Check your installation manual. I think you have to populate the memory
slots evenly, i.e. 1gb in A1 & B1 and then you would need another 512mb to
populate A2 & B2.
John
"Daniel" <noone@nowhere.com> wrote in message
news:Ty1Xi.8294$CN4.6821@news-server.bigpond.net.au...
> Hi
> I have a P5SD2-X motherboard with 2 x1 gig and 1 x 512 Meg RAM.
> What would be the best RAM placement for gaming?
>
> 1 x 1 Gig each in slots A1 and A2 and 1 x 512 in slot B1
> or
> 1 x 1 Gig in A1, 1 x 1 Gig in B1 and 1 x 512 in A2
>
> thanks
>
> Daniel
>
>
>
"Joel" <Joel@NoSpam.com> wrote in message
news:fubpi3lisur5t8j7h6ri8c56q1gm8122l5@4ax.com...
> "Daniel" <noone@nowhere.com> wrote:
>
>> Hi
>> I have a P5SD2-X motherboard with 2 x1 gig and 1 x 512 Meg RAM.
>> What would be the best RAM placement for gaming?
>
> "The best RAM" is the one works with your momboard
>
>> 1 x 1 Gig each in slots A1 and A2 and 1 x 512 in slot B1
>> or
>> 1 x 1 Gig in A1, 1 x 1 Gig in B1 and 1 x 512 in A2
>
> I am having seeing the picture you try to draw here.
>
> 1. Do you want to install 2.5GB to your system?
Yes I do
> 2. Do you want to install 1.5GB on your system?
No! 2.5 Gig
> 3. Do you already have all those RAM or planning to yet?
I have them
> And you better check to see the limiation of your momboard like
> - MAX memory
4 Gig
> - Max number of memory card can be installed
4
> - Max memory it accepts etc..
4Gig
> Example, my momboard except up to 4GB of memory *but* it will only accept
> no more than 4 (I dunno what to call it so see below for explaination)
>
> 1Gx2 = count as TWO (or it acts as (2) 512MB)
> 1Gx1 = count as ONE
> 2Gx1 = count as ONE
I think you are rught bit I have the extra 512,
if I install it into A2 will it hurt?
cheers
Daniel
"John Smith" <oldibm66@cableone.net> wrote in message
news:13ipchfj72pki2a@corp.supernews.com...
> Check your installation manual. I think you have to populate the memory
> slots evenly, i.e. 1gb in A1 & B1 and then you would need another 512mb to
> populate A2 & B2.
> John
> "Daniel" <noone@nowhere.com> wrote in message
> news:Ty1Xi.8294$CN4.6821@news-server.bigpond.net.au...
>> Hi
>> I have a P5SD2-X motherboard with 2 x1 gig and 1 x 512 Meg RAM.
>> What would be the best RAM placement for gaming?
>>
>> 1 x 1 Gig each in slots A1 and A2 and 1 x 512 in slot B1
>> or
>> 1 x 1 Gig in A1, 1 x 1 Gig in B1 and 1 x 512 in A2
>>
>> thanks
>>
>> Daniel
>>
>>
>>
>
>
Somewhere on the interweb "Daniel" typed:
> John
>
> I think you are rught bit I have the extra 512,
> if I install it into A2 will it hurt?
It depends what you push it in with, or if anything sensitive gets caught in
the slot....
Seriously though, I swear people think that some of us here have nothing
better to do than run around after them answering simple questions that,
with very little time, they could answer themsleves. Open your browser, then
cut'n paste (or copy) the below URL into the address field and hit <Enter>:
You should find the information you require there. (Hint: The answer you
need is on page 28. I'm not doing everything for you, read it. In fact, save
it or print it out.)
FYI I typed "P5SD2-X download" into Google and found the manual within 20
seconds. Longer than it took me to write this post. This took several
minutes of my precious life that I'm never going to get back. When I'm dying
I'll probably look back on this with regret, wishing I had these few minutes
back again....
<sigh>
> Daniel
> "John Smith" <oldibm66@cableone.net> wrote in message
> news:13ipchfj72pki2a@corp.supernews.com...
> > Check your installation manual. I think you have to populate the
> > memory slots evenly, i.e. 1gb in A1 & B1 and then you would need
> > another 512mb to populate A2 & B2.
> > John
> > "Daniel" <noone@nowhere.com> wrote in message
> > news:Ty1Xi.8294$CN4.6821@news-server.bigpond.net.au...
