"Best brain award" if you solve this one!

[Adriaan]

I am running Windows XP Home SP1a, with a DFI AD73 pro
m/board. I originally had 256mb PC2100 DDR, and I have
now purchased an identical 512mb module to upgrade to
768mb. The two modules work perfectly by themselves, but
when they're both onboard the system is very unstable and
slow. Sometimes reboots as soon as it gets to the memory
test. If it manages to start up it hangs within five
minutes.

 

[Crusty \(-: Old B@stard :-\)]

Incompatible RAM - and it doesn't take a brain to realize that. You,
yourself, have said that each works by themselves. That is the clue!

--
Regards:

Richard Urban

aka Crusty (-: Old B@stard

 

[Cerridwen]

I am running Windows XP Home SP1a, with a DFI AD73 pro
m/board. I originally had 256mb PC2100 DDR, and I have
now purchased an identical 512mb module to upgrade to
768mb. The two modules work perfectly by themselves, but
when they're both onboard the system is very unstable and
slow. Sometimes reboots as soon as it gets to the memory
test. If it manages to start up it hangs within five
minutes.

The answer is obvious - you have faulty or incompatible modules. The modules
might be identical to each other but, unless they are also identical to the
module you already have, then it simply won't work. Did you check the
manufacturer's site (the board manufacturer, that is) or www.crucial.com to
see what modules would work with that board? Suggest you download Everest
from here http://www.lavalys.com/index.php?page=product&view=1 and have it
tell you exactly what the 256MB module is. Then you need to purchase a RAM
to match it exactly.

 

[Guest]

How can a 512Mb Module be identcal to a 256Mb Module. Just think about it

Despite the fact that the performance specifications are possibly the same: that is the beginning and the end

What you have written in not so many words, is that a Boeing 737 is identical to a Boeing 767: think about it. They both are made by Boeing, both comply with FAA regulations, both run on Avgas, both have two wings, they both have two engines and so on......just that one is double the capacity of the other

OK I give you the 'not the best brain award'.

 

[Guest]

Exactly the same type! PC2100 (266) DDR SDRAM DIMM

-----Original Message-----
How can a 512Mb Module be identcal to a 256Mb Module. Just think about it.

Despite the fact that the performance specifications are

possibly the same: that is the beginning and the end.

What you have written in not so many words, is that a

Boeing 737 is identical to a Boeing 767: think about it.
They both are made by Boeing, both comply with FAA
regulations, both run on Avgas, both have two wings, they
both have two engines and so on......just that one is
double the capacity of the other!

 

[Guest]

I have run diagnostics software and the stats on the 256
and the 512 are identical... apart from the size,
obviously.

 

[Guest]

.... and thank you sir, for not being as sarcastic as some
others.

 

[ChrisM]

Except on some older systems where memory needed to be added in pairs, it
seems unlikely that you can only add memory modules that are exactly the
same size (256Mb 512Mb etc) as the existing one. You should be able to mix
and match module sizes, as long as the type and speed are the same...

ChrisM

How can a 512Mb Module be identcal to a 256Mb Module. Just think about it.

Despite the fact that the performance specifications are possibly the

same: that is the beginning and the end.

What you have written in not so many words, is that a Boeing 737 is

identical to a Boeing 767: think about it. They both are made by Boeing,
both comply with FAA regulations, both run on Avgas, both have two wings,
they both have two engines and so on......just that one is double the
capacity of the other!

 

[ChrisM]

Are you getting an error message/blue screen? or just rebooting/hanging?

I have a similar problem (see my post 'HP Pavilion ACPI Error' No solution
at the moment I'm afraid)
I'll let you know if I find anything out though.

ChrisM

 

[Guest]

I had that problem because I was given a PC2700 instead
of a PC2100. Blue screen, boot sector corrupt, etc. Now I
got the right type PC2100, no more blue screen, but very
unstable.

 

[Haus]

Hello Adrian
I have found that XP is very ram friendly but at the same time it is very
picky, where on the older OS mixing ram sizes would not cause any problems,
it is just the opposite with XP. For example if you want 768meg ram use
3x256, provided you have 3 slots or 2x256, 2x512 and so on, just make sure
they are the same size and speed.
This is just what I have found with computer upgrading, I have no idea what
it is with XP, maybe just my luck.


--
Hope This Helps
Haus
Not a MVP
Not a MS-MVP
Not nothing just a good ole boy..

