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Mixing diff ram types

 
 
mark
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      01-01-2009
A friend has a 2nd hand computer which comes with DDR333 PC2700 RAM.
The CPU is P4 2.66Ghz. The motherboard has 4 slots which a paired
(interleaved). (HP D350 Presario i think).
He wanted to upgrade the RAM and a PC specialist shop sold him DDR400 PC
3200 RAM.
Since doing so he has had constant crashes.
But they go away when the DDR400 RAM is removed.
Either the 333 & 400 RAM are not co-operating properly or the
motherboard does not support the DDR400 RAM.
Is it either or both? Would DDR400 only RAM do?
I am a computer geek of sorts but I am not a PC hardware expert (Mac
User I am).

TIA
Mark
 
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greg
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      01-01-2009
mark wrote:
> A friend has a 2nd hand computer which comes with DDR333 PC2700 RAM.
> The CPU is P4 2.66Ghz. The motherboard has 4 slots which a paired
> (interleaved). (HP D350 Presario i think).
> He wanted to upgrade the RAM and a PC specialist shop sold him DDR400 PC
> 3200 RAM.
> Since doing so he has had constant crashes.
> But they go away when the DDR400 RAM is removed.
> Either the 333 & 400 RAM are not co-operating properly or the
> motherboard does not support the DDR400 RAM.
> Is it either or both? Would DDR400 only RAM do?
> I am a computer geek of sorts but I am not a PC hardware expert (Mac
> User I am).
>
> TIA
> Mark



there is your answer, don't mix the speeds, it causes crashes
 
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peterwn
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      01-01-2009
On Jan 1, 5:09 pm, mark <(E-Mail Removed)> wrote:
> A friend has a 2nd hand computer which comes with DDR333 PC2700 RAM.
> The CPU is P4 2.66Ghz. The motherboard has 4 slots which a paired
> (interleaved). (HP D350 Presario i think).
> He wanted to upgrade the RAM and a PC specialist shop sold him DDR400 PC
> 3200 RAM.
> Since doing so he has had constant crashes.
> But they go away when the DDR400 RAM is removed.
> Either the 333 & 400 RAM are not co-operating properly or the
> motherboard does not support the DDR400 RAM.
> Is it either or both? Would DDR400 only RAM do?
> I am a computer geek of sorts but I am not a PC hardware expert (Mac
> User I am).
>


Try swapping the ram between the 'sockets'. The BIOS may 'test' the
first socket and assume RAM in the other sockets is of the same
speed. Putting the slowest RAM in the 'testing' socket may solve the
problem.

 
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Peter M
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      01-01-2009
On Thu, 01 Jan 2009 17:09:51 +1300, mark <(E-Mail Removed)> wrote:

>A friend has a 2nd hand computer which comes with DDR333 PC2700 RAM.
>The CPU is P4 2.66Ghz. The motherboard has 4 slots which a paired
>(interleaved). (HP D350 Presario i think).
>He wanted to upgrade the RAM and a PC specialist shop sold him DDR400 PC
>3200 RAM.
>Since doing so he has had constant crashes.
>But they go away when the DDR400 RAM is removed.
>Either the 333 & 400 RAM are not co-operating properly or the
>motherboard does not support the DDR400 RAM.
>Is it either or both? Would DDR400 only RAM do?
>I am a computer geek of sorts but I am not a PC hardware expert (Mac
>User I am).
>
>TIA
>Mark




If you are trying to run dual channel that Ram must be identical types, but
some mother boards can be fussy with the Types of Ram used, faster Ram is not
the problem.

To check the 400 RAM remove the 333 Ram..

I suggest you get Rams of the same speed Type & brand..


 
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Peter M
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      01-01-2009
On Wed, 31 Dec 2008 23:06:32 -0800 (PST), peterwn <(E-Mail Removed)>
wrote:

>On Jan 1, 5:09 pm, mark <(E-Mail Removed)> wrote:
>> A friend has a 2nd hand computer which comes with DDR333 PC2700 RAM.
>> The CPU is P4 2.66Ghz. The motherboard has 4 slots which a paired
>> (interleaved). (HP D350 Presario i think).
>> He wanted to upgrade the RAM and a PC specialist shop sold him DDR400 PC
>> 3200 RAM.
>> Since doing so he has had constant crashes.
>> But they go away when the DDR400 RAM is removed.
>> Either the 333 & 400 RAM are not co-operating properly or the
>> motherboard does not support the DDR400 RAM.
>> Is it either or both? Would DDR400 only RAM do?
>> I am a computer geek of sorts but I am not a PC hardware expert (Mac
>> User I am).
>>

>
>Try swapping the ram between the 'sockets'. The BIOS may 'test' the
>first socket and assume RAM in the other sockets is of the same
>speed. Putting the slowest RAM in the 'testing' socket may solve the
>problem.