> > > Hi
> > > I have a P5SD2-X motherboard with 2 x1 gig and 1 x 512 Meg RAM.
> > > What would be the best RAM placement for gaming?
> > >
> > > 1 x 1 Gig each in slots A1 and A2 and 1 x 512 in slot B1
> > > or
> > > 1 x 1 Gig in A1, 1 x 1 Gig in B1 and 1 x 512 in A2
> > >
> > > thanks
> > >
> > > Daniel
~misfit~ wrote:
> Somewhere on the interweb "Daniel" typed:
>> John
>>
>> I think you are rught bit I have the extra 512,
>> if I install it into A2 will it hurt?
>
> It depends what you push it in with, or if anything sensitive gets caught in
> the slot....
>
> Seriously though, I swear people think that some of us here have nothing
> better to do than run around after them answering simple questions that,
> with very little time, they could answer themsleves. Open your browser, then
> cut'n paste (or copy) the below URL into the address field and hit <Enter>:
>
> <http://dlsvr03.asus.com/pub/ASUS/mb/socket775/P5SD2-X/E2026_P5SD2-X.pdf>
>
> You should find the information you require there. (Hint: The answer you
> need is on page 28. I'm not doing everything for you, read it. In fact, save
> it or print it out.)
>
> FYI I typed "P5SD2-X download" into Google and found the manual within 20
> seconds. Longer than it took me to write this post. This took several
> minutes of my precious life that I'm never going to get back. When I'm dying
> I'll probably look back on this with regret, wishing I had these few minutes
> back again....
>
> <sigh>
>
The manual says, for optimum performance A1 + A2 = B1 + B2. If you violate
that rule, by using an unbalanced RAM configuration, the board would run
in single channel mode. That means a reduction in memory bandwidth. If
it was my board, I'd use 2x1GB in A1 and B1, and I'd leave the 512MB
stick in my desk drawer.
Paul
>
>> Daniel
>> "John Smith" <oldibm66@cableone.net> wrote in message
>> news:13ipchfj72pki2a@corp.supernews.com...
>>> Check your installation manual. I think you have to populate the
>>> memory slots evenly, i.e. 1gb in A1 & B1 and then you would need
>>> another 512mb to populate A2 & B2.
>>> John
>>> "Daniel" <noone@nowhere.com> wrote in message
>>> news:Ty1Xi.8294$CN4.6821@news-server.bigpond.net.au...
>>>> Hi
>>>> I have a P5SD2-X motherboard with 2 x1 gig and 1 x 512 Meg RAM.
>>>> What would be the best RAM placement for gaming?
>>>>
>>>> 1 x 1 Gig each in slots A1 and A2 and 1 x 512 in slot B1
>>>> or
>>>> 1 x 1 Gig in A1, 1 x 1 Gig in B1 and 1 x 512 in A2
>>>>
>>>> thanks
>>>>
>>>> Daniel
>
>
>
Somewhere on the interweb "Paul" typed:
> ~misfit~ wrote:
> > Somewhere on the interweb "Daniel" typed:
> > > John
> > >
> > > I think you are rught bit I have the extra 512,
> > > if I install it into A2 will it hurt?
> >
> > It depends what you push it in with, or if anything sensitive gets
> > caught in the slot....
> >
> > Seriously though, I swear people think that some of us here have
> > nothing better to do than run around after them answering simple
> > questions that, with very little time, they could answer
> > themsleves. Open your browser, then cut'n paste (or copy) the below
> > URL into the address field and hit <Enter>:
> > <http://dlsvr03.asus.com/pub/ASUS/mb/socket775/P5SD2-X/E2026_P5SD2-X.pdf>
> >
> > You should find the information you require there. (Hint: The
> > answer you need is on page 28. I'm not doing everything for you,
> > read it. In fact, save it or print it out.)
> >
> > FYI I typed "P5SD2-X download" into Google and found the manual
> > within 20 seconds. Longer than it took me to write this post. This
> > took several minutes of my precious life that I'm never going to
> > get back. When I'm dying I'll probably look back on this with
> > regret, wishing I had these few minutes back again....
> >
> > <sigh>
> >
>
> The manual says, for optimum performance A1 + A2 = B1 + B2. If you
> violate that rule, by using an unbalanced RAM configuration, the
> board would run in single channel mode. That means a reduction in
> memory bandwidth. If it was my board, I'd use 2x1GB in A1 and B1, and I'd
> leave the 512MB
> stick in my desk drawer.
