dual channel ram

In article ,
says...
hi
seems I started something here and also (encouragingly) seems noone really
understands this - whatever website you look at comes up with something
slightly different and I have yet to have any response from
msi/corsair/geil/kingston
for what it's worth - it seems to be (as strontium says) an increase in
bandwidth as you can only use ddr400 with a fsb of 800 mhz and the advantage
of the various twin packs is they are packed as identical - ohhhhhhh my head
hurts!!
enough already - I think I'll just take a pin and stick it in
thnx phil

"Strontium" wrote in message
...
-
Larc stood up at show-n-tell, in
,
and said:

On Thu, 4 Sep 2003 06:06:40 -0500, Strontium pondered exceedingly,
then took quill in hand and carefully composed...

What you are referring to are actually Bank A, slot 0...Bank A,
slot 1 and Bank B, slot 0...Bank B, slot 1. For dual channel
operation, you populate either Bank A0 and Bank B0 or Bank A1 and
Bank B1, with identical DIMMS (each bank consists of two channels,
ie slots, 0 and 1). If you populate Bank A0 and Bank A1, with
identical DIMMS, your memory is in single channel mode. However,
it's still running at it's stated speed. I've been wondering about
the difference, performance-wise, between the two modes. And, have
not seen any difference personally. I would imagine it would have
something to do with multitasking applications. But, I've yet to
read any articles. Might do that, later today.

I've not had much luck finding anything that completely explains the
differences between using 1GB of RAM in one channel vs 512MB in each
channel. Which is better and why? I can't help thinking you'd need
to double your RAM to get the full benefit of hyperthreading.

When you learn the answer, please come back and educate us!

From what I have gleened, I'm thinking the whole 'dual mode' vs. 'single
mode' is a lot like AGP 4X vs AGP 8X. It's a bandwidth issue. While the
speed of the memory does not change, the transfer rate between the CPU and
the memory increases going to dual channel mode. I could be wrong. But,
I
think that's the gist of it. I've been googling, around, and have not
really found anything either on it but hype.

I started out with 512MB DDR400, running in dual mode on my new

This list is from the MSI website and details all the Qualified Vendors
or DDR400 Memory for your particular board (Sorry it's a bit long)

