Sign in with
Sign up | Sign in
Your question
Solved

Laptop does not recognize first RAM after install of second RAM

Last response: in Memory
Share
December 31, 2011 11:20:28 AM

Hi,

I have an old HP Compaq 8510w notebook, which came with 2GB RAM. According to the specs, this machine supports up to 8 GBs (http://h18000.www1.hp.com/products/quickspecs/12727_na/...). The originally installed RAM has part number HYMP325S64AMP8-Y5. It is DDR2 at 667 MHz (see here, e.g., for specs: http://www.memory4less.com/m4l_itemdetail.aspx?itemid=1...).

My other laptop recently died and has 2 1GB RAM sticks that are also DDR2 at 667 MHz. They each have part number hys64t128021hdl-3s-b (see here, e.g., for specs which match the original RAM stick except in memory size: http://www.memory4less.com/m4l_itemdetail.aspx?itemId=2...).

When I put one of these 1GB sticks into the laptop, only the new one is recognized and not the old one. I checked the OS, BIOS, and CPU-Z. I switched around memory slots and tried both 1 GB RAM sticks, but still I only have the computer recognizing 1 GB RAM.

Can anyone help me resolve this, or is there is something incompatible that I just do not realize?

Thanks,
Jon

Best solution

a c 78 } Memory
December 31, 2011 12:48:30 PM
Share

Does the notebook recognize 2 GB when both 1 GB modules are installed? If so, then the 1 GB + 2 GB combination might not be supported.
a c 78 } Memory
December 31, 2011 12:49:34 PM

Does the notebook recognize 2 GB when both 1 GB modules are installed? If so, then the 1 GB + 2 GB combination might not be supported.
Related resources
December 31, 2011 1:40:03 PM

The notebook does recognize both 1 GB modules when they are installed. The 1GB + 2GB might not be compatible as you said. Is there somewhere I could find that type of information?
December 31, 2011 1:46:02 PM

I did some more investigating, and I did find a spec for the computer that said it only supports dual channel symmetric memory. So I guess you are correct. Thanks for the help.
December 31, 2011 1:46:50 PM

Best answer selected by jon905.
a c 78 } Memory
December 31, 2011 2:35:00 PM

jon905 said:
I did some more investigating, and I did find a spec for the computer that said it only supports dual channel symmetric memory. So I guess you are correct. Thanks for the help.

I asked because the table in the PDF document only included single channel memory or dual symmetric memory; no other combinations were suggested.
!