Thank you for being a valued part of the CNET community. As of December 1, 2020, the forums are in read-only format. In early 2021, CNET Forums will no longer be available. We are grateful for the participation and advice you have provided to one another over the years.

Thanks,

CNET Support

Question

Totally confused ... need memory for i7 4790 ....

Mar 7, 2018 7:15PM PST

Hello, I have been trying for hours to understand what memory I need.

The computer is three or four years old. It is an HP Z230 with a I7 4790 processor. Two slots are taken up by 8 gb of memory, I what to add 8 gb more.

The manual says :"i5/i7 processors only support non-ECC memory"

Then it starts talking about CTO and AMO .... hmmmmm??????

It lists "DDR3-1600 non-ECC RAM" in one spot and "DDR3-1600-nECC RAM" in another spot ... are these the same?

That is all they list.

When I start looking on the web there are soooooo many chooses. Of coarse I want to spend the minimum I have to. Some lists "PC3-12800" .. some says PC3-12800R ... some say 1.35 volt and others 1.5 volt ....

Then I haven't even gotten into CAS ... I have not idea what this means!

Price seems to be from about $40 ( $20 per 4 gb stick) to $150!

Can someone please straighten me out!

If I go on Amazon or Ebay, what do I look for? Doesn't have to be new ... just decent quality.

What do I need to work with this machine?

Thanks so very much .... Mike

Discussion is locked

- Collapse -
Answer
More informat ... still need help!
Mar 7, 2018 9:44PM PST

So, on top of this, I just got a note from a friend saying I need to throw away the 8 gig (two 4 gig sticks) in the machine and buy 16 gig of "matched" memory.

Is this true? I don't want to add $160 to the price of the machine!

Help!

Mike

- Collapse -
Ram
Mar 8, 2018 2:21AM PST

Pull out a stick of ram that's in the machine now and read the label.

Plug that part number into google and shop for a 2x4GB kit.