If it were my board I would too. However, I don't edit several files in
Photoshop at once or use my machine for similar memory-intensive tasks where
size is more important than speed. However, if I were gaming (as the OP
intimated in his OP) then I'd do as you suggest. Different strokes and all
that. Hence my providing of the location of the relevant info and allowing
the OP to decide for himself. I try to encourage people to think for
themselves. In modern society everyone wants it on a plate, yesterday,
without having earned it.
These kids have got to grow up and start looking after themselves one day
Paul, they can't live at home forever.
--
TTFN
Shaun.
> > > Daniel
> > > "John Smith" <oldibm66@cableone.net> wrote in message
> > > news:13ipchfj72pki2a@corp.supernews.com...
> > > > Check your installation manual. I think you have to populate the
> > > > memory slots evenly, i.e. 1gb in A1 & B1 and then you would need
> > > > another 512mb to populate A2 & B2.
> > > > John
> > > > "Daniel" <noone@nowhere.com> wrote in message
> > > > news:Ty1Xi.8294$CN4.6821@news-server.bigpond.net.au...
> > > > > Hi
> > > > > I have a P5SD2-X motherboard with 2 x1 gig and 1 x 512 Meg
> > > > > RAM. What would be the best RAM placement for gaming?
> > > > >
> > > > > 1 x 1 Gig each in slots A1 and A2 and 1 x 512 in slot B1
> > > > > or
> > > > > 1 x 1 Gig in A1, 1 x 1 Gig in B1 and 1 x 512 in A2
> > > > >
> > > > > thanks
> > > > >
> > > > > Daniel
Somewhere on the interweb "Paul" typed:
> ~misfit~ wrote:
> > Somewhere on the interweb "Daniel" typed:
> > > John
> > >
> > > I think you are rught bit I have the extra 512,
> > > if I install it into A2 will it hurt?
> >
> > It depends what you push it in with, or if anything sensitive gets
> > caught in the slot....
> >
> > Seriously though, I swear people think that some of us here have
> > nothing better to do than run around after them answering simple
> > questions that, with very little time, they could answer
> > themsleves. Open your browser, then cut'n paste (or copy) the below
> > URL into the address field and hit <Enter>:
> > <http://dlsvr03.asus.com/pub/ASUS/mb/socket775/P5SD2-X/E2026_P5SD2-X.pdf>
> >
> > You should find the information you require there. (Hint: The
> > answer you need is on page 28. I'm not doing everything for you,
> > read it. In fact, save it or print it out.)
> >
> > FYI I typed "P5SD2-X download" into Google and found the manual
> > within 20 seconds. Longer than it took me to write this post. This
> > took several minutes of my precious life that I'm never going to
> > get back. When I'm dying I'll probably look back on this with
> > regret, wishing I had these few minutes back again....
> >
> > <sigh>
> >
>
> The manual says, for optimum performance A1 + A2 = B1 + B2. If you
> violate that rule, by using an unbalanced RAM configuration, the
> board would run in single channel mode. That means a reduction in
> memory bandwidth. If it was my board, I'd use 2x1GB in A1 and B1, and I'd
> leave the 512MB
> stick in my desk drawer.
Damn cheap'n nasty SiS chipsets. I've just checked the manual <gasp> for my
new mobo and it says that... Errrr, hang on, I'll quote:
"You may install varying memory sizes in challel A and channel B. The system
then maps the total size of the smaller sized channel for dual channel
configuration. Any excess memory from the larger sized channel is then
mapped for single channel operation."
>>>
>> The manual says, for optimum performance A1 + A2 = B1 + B2. If you
>> violate that rule, by using an unbalanced RAM configuration, the
>> board would run in single channel mode. That means a reduction in
>> memory bandwidth. If it was my board, I'd use 2x1GB in A1 and B1, and I'd
>> leave the 512MB
>> stick in my desk drawer.
>
> Damn cheap'n nasty SiS chipsets. I've just checked the manual <gasp> for my
> new mobo and it says that... Errrr, hang on, I'll quote:
>
> "You may install varying memory sizes in challel A and channel B. The system
> then maps the total size of the smaller sized channel for dual channel
> configuration. Any excess memory from the larger sized channel is then
> mapped for single channel operation."
>
> Sounds like you *can* eat your cake and have it.
>
> Intel P35 Northbridge.