RAM on my MoBo does not go in adjacent slots, the slots are colour coded to
help you..


 
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Richard
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      01-01-2009
mark wrote:
> A friend has a 2nd hand computer which comes with DDR333 PC2700 RAM.
> The CPU is P4 2.66Ghz. The motherboard has 4 slots which a paired
> (interleaved). (HP D350 Presario i think).
> He wanted to upgrade the RAM and a PC specialist shop sold him DDR400 PC
> 3200 RAM.
> Since doing so he has had constant crashes.
> But they go away when the DDR400 RAM is removed.
> Either the 333 & 400 RAM are not co-operating properly or the
> motherboard does not support the DDR400 RAM.
> Is it either or both? Would DDR400 only RAM do?
> I am a computer geek of sorts but I am not a PC hardware expert (Mac
> User I am).


I have had this on a couple of old computers with all slots populated.
Changing to different ram solved the problem, you might want to try
lowering the ram timing so slower ones, if the HP bios allows for it
that is, they are hardly flexible in their clock options.

 
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~misfit~
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      01-01-2009
Somewhere on teh intarwebs "mark" typed:
> A friend has a 2nd hand computer which comes with DDR333 PC2700 RAM.
> The CPU is P4 2.66Ghz. The motherboard has 4 slots which a paired
> (interleaved). (HP D350 Presario i think).
> He wanted to upgrade the RAM and a PC specialist shop sold him DDR400
> PC 3200 RAM.
> Since doing so he has had constant crashes.
> But they go away when the DDR400 RAM is removed.
> Either the 333 & 400 RAM are not co-operating properly or the
> motherboard does not support the DDR400 RAM.
> Is it either or both? Would DDR400 only RAM do?
> I am a computer geek of sorts but I am not a PC hardware expert (Mac
> User I am).


What brand and model is the new RAM? Is it specified to run at nominal
voltage (2.5v?) Some faster RAM did so by dint of having higher voltage.
Granted it's been a long time since that was the case with DDR (not 2) but
maybe shop in question was getting rid of old stock?

Is your friend hardware savvy? Does he know how to take basic anti-static
precautions when fitting comnponents?

(It's not the rated speed of the RAM causing the problem (unless it's due to
not enough voltage as mentioned above). All DDR RAM is backwards-compatible
speed-wise, the motherboard sets the speed. Even if the BIOS is set to run
the RAM speed by what it's rated at ("By SPD") it should run at the lower
speed of any of the RAM modules fitted, in this case DDR333.

Another thing is that HP / Compaq / IBM / Dell etc. can sometimes be fussier
than your average no-name machine when it comes to RAM.

My gut feeling is that he has a bad stick (and the cynic in me wouldn't be
surprised if the "PC specialist shop" knew it was flakey and was hoping it'd
be fine at the lower speed).

Cheers,
--
Shaun.


 
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mark
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Posts: n/a
 
      01-02-2009
In article <gji92h$pmr$(E-Mail Removed)>,
"~misfit~" <(E-Mail Removed)> wrote:

> Somewhere on teh intarwebs "mark" typed:
> > A friend has a 2nd hand computer which comes with DDR333 PC2700 RAM.
> > The CPU is P4 2.66Ghz. The motherboard has 4 slots which a paired
> > (interleaved). (HP D350 Presario i think).
> > He wanted to upgrade the RAM and a PC specialist shop sold him DDR400
> > PC 3200 RAM.
> > Since doing so he has had constant crashes.
> > But they go away when the DDR400 RAM is removed.
> > Either the 333 & 400 RAM are not co-operating properly or the
> > motherboard does not support the DDR400 RAM.
> > Is it either or both? Would DDR400 only RAM do?
> > I am a computer geek of sorts but I am not a PC hardware expert (Mac
> > User I am).

