Mixed EDO/non-EDO?

Mixed EDO/non-EDO?

Post by The Zen Pag » Tue, 06 Aug 1996 04:00:00



Hi,

I'm about to invest in another 32M of RAM, in the form of 2 16M
72-pin SIMMs.  It'll be running alongside 2 8M 70ns plain-old
SIMMs;  will I still get benefits mixing EDO and non-EDO RAM?  
Should I bother?

Also, I only have 256k cache... is it worth upgrading to 512k?

Thanks for your help,
Ben

 
 
 

Mixed EDO/non-EDO?

Post by Magnus Stenma » Wed, 07 Aug 1996 04:00:00



> Hi,

> I'm about to invest in another 32M of RAM, in the form of 2 16M
> 72-pin SIMMs.  It'll be running alongside 2 8M 70ns plain-old
> SIMMs;  will I still get benefits mixing EDO and non-EDO RAM?
> Should I bother?

> Also, I only have 256k cache... is it worth upgrading to 512k?

> Thanks for your help,
> Ben

I did this. My system halted while mounting the fs.
I didnt care to investigate further and installed std
memory instead. You may have more luck.
This was on a 486 board.
/magnus

 
 
 

Mixed EDO/non-EDO?

Post by Henry Cros » Wed, 07 Aug 1996 04:00:00



> =

> > Hi,

> > I'm about to invest in another 32M of RAM, in the form of 2 16M
> > 72-pin SIMMs.  It'll be running alongside 2 8M 70ns plain-old
> > SIMMs;  will I still get benefits mixing EDO and non-EDO RAM?
> > Should I bother?

> > Also, I only have 256k cache... is it worth upgrading to 512k?

> > Thanks for your help,
> > Ben
> =
> I did this. My system halted while mounting the fs.
> I didn=B4t care to investigate further and installed std
> memory instead. You may have more luck.
> This was on a 486 board.
> /magnus

 In a related matter. I've seen parallel printer quirks/problems
using EDO memory in a 486 PCI board that didn't support it.

regards,
-- =

H.Cross

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=3D=3D

 
 
 

Mixed EDO/non-EDO?

Post by Ronald Mar » Thu, 08 Aug 1996 04:00:00


I have been told that you cannot mix the two memory types. Stick with one
or the other (and make sure your board with support the type you pick).

 
 
 

Mixed EDO/non-EDO?

Post by Michael Achenba » Wed, 14 Aug 1996 04:00:00


: I have been told that you cannot mix the two memory types. Stick with one
: or the other (and make sure your board with support the type you pick).
I've installed 2x8 MByte FPM and 2x8 MByte EDO-RAM on my Elitegroup umc8810
Motherboard, without ANY problems yet.
Look at www.heise.de, in their magazine c't, they had an article about
memory compatibility. Perhaps the article is on the net.

Michael

 
 
 

Mixed EDO/non-EDO?

Post by Garp » Thu, 15 Aug 1996 04:00:00


: I have been told that you cannot mix the two memory types. Stick with one
: or the other (and make sure your board with support the type you pick).

I've always understood that you couldn't mix EDO and non-EDO with *the
same simm bank*.

--
Garph
Don't send me your junk mail...  You won't like it...

 
 
 

Mixed EDO/non-EDO?

Post by Richard Bywat » Mon, 19 Aug 1996 04:00:00



: : I have been told that you cannot mix the two memory types. Stick with one
: : or the other (and make sure your board with support the type you pick).

: I've always understood that you couldn't mix EDO and non-EDO with *the
: same simm bank*.

That's the way I've heard it too...

Cheers.

--
+-------------------+--------------------------------------------------------+
| RICHARD BYWATER   | CURRENTLY STUDYING AT CENTRAL INSTITUTE OF TECHNOLOGY, |
| (Cert. Audio      | HERATUANGA, NZ FOR CERTIFICATE IN SOFTWARE ENGINEERING |
| Engineering and   +--------------------------------------------------------+

+-------------------+--------------------------------------------------------+

 
 
 

Mixed EDO/non-EDO?

Post by chris harshm » Tue, 20 Aug 1996 04:00:00


My understanding (and years of PC-Teching for one of the larger
chains has born this out) is that EDO and non-EDO CAN be mixed, but
the effect will be to negate the speed increase of the EDO.  That is,
if you've got a Pentium with 4 SIMM sockets (Pentiums must be
upgraded in pairs - 64-bit data bus and all), and you put two EDO
chips in first (Bank 0) and then a pair of generic 70ns beasts,
you'll get errors.  Stick the 70ns monsters in Bank 0 and the EDO in
Bank 1 and the system will run fine, just without the benefits of
EDO.  

I could be wrong about the speed benefits being sucked away.  
However, mixing the RAM types I know for a fact works.  A million
Compaq 9240s went out the door in that config.

 
 
 

1. EDO and non-EDO mix - no X?

I've got 16M of non-EDO RAM and my machine runs 2.0.13 nicely.

When I use 16M of EDO RAM, it also runs nicely.

When I use 16M of each, it freaks.  X doesn't work.  (3.1.2C)

Everything else works, but no X.  Odd.

Thoughts?  The motherboard appears to be able to handle it -- the BIOS
has a little note -- 'bank0 EDO: no' 'bank1 EDO: yes'.

Help?

Jack.

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