Memory Brand / Model Size Business Winstone 2001
Infineon (HYS64D16301GU-5-B)
HYB25D256160BT-5
128MB OK
Nanya (NT128D64SH4B1G-5)
NT5DS16M16BT-5
128MB OK
OCZ (PN- OCZ400256EL )
PN- OCZ400256EL
256MB OK
Infineon (HYS64D32300GU-5-B)
HYB25D256800BT-5
256MB OK
Micron (MT8VDDT3264AG-40BC4)
MT46V32M8TG-5B C
256MB OK
Winbond (W9425GCDB-5)
W942508CH-5 256MB OK
Kingston KVR400X64C25/256
W942508BH-5 (Winbond) 256MB OK
SEC (M368L3223DTM-CC4)
K4H560838D-TCC4 256MB OK
SEC (M368L3223ETM-CCC)
K4H560838E-TCCC
256MB OK
CORSAIR (CMX256A-3200LL)
XMS3205 V1.2 256MB OK
Apacer (73.85397.460)
K4H560838D-TCC4 (SEC) 256MB OK
GeIL (GL2563200U)
GL3LC32G88TG-5A 256MB OK
GeIL (GE2563200B) 256MB OK
Hynix (HYMD232646A8J-D43)
HY5DU56822AT-D43 256MB OK
Hynix (HYMD232646B8J-D43)
HY5DU56822BT-D43 256MB OK
PSC (AL5D8A53TK1-5B)
A2S56D30ATP-5 256MB OK
PSC (AL5D8B53T-5B1K)
A2S56D30BTP-5
256MB OK
Nanya (NT256D64S88B1G-5T)
NT5DS32M8BT-5T 256MB OK
A-DATA (MD0M05F3G31JB1EAZ)
V58C2256804SAT5 (Mosel) 256MB OK
A-DATA (MD0WB5F3G31 JD1EZZ)
W942508CH-5 (Winbobd) 256MB OK
ATP (AG32L72T8SQC4S)
K4H560838D-TCC4 (SEC) 256MB OK
Apacer (77.10636.115)
HYB25D256800BT-6 B (Infineon) 256MB OK
Apacer (77.10639.535)
A2S56D30ATP (PSC) 256MB OK
Transcend (TS32MLD64V4F3)
K4H560838D-TCCC (SEC) 256MB OK
TwinMOS (M2S9I08AFAPS9F0811A-T)
A2S56D30ATP3079LA05 (PSC) 256MB OK
TwinMOS (M2G9I08AFATT9F0811DDT)
TwinMOS TMD7608F8E50B 256MB OK
LEGEND (L3264D37-643HDC9B)
HY5DU56822BT-D43 (Hynix) 256MB OK
Siemens (SDU03264B4B31MT-50)
MT46V32M8TG-5B C (Micron) 256MB OK
OCZ (OCZ400256ELDCPE-K) 256MB OK
Infineon (HYS64D32300HU-5-C)
HYB25D256800CE-5 C
256MB OK
GeIL (GE5123200B) 512MB OK
CORSAIR (CMX512-3500C2PT)
XMS3502 V1.1 512MB OK
Micron (MT16VDDT6464AG-40BC4)
MT46V32M8TG-5B C 512MB OK
Nanya (NT512D64S8HB1G-5T)
NT5DS32M8BT-5T 512MB OK
Winbond (W9451GCDB-5)
W942508CH-5 512MB OK
Apacer (77.10736.583)
W942508BH-5 (Winbond) 512MB OK
Apacer (77.10736.554)
HY5DU56822BT-D43 (Hynix) 512MB OK
Apacer (77.10739.534)
A2S56D30ATP (PSC) 512MB OK
Apacer (77.10736.464)
K4H560838D-TCCC (SEC) 512MB OK
Kingston (KVR400X64C25/512)
W942508BH-5 (Winbond) 512MB OK
KingMax (MPXC22D-38KT3R) 512MB OK
SEC (M368L6423DTM-CC4)
K4H560838D-TCC4 512MB OK
SEC (M368L6423ETM-CCC)
K4H560838E-TCCC 512MB OK
Hynix (HYMD264646A8J-D43)
HY5DU56822AT-D43 512MB OK
Hynix (HYMD264646B8J-D43)
HY5DU56822BT-D43 512MB OK
ATP (AG64L64T8SQC4S)
K4H560838D-TCC4 (SEC) 512MB OK
PSC (AL6D8A53TK1-5B)
A2S56D30ATP-5 512MB OK
PSC (AL6D8B53T-5B1K)
A2S56D30BTP-5
512MB OK
Transcend (TS64MLD64V4F3)
K4H560838D-TCCC (SEC) 512MB OK
TwinMOS (M2G9J16AJATT9F0811DDT)
TMD7608F8E50B 512MB OK
Crucial/Micron (BG111DB.FB)
MT46V32M8TG-5B C (Micron) 512MB OK
Siemens (SDU06464H1B22IN-50)
HYB25D256800BT-5 B (Infineon) 512MB OK
Siemens (SDU06464H1B32MT-50)
MT46V32M8TG-5B C (Micron) 512MB OK
elixir (M2U51264DS8HB3G-5T)
N2DS25680BT-5T (elixir) 512MB OK
Infineon (HYS64D64320HU-5-C)
HYB25D256800CE-5 C 512MB


Jim
--
------------------------
Seti@home team - SetiUK
The Official UK Team
------------------------

hi
the curious thing about this is, that this list, which is off msi's website
I think, gives for example 5 compatible Kingston dimm's, whereas Kingston's
own site lists 20 as being OK!!
it also states "k2" kit parts as being required for dual channel mode
I think I'll just stick a pin in
bi phil