*******
The system memory controller supports three memory organization modes, Single
Channel, Dual Channel Symmetric, and Dual Channel Asymmetric.
Single Channel Mode
In this mode, all memory cycles are directed to a single channel. Single channel mode
is used when either Channel A or Channel B DIMMs are populated in any order, but
not both.
Dual Channel Symmetric Mode
This mode provides maximum performance on real applications. Addresses are pingponged
between the channels after each cache line (64 byte boundary). If there are
two requests, and the second request is to an address on the opposite channel from
the first, that request can be sent before data from the first request has returned. If
two consecutive cache lines are requested, both may be retrieved simultaneously,
since they are ensured to be on opposite channels.
Dual channel symmetric mode is used when both Channel A and Channel B DIMMs are
populated in any order with the total amount of memory in each channel being the
same, but the DRAM device technology and width may vary from one channel to the
other.
Dual Channel Asymmetric Mode with Intel Flex Memory Mode Enabled
This mode trades performance for system design flexibility. Unlike the previous mode,
addresses start in channel 0 and stay there until the end of the highest rank in
channel 0, and then addresses continue from the bottom of channel 1 to the top.
Normal applications are unlikely to make requests that alternate between addresses
that are on opposite channels with this memory organization; so, in most cases,
bandwidth will be limited to that of a single channel.
Dual channel asymmetric mode is used when both Channel A and Channel B DIMMs
are populated in any order with the total amount of memory in each channel being
different.
*******
That doesn't sound like an exact match for your manual's description. That still
sounds like an "A1 + A2 = B1 + B2 for dual channel" type chipset.
If you want to test it on your board, there is a way to do that. I modified
memtest86+, to test an nforce2 config consisting of 3x512MB, and you could
do the same for your P35, if you have an odd assortment of memory. The code
I added is specific to the amount of RAM, so the code has to be modified for
the test configuration. (I didn't waste time adding code to automate the
setup.)
Somewhere on the interweb "Paul" typed:
> ~misfit~ wrote:
>
> > > >
> > > The manual says, for optimum performance A1 + A2 = B1 + B2. If you
> > > violate that rule, by using an unbalanced RAM configuration, the
> > > board would run in single channel mode. That means a reduction in
> > > memory bandwidth. If it was my board, I'd use 2x1GB in A1 and B1,
> > > and I'd leave the 512MB
> > > stick in my desk drawer.
> >
> > Damn cheap'n nasty SiS chipsets. I've just checked the manual
> > <gasp> for my new mobo and it says that... Errrr, hang on, I'll
> > quote: "You may install varying memory sizes in challel A and channel B.
> > The system then maps the total size of the smaller sized channel
> > for dual channel configuration. Any excess memory from the larger
> > sized channel is then mapped for single channel operation."
> >
> > Sounds like you *can* eat your cake and have it.
> >
> > Intel P35 Northbridge.
>
> From the P35 datasheet (31696602.pdf page 352):
>
> http://www.intel.com/design/chipsets...hts/316966.htm
>
> *******
> The system memory controller supports three memory organization
> modes, Single Channel, Dual Channel Symmetric, and Dual Channel
> Asymmetric.
>
> Single Channel Mode
>
> In this mode, all memory cycles are directed to a single channel.
> Single channel mode is used when either Channel A or Channel B DIMMs
> are populated in any order, but not both.
>
> Dual Channel Symmetric Mode
>
> This mode provides maximum performance on real applications.
> Addresses are pingponged between the channels after each cache line
> (64 byte boundary). If there are two requests, and the second request is
> to an address on the opposite
> channel from the first, that request can be sent before data from the
> first
> request has returned. If two consecutive cache lines are requested,
> both may be retrieved simultaneously, since they are ensured to be on
> opposite channels.
>
> Dual channel symmetric mode is used when both Channel A and Channel B
> DIMMs are populated in any order with the total amount of memory in
> each channel being the same, but the DRAM device technology and width may
> vary from one
> channel to the other.
>
> Dual Channel Asymmetric Mode with Intel Flex Memory Mode Enabled
>
> This mode trades performance for system design flexibility. Unlike
> the previous mode, addresses start in channel 0 and stay there until
> the end of the highest rank in channel 0, and then addresses continue
> from the bottom of channel 1 to the top. Normal applications are unlikely
> to make requests that alternate
> between addresses that are on opposite channels with this memory
> organization; so, in most cases, bandwidth will be limited to that of
> a single channel.