>
> What brand and model is the new RAM? Is it specified to run at nominal
> voltage (2.5v?) Some faster RAM did so by dint of having higher voltage.
> Granted it's been a long time since that was the case with DDR (not 2) but
> maybe shop in question was getting rid of old stock?
>
> Is your friend hardware savvy? Does he know how to take basic anti-static
> precautions when fitting comnponents?
>
> (It's not the rated speed of the RAM causing the problem (unless it's due to
> not enough voltage as mentioned above). All DDR RAM is backwards-compatible
> speed-wise, the motherboard sets the speed. Even if the BIOS is set to run
> the RAM speed by what it's rated at ("By SPD") it should run at the lower
> speed of any of the RAM modules fitted, in this case DDR333.
>
> Another thing is that HP / Compaq / IBM / Dell etc. can sometimes be fussier
> than your average no-name machine when it comes to RAM.
>
> My gut feeling is that he has a bad stick (and the cynic in me wouldn't be
> surprised if the "PC specialist shop" knew it was flakey and was hoping it'd
> be fine at the lower speed).
>
> Cheers,


Originally he bought a 1GB DDR400 RAM.
It caused problems.
Went back and got 2 512 DDR400 RAM.
Still caused problems.
It's a shop called PBT on Porana Rd, Glenfield.
Thanks for the advice.
 
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~misfit~
Guest
Posts: n/a
 
      01-02-2009
Somewhere on teh intarwebs "mark" typed:
> In article <gji92h$pmr$(E-Mail Removed)>,
> "~misfit~" <(E-Mail Removed)> wrote:
>
>> Somewhere on teh intarwebs "mark" typed:
>>> A friend has a 2nd hand computer which comes with DDR333 PC2700 RAM.
>>> The CPU is P4 2.66Ghz. The motherboard has 4 slots which a paired
>>> (interleaved). (HP D350 Presario i think).
>>> He wanted to upgrade the RAM and a PC specialist shop sold him
>>> DDR400 PC 3200 RAM.
>>> Since doing so he has had constant crashes.
>>> But they go away when the DDR400 RAM is removed.
>>> Either the 333 & 400 RAM are not co-operating properly or the
>>> motherboard does not support the DDR400 RAM.
>>> Is it either or both? Would DDR400 only RAM do?
>>> I am a computer geek of sorts but I am not a PC hardware expert (Mac
>>> User I am).

>>
>> What brand and model is the new RAM? Is it specified to run at
>> nominal voltage (2.5v?) Some faster RAM did so by dint of having
>> higher voltage. Granted it's been a long time since that was the
>> case with DDR (not 2) but maybe shop in question was getting rid of
>> old stock?
>>
>> Is your friend hardware savvy? Does he know how to take basic
>> anti-static precautions when fitting comnponents?
>>
>> (It's not the rated speed of the RAM causing the problem (unless
>> it's due to not enough voltage as mentioned above). All DDR RAM is
>> backwards-compatible speed-wise, the motherboard sets the speed.
>> Even if the BIOS is set to run the RAM speed by what it's rated at
>> ("By SPD") it should run at the lower speed of any of the RAM
>> modules fitted, in this case DDR333.
>>
>> Another thing is that HP / Compaq / IBM / Dell etc. can sometimes be
>> fussier than your average no-name machine when it comes to RAM.
>>
>> My gut feeling is that he has a bad stick (and the cynic in me
>> wouldn't be surprised if the "PC specialist shop" knew it was flakey
>> and was hoping it'd be fine at the lower speed).

>
> Originally he bought a 1GB DDR400 RAM.
> It caused problems.
> Went back and got 2 512 DDR400 RAM.
> Still caused problems.
> It's a shop called PBT on Porana Rd, Glenfield.
> Thanks for the advice.


All I can suggest at this stage is to throuroughly clean the slots. In a PC
that old where they've been unopoulated for a few years there's a good
chance that they're half-full of dust. I use CO cleaner from DSE for the job
but at $27 a can it's not something you want to spray around the place
willy-nilly.

Cheers,
--
Shaun.


 
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Je|
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Posts: n/a
 
      01-03-2009
"greg" <(E-Mail Removed)> wrote in message
news:gjhp9l$l3g$(E-Mail Removed)...
> mark wrote:
>> A friend has a 2nd hand computer which comes with DDR333 PC2700 RAM.
>> The CPU is P4 2.66Ghz. The motherboard has 4 slots which a paired
>> (interleaved). (HP D350 Presario i think).
>> He wanted to upgrade the RAM and a PC specialist shop sold him DDR400 PC
>> 3200 RAM.
>> Since doing so he has had constant crashes.
>> But they go away when the DDR400 RAM is removed.
>> Either the 333 & 400 RAM are not co-operating properly or the motherboard
>> does not support the DDR400 RAM.
>> Is it either or both? Would DDR400 only RAM do?
>> I am a computer geek of sorts but I am not a PC hardware expert (Mac User
>> I am).
>>
>> TIA
>> Mark

>
>
> there is your answer, don't mix the speeds, it causes crashes


No it doesn't, the faster RAM steps down. This is a common fallacy that no
longer applies.

J&H.


 
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