BH6 and BX6 r2 doesn't detect 256 meg DIMM

[k3]

Hi,

Is there a reason why both of these boards do not detect a stick of 256 meg dimm? The manual claims it supports 256 meg sticks and they both have the latest version of the bios. The stick is PC133 with 8 chips on it.

Thanks

 

[Max Attar Feingold]

On Tue, 15 Jul 2003 01:28:53 -0400, "k3" said:

Hi,

Is there a reason why both of these boards do not detect a stick of 256 meg dimm? The manual claims it supports 256 meg sticks and they both have the latest version of the bios. The stick is PC133 with 8 chips on it.

Search google for information on high-density / low-density PC133 DIMMs.

Max Attar Feingold
maf6 at cornell dot edu
http://almonaster.sourceforge.net/mfeingol/

Not speaking for my employer

 

[Rick (archive)]

"k3" wrote:

Hi,

Is there a reason why both of these boards do not detect a stick of 256 meg dimm? The manual claims it supports 256 meg sticks and they both have the latest version of the bios. The stick is PC133 with 8 chips on it.

^^^^^^^^^^^^^ There's your problem. Get a double-sided dimm. BX boards are limited to 128MB per bank, they require 256MB dimms that use "low-density" (16MB/128Mbit) chips, organized into two 128MB banks. Here are a few that will definitely work:

http://www.crucial.com/store/PartSpecs.asp?imodule=CT32M64S4D7E

http://shop4.outpost.com/product/3099389

RickW

 

[tf]

Only partly true.

You CAN use 256 low density RAM in each bank. Doing so in 2 BH6 systems.

The critical issue is low density vs. high density PC-133 RAM. Go to the web site of Crucial, Kensington, etc. You will find low density PC-133 RAM or PC 100 RAM which will properly work.

There have been a couple of hundred posts to this NG about high density RAM.

"Rick" wrote:

"k3" wrote:

Hi,

Is there a reason why both of these boards do not detect a stick of 256 meg dimm? The manual claims it supports 256 meg sticks and they both have the latest version of the bios. The stick is PC133 with 8 chips on it.

^^^^^^^^^^^^^

There's your problem. Get a double-sided dimm. BX boards are limited to 128MB per bank, they require 256MB dimms that use "low-density" (16MB/128Mbit) chips, organized into two 128MB banks. Here are a few that will definitely work:

http://www.crucial.com/store/PartSpecs.asp?imodule=CT32M64S4D7E

http://shop4.outpost.com/product/3099389

RickW

 

[Rick (archive)]

"tf" wrote:

Only partly true.

No, completely true.

You CAN use 256 low density RAM in each bank. Doing so in 2 BH6 systems.

I didn't say otherwise. You're confusing "bank" with "slot". As I said, the BX chipset is limited to 128MB per bank, NOT per slot. A "low density" 256MB dimm combines two 128MB banks on one dimm.

RickW

The critical issue is low density vs. high density PC-133 RAM. Go to the web site of Crucial, Kensington, etc. You will find low density PC-133 RAM or PC 100 RAM which will properly work.

There have been a couple of hundred posts to this NG about high density RAM.

"Rick" wrote:

"k3" wrote:

Hi,

Is there a reason why both of these boards do not detect a stick of 256 meg
dimm? The manual claims it supports 256 meg sticks and they both have the
latest version of the bios. The stick is PC133 with 8 chips on it.

...

 

[tf]

ok. read quickly and missed "bank" vs "slot".

"Rick" wrote:

"tf" wrote:

Only partly true.

No, completely true.

You CAN use 256 low density RAM in each bank. Doing so in 2 BH6

systems.

I didn't say otherwise. You're confusing "bank" with "slot". As I said, the BX chipset is limited to 128MB per bank, NOT per slot. A "low density" 256MB dimm combines two 128MB banks on one dimm.

RickW

The critical issue is low density vs. high density PC-133 RAM. Go to the web site of Crucial, Kensington, etc. You will find low density PC-133 RAM or PC 100 RAM which will properly work.

There have been a couple of hundred posts to this NG about high density

RAM.

"Rick" wrote:

"k3" wrote:

Hi,

Is there a reason why both of these boards do not detect a stick of 256 meg
dimm? The manual claims it supports 256 meg sticks and they both have the
latest version of the bios. The stick is PC133 with 8 chips on it.

^^^^^^^^^^^^^
There's your problem. Get a double-sided dimm. BX boards are limited to 128MB per bank, they require 256MB dimms that use
"low-density" (16MB/128Mbit) chips, organized into two 128MB
banks. Here are a few that will definitely work:

http://www.crucial.com/store/PartSpecs.asp?imodule=CT32M64S4D7E

http://shop4.outpost.com/product/3099389
...