Windows XP doesn't recognize DIMM memory?

  • Thread starter Thread starter limas serafim
  • Start date Start date
L

limas serafim

Hello,

I would appreciate your sugestion for the following trouble:

I upgraded my PC, OS XP, SP3 with 512 MB DIMM memory to get available 1 GB.
However, the OS doesn't recognize the additional 512MB memory as I verified
in Control Panel - System.
BIOS recognizes the memory and SANDRA software also recognizes the new pack.
So, my question is: Why the OS doesn't recognize the new memory? If the OS
doesn't recognize it is like it doesn't exist and so is not useful.

Is there any expert to help in this problem?

Thanks

LS
 
limas serafim said:
Hello,

I would appreciate your sugestion for the following trouble:

I upgraded my PC, OS XP, SP3 with 512 MB DIMM memory to get available 1
GB.
However, the OS doesn't recognize the additional 512MB memory as I
verified
in Control Panel - System.
BIOS recognizes the memory and SANDRA software also recognizes the new
pack.
So, my question is: Why the OS doesn't recognize the new memory? If the OS
doesn't recognize it is like it doesn't exist and so is not useful.

Is there any expert to help in this problem?

Thanks

LS
Click to expand...


Remove the older of the two memory modules and see what happens. If Windows
boots and loads with the new one only, try swapping them in the slots..
 
Hello Mike,

Thanks for answering so quickly!

I restarted my computer with the new DIMM placed in the place of the old one
out. All run quite well and perhaps quicker than before.

The second experiment: I put together the two DIMMS but swapping positions.
Now there was some trouble respecting compatibility and the system
recommended for adjusting in BIOS. As there were a lot of recommendations and
I had to write it down (with pencil and paper) I decided to restarted to
verify if the same happened. But, the result different from the expected: the
system assumed only one memory and restarted as usual.

the old DIMM has the following reference:M2U51264DS8HB5G-5T (512 MB,
DDR-400MHz-CL3 PC 3200U-30330 (elixir)

the new dimm has the reference:
kvr400x64c3a/512 (512 mb pc3200cl3 184-pin dimm (klingston).

Is this information enough for setting up BIOS or other action to put both
memories working together?

Many thanks.

Regards

LS
 
limas serafim said:
Hello Mike,

Thanks for answering so quickly!

I restarted my computer with the new DIMM placed in the place of the old
one
out. All run quite well and perhaps quicker than before.

The second experiment: I put together the two DIMMS but swapping
positions.
Now there was some trouble respecting compatibility and the system
recommended for adjusting in BIOS. As there were a lot of recommendations
and
I had to write it down (with pencil and paper) I decided to restarted to
verify if the same happened. But, the result different from the expected:
the
system assumed only one memory and restarted as usual.

the old DIMM has the following reference:M2U51264DS8HB5G-5T (512 MB,
DDR-400MHz-CL3 PC 3200U-30330 (elixir)

the new dimm has the reference:
kvr400x64c3a/512 (512 mb pc3200cl3 184-pin dimm (klingston).

Is this information enough for setting up BIOS or other action to put both
memories working together?

Many thanks.

Regards

LS
Click to expand...


Although the two modules are the same size, they seem not to like each
other. Your problem is not a new one. It happens more than it should when a
new module is put alongside an aging one.

If you have the funds, buy another 512mb of exactly the same type as the new
one, and sell your old module to make up for the extra expense..
 
Usually the pc wont get that far..1st,both dimm sticks need to be of the same
type (single sided or double sided,chips on 1 or both sides),many pcs will
not
run on single sided memory.If you added 1 or the other,its compatibility
issue,
if both are ok, download the memory tester,chk running old first,run new
solo,
then both,run simple test,it takes 15 minutes or so,any fault shows,end the
test,
one fault is enough.Get the software at:
http://oca.microsoft.com/en/windiag.asp
 
Although the two modules are the same size, they seem not to like each
other. Your problem is not a new one. It happens more than it should whena
new module is put alongside an aging one.

If you have the funds, buy another 512mb of exactly the same type as the new
one, and sell your old module to make up for the extra expense..
Click to expand...

I'd "second" this recommendation as the older DDR module is a "lower"
end generic module. Kingston is a better memory vendor than Simmtec
(the "maker" / vendor of the M2U51264DS8HB5G module
 
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