 Limit on X86       Limit on X64
Windows 7 Ultimate      4 GB                192 GB
Windows 7 Enterprise    4 GB                192 GB
Windows 7 Professional  4 GB                192 GB
Windows 7 Home Premium  4 GB                16 GB
Windows 7 Home Basic    4 GB                8 GB
Windows 7 Starter       2 GB                N/A
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I now notice that written on it is 8GB (2x4GB)...I didn't buy this, I was given it, they told me these were 8GB Dimms and when I looked at the part that says 8GB on the Dimm I stopped reading. Never seen RAM labeled that way. Thanks. –  leeand00 Jan 31 '13 at 1:47

If the link provided for the RAM modules is correct, you don't have four 8GB Dimms, but four 4GB dimms. The websites says, that it is an 8 GB Kit, consisting of two 4GB modules. That would also fit CPU-Z reading of the SPD data from the dimm.

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