2gb Ram showing as 1.5gb

Hi,

I have an HP Microtower  (HP DC5100M,P4-530). I've installed 2x 1gb DDR2 533mhz chips in the machine and the bios is only showing 1.536gb of RAM.

Each RAM module will show as 1gb in the bios if installed alone, but will only show up as 1.5gb if installed together. I have tried installing the RAM in slots 1&2 (shows as single channel) and then in 1&3 which shows as (asynchronous) in the bios.

I know I've come across this before, but I can't remember what the cause is. Is it because the motherboard needs a matched pair? I have 3 slots.

 
thinkjimAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Arabia_vnCommented:
That amount of Ram is used by your onboard graphic card, i guess. You can enter Bios to reduce memory shared for onboard Graphic
0
ChrisDennCommented:
Graphic Card should only use 128MB if you see the specs.

http://h18000.www1.hp.com/products/quickspecs/12145_na/12145_na.PDF

See "Memory" for detailed informations about how to install your memory correctly.
 
Does your Mainboard really have 3 Memory Slots or what do you mean with "I have 3 slots"?
0
Arabia_vnCommented:
Sorry i did not read carefully. Try entering bios to find "Memory mapping" option and enable it.
0
Cloud Class® Course: Ruby Fundamentals

This course will introduce you to Ruby, as well as teach you about classes, methods, variables, data structures, loops, enumerable methods, and finishing touches.

PorpathamCommented:
Hi,
No need to worry in this because display way sharing the memmory. or u may allocate the memmory for paging file.

Kindly check both of them.
0
samsymonCommented:
Please check that your motherboard supports 2 gb ram.

0
samsymonCommented:
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Components

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.