"Jim Stevenson" wrote in message
...
In article ,
says...
hi
seems I started something here and also (encouragingly) seems noone
really
understands this - whatever website you look at comes up with something
slightly different and I have yet to have any response from
msi/corsair/geil/kingston
for what it's worth - it seems to be (as strontium says) an increase in
bandwidth as you can only use ddr400 with a fsb of 800 mhz and the
advantage
of the various twin packs is they are packed as identical - ohhhhhhh my
head
hurts!!
enough already - I think I'll just take a pin and stick it in
thnx phil

"Strontium" wrote in message
...
-
Larc stood up at show-n-tell, in
,
and said:

On Thu, 4 Sep 2003 06:06:40 -0500, Strontium pondered exceedingly,
then took quill in hand and carefully composed...

What you are referring to are actually Bank A, slot 0...Bank A,
slot 1 and Bank B, slot 0...Bank B, slot 1. For dual channel
operation, you populate either Bank A0 and Bank B0 or Bank A1 and
Bank B1, with identical DIMMS (each bank consists of two channels,
ie slots, 0 and 1). If you populate Bank A0 and Bank A1, with
identical DIMMS, your memory is in single channel mode. However,
it's still running at it's stated speed. I've been wondering
about
the difference, performance-wise, between the two modes. And, have
not seen any difference personally. I would imagine it would have
something to do with multitasking applications. But, I've yet to
read any articles. Might do that, later today.

I've not had much luck finding anything that completely explains the
differences between using 1GB of RAM in one channel vs 512MB in each
channel. Which is better and why? I can't help thinking you'd need
to double your RAM to get the full benefit of hyperthreading.

When you learn the answer, please come back and educate us!

From what I have gleened, I'm thinking the whole 'dual mode' vs.
'single
mode' is a lot like AGP 4X vs AGP 8X. It's a bandwidth issue. While
the
speed of the memory does not change, the transfer rate between the CPU
and
the memory increases going to dual channel mode. I could be wrong.
But,
I
think that's the gist of it. I've been googling, around, and have not
really found anything either on it but hype.

I started out with 512MB DDR400, running in dual mode on my new

This list is from the MSI website and details all the Qualified Vendors
or DDR400 Memory for your particular board (Sorry it's a bit long)