 

[Cerridwen]

How can a 512Mb Module be identcal to a 256Mb Module. Just think
about it.

Despite the fact that the performance specifications are possibly the
same: that is the beginning and the end.

What you have written in not so many words, is that a Boeing 737 is
identical to a Boeing 767: think about it. They both are made by
Boeing, both comply with FAA regulations, both run on Avgas, both
have two wings, they both have two engines and so on......just that
one is double the capacity of the other!

OK I give you the 'not the best brain award'.

Quite easily you moron. They can be identical in all but size - of course
they can.

What you've typed is unadulterated B.S.

 

[Adriaan]

Thanx Dude. Someone else just told me the same thing. I
think it might be the answer.

 

[Kenny]

they should work, but we do not live in a perfect world, and it seems
that the 2 memories are not totally compatible with each other.
Take the new memory back and ask if you can change it with another brand and
try again.

 

[Guest]

Just so you know... Avgas is for propellor driven planes,
a Boeing flies on kerosene.

-----Original Message-----
How can a 512Mb Module be identcal to a 256Mb Module. Just think about it.

Despite the fact that the performance specifications are

possibly the same: that is the beginning and the end.

What you have written in not so many words, is that a

Boeing 737 is identical to a Boeing 767: think about it.
They both are made by Boeing, both comply with FAA
regulations, both run on Avgas, both have two wings, they
both have two engines and so on......just that one is
double the capacity of the other!

 

[Haus]

Hello
Your Welcome
Good Luck

--
Hope This Helps
Haus
Not a MVP
Not a MS-MVP
Not nothing just a good ole boy..

 

[Jim Macklin]

Some mobo require the largest stick to be in the 0 slot, try
the 512 in the first slot and the other stick in the next
slot. Your mobo manual should say something about this if
it is a factor.


--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.


| Hello
| Your Welcome
| Good Luck
|
| --
| Hope This Helps
| Haus
| Not a MVP
| Not a MS-MVP
| Not nothing just a good ole boy..
message
| | > Thanx Dude. Someone else just told me the same thing. I
| > think it might be the answer.
| >
| >
| > >-----Original Message-----
| > >Hello Adrian
| > >I have found that XP is very ram friendly but at the
| > same time it is very
| > >picky, where on the older OS mixing ram sizes would not
| > cause any problems,
| > >it is just the opposite with XP. For example if you
want
| > 768meg ram use
| > >3x256, provided you have 3 slots or 2x256, 2x512 and so
| > on, just make sure
| > >they are the same size and speed.
| > >This is just what I have found with computer upgrading,
| > I have no idea what
| > >it is with XP, maybe just my luck.
| > >
| > >
| > >--
| > >Hope This Helps
| > >Haus
| > >Not a MVP
| > >Not a MS-MVP
| > >Not nothing just a good ole boy..
in
| > message
| > >| > >> I am running Windows XP Home SP1a, with a DFI AD73
pro
| > >> m/board. I originally had 256mb PC2100 DDR, and I
have
| > >> now purchased an identical 512mb module to upgrade to
| > >> 768mb. The two modules work perfectly by themselves,
| > but
| > >> when they're both onboard the system is very unstable
| > and
| > >> slow. Sometimes reboots as soon as it gets to the
| > memory
| > >> test. If it manages to start up it hangs within five
| > >> minutes.
| > >
| > >
| > >.
| > >
|
|

 

[Papatoes]

did you try swapping slots? put the larger stick in slot 1. I had the same
problem with mine and the swap fixed it.
good luck
Papatoes

 

[Haus]

Hello

Just so you know... Avgas is for propeller driven planes,

a Boeing flies on kerosene.

That is also correct

You have just received another best brain award.

--
Hope This Helps
Haus
Not a MVP
Not a MS-MVP
Not nothing just a good ole boy..

 

[Peter R. Fletcher]

Is it possible that your power supply is marginal and the extra stick
of Ram is the last straw? A fairly easy check for this would be to
boot without any internal drives plugged in and/or with the minimum
storage setup you can run with.

I am running Windows XP Home SP1a, with a DFI AD73 pro
m/board. I originally had 256mb PC2100 DDR, and I have
now purchased an identical 512mb module to upgrade to
768mb. The two modules work perfectly by themselves, but
when they're both onboard the system is very unstable and
slow. Sometimes reboots as soon as it gets to the memory
test. If it manages to start up it hangs within five
minutes.

Please respond to the Newsgroup, so that others may benefit from the exchange.
Peter R. Fletcher