> Dual channel asymmetric mode is used when both Channel A and Channel
> B DIMMs are populated in any order with the total amount of memory in each
> channel being different.
> *******
>
> That doesn't sound like an exact match for your manual's description.
> That still sounds like an "A1 + A2 = B1 + B2 for dual channel" type
> chipset.
> If you want to test it on your board, there is a way to do that. I
> modified memtest86+, to test an nforce2 config consisting of 3x512MB,
> and you could do the same for your P35, if you have an odd assortment of
> memory.
> The code I added is specific to the amount of RAM, so the code has to be
> modified for the test configuration. (I didn't waste time adding code to
> automate
> the setup.)
>
> http://groups.google.ca/group/alt.co...e23db56f02cbf2
Hmmm, interesting. However, this is my first DDR2 board and I only have 2 x
1GB modules so am unable to test.
Paul wrote:
> ~misfit~ wrote:
>
>>>>
>>> The manual says, for optimum performance A1 + A2 = B1 + B2. If you
>>> violate that rule, by using an unbalanced RAM configuration, the
>>> board would run in single channel mode. That means a reduction in
>>> memory bandwidth. If it was my board, I'd use 2x1GB in A1 and B1,
>>> and I'd leave the 512MB
>>> stick in my desk drawer.
>>
>> Damn cheap'n nasty SiS chipsets. I've just checked the manual <gasp>
>> for my new mobo and it says that... Errrr, hang on, I'll quote:
>>
>> "You may install varying memory sizes in challel A and channel B.
>> The system then maps the total size of the smaller sized channel for
>> dual channel configuration. Any excess memory from the larger sized
>> channel is then mapped for single channel operation."
>>
>> Sounds like you *can* eat your cake and have it.
>>
>> Intel P35 Northbridge.
>
> From the P35 datasheet (31696602.pdf page 352):
>
> http://www.intel.com/design/chipsets...hts/316966.htm
>
> *******
> The system memory controller supports three memory organization
> modes, Single Channel, Dual Channel Symmetric, and Dual Channel
> Asymmetric.
>
> Single Channel Mode
>
> In this mode, all memory cycles are directed to a single channel.
> Single channel mode is used when either Channel A or Channel B DIMMs
> are populated in any order, but not both.
>
> Dual Channel Symmetric Mode
>
> This mode provides maximum performance on real applications.
> Addresses are pingponged between the channels after each cache line
> (64 byte boundary). If there are two requests, and the second request is
> to an address on the opposite
> channel from the first, that request can be sent before data from the
> first
> request has returned. If two consecutive cache lines are requested,
> both may be retrieved simultaneously, since they are ensured to be on
> opposite channels.
>
> Dual channel symmetric mode is used when both Channel A and Channel B
> DIMMs are populated in any order with the total amount of memory in
> each channel being the same, but the DRAM device technology and width may
> vary from one
> channel to the other.
>
> Dual Channel Asymmetric Mode with Intel Flex Memory Mode Enabled
>
> This mode trades performance for system design flexibility. Unlike
> the previous mode, addresses start in channel 0 and stay there until
> the end of the highest rank in channel 0, and then addresses continue
> from the bottom of channel 1 to the top. Normal applications are unlikely
> to make requests that alternate
> between addresses that are on opposite channels with this memory
> organization; so, in most cases, bandwidth will be limited to that of
> a single channel.
> Dual channel asymmetric mode is used when both Channel A and Channel
> B DIMMs are populated in any order with the total amount of memory in each
> channel being different.
> *******
>
> That doesn't sound like an exact match for your manual's description.
> That still sounds like an "A1 + A2 = B1 + B2 for dual channel" type
> chipset.
> If you want to test it on your board, there is a way to do that. I
> modified memtest86+, to test an nforce2 config consisting of 3x512MB,
> and you could do the same for your P35, if you have an odd assortment of
> memory.
> The code I added is specific to the amount of RAM, so the code has to be
> modified for the test configuration. (I didn't waste time adding code to
> automate
> the setup.)
>
> http://groups.google.ca/group/alt.co...e23db56f02cbf2
>
> Paul
I thought I replied to this already but I don't see it...
I don't have any spare DDR2 RAM, all I have is installed, 2 x 1GB modules.
Maybe it's something Asus have done to the P35? On the box it says "Asus
Super Memspeed Technology enhances memory speed by up to 75%"
--
TTFN,
RAM Placement 
Linear Mode