Memory Brand / Model Size Business Winstone 2001
Infineon (HYS64D16301GU-5-B)
HYB25D256160BT-5
128MB OK
Nanya (NT128D64SH4B1G-5)
NT5DS16M16BT-5
128MB OK
OCZ (PN- OCZ400256EL )
PN- OCZ400256EL
256MB OK
Infineon (HYS64D32300GU-5-B)
HYB25D256800BT-5
256MB OK
Micron (MT8VDDT3264AG-40BC4)
MT46V32M8TG-5B C
256MB OK
Winbond (W9425GCDB-5)
W942508CH-5 256MB OK
Kingston KVR400X64C25/256
W942508BH-5 (Winbond) 256MB OK
SEC (M368L3223DTM-CC4)
K4H560838D-TCC4 256MB OK
SEC (M368L3223ETM-CCC)
K4H560838E-TCCC
256MB OK
CORSAIR (CMX256A-3200LL)
XMS3205 V1.2 256MB OK
Apacer (73.85397.460)
K4H560838D-TCC4 (SEC) 256MB OK
GeIL (GL2563200U)
GL3LC32G88TG-5A 256MB OK
GeIL (GE2563200B) 256MB OK
Hynix (HYMD232646A8J-D43)
HY5DU56822AT-D43 256MB OK
Hynix (HYMD232646B8J-D43)
HY5DU56822BT-D43 256MB OK
PSC (AL5D8A53TK1-5B)
A2S56D30ATP-5 256MB OK
PSC (AL5D8B53T-5B1K)
A2S56D30BTP-5
256MB OK
Nanya (NT256D64S88B1G-5T)
NT5DS32M8BT-5T 256MB OK
A-DATA (MD0M05F3G31JB1EAZ)
V58C2256804SAT5 (Mosel) 256MB OK
A-DATA (MD0WB5F3G31 JD1EZZ)
W942508CH-5 (Winbobd) 256MB OK
ATP (AG32L72T8SQC4S)
K4H560838D-TCC4 (SEC) 256MB OK
Apacer (77.10636.115)
HYB25D256800BT-6 B (Infineon) 256MB OK
Apacer (77.10639.535)
A2S56D30ATP (PSC) 256MB OK
Transcend (TS32MLD64V4F3)
K4H560838D-TCCC (SEC) 256MB OK
TwinMOS (M2S9I08AFAPS9F0811A-T)
A2S56D30ATP3079LA05 (PSC) 256MB OK
TwinMOS (M2G9I08AFATT9F0811DDT)
TwinMOS TMD7608F8E50B 256MB OK
LEGEND (L3264D37-643HDC9B)
HY5DU56822BT-D43 (Hynix) 256MB OK
Siemens (SDU03264B4B31MT-50)
MT46V32M8TG-5B C (Micron) 256MB OK
OCZ (OCZ400256ELDCPE-K) 256MB OK
Infineon (HYS64D32300HU-5-C)
HYB25D256800CE-5 C
256MB OK
GeIL (GE5123200B) 512MB OK
CORSAIR (CMX512-3500C2PT)
XMS3502 V1.1 512MB OK
Micron (MT16VDDT6464AG-40BC4)
MT46V32M8TG-5B C 512MB OK
Nanya (NT512D64S8HB1G-5T)
NT5DS32M8BT-5T 512MB OK
Winbond (W9451GCDB-5)
W942508CH-5 512MB OK
Apacer (77.10736.583)
W942508BH-5 (Winbond) 512MB OK
Apacer (77.10736.554)
HY5DU56822BT-D43 (Hynix) 512MB OK
Apacer (77.10739.534)
A2S56D30ATP (PSC) 512MB OK
Apacer (77.10736.464)
K4H560838D-TCCC (SEC) 512MB OK
Kingston (KVR400X64C25/512)
W942508BH-5 (Winbond) 512MB OK
KingMax (MPXC22D-38KT3R) 512MB OK
SEC (M368L6423DTM-CC4)
K4H560838D-TCC4 512MB OK
SEC (M368L6423ETM-CCC)
K4H560838E-TCCC 512MB OK
Hynix (HYMD264646A8J-D43)
HY5DU56822AT-D43 512MB OK
Hynix (HYMD264646B8J-D43)
HY5DU56822BT-D43 512MB OK
ATP (AG64L64T8SQC4S)
K4H560838D-TCC4 (SEC) 512MB OK
PSC (AL6D8A53TK1-5B)
A2S56D30ATP-5 512MB OK
PSC (AL6D8B53T-5B1K)
A2S56D30BTP-5
512MB OK
Transcend (TS64MLD64V4F3)
K4H560838D-TCCC (SEC) 512MB OK
TwinMOS (M2G9J16AJATT9F0811DDT)
TMD7608F8E50B 512MB OK
Crucial/Micron (BG111DB.FB)
MT46V32M8TG-5B C (Micron) 512MB OK
Siemens (SDU06464H1B22IN-50)
HYB25D256800BT-5 B (Infineon) 512MB OK
Siemens (SDU06464H1B32MT-50)
MT46V32M8TG-5B C (Micron) 512MB OK
elixir (M2U51264DS8HB3G-5T)
N2DS25680BT-5T (elixir) 512MB OK
Infineon (HYS64D64320HU-5-C)
HYB25D256800CE-5 C 512MB


Jim
--
------------------------
Seti@home team - SetiUK
The Official UK Team
------------------------