RDRAM Setting

[Guest]

I am using PC800 Rambus (2x64) in my System with Asus P4T. I am not familiar with Rambus's system whatsoever. I wanted to know if different size memory could be used in the same system (ie 2x64 and 2x256 sticks) and how about configuration?
Now my configuration :
RIMMA 1 ---> 256MB RDRAM Samsung
RIMMA 2 ---> 64MB RDRAM Kingston
RIMMB 1 ---> 256MB RDRAM Samsung
RIMMB 2 ---> 64MB RDRAM Kingston

Thanks in advance

 

[Toejam31]

Yes, different size modules can used, but they must be installed in pairs.

Your configuration looks correct. The modules must be installed "staggered", and the A & B channels must be identical.

Take a look at the mainboard manual, page 23:

<A HREF="http://ftp://ftp.asus.com/pub/ASUS/mb/sock478/p4t-e/p4te-101.pdf" target="_new">http://ftp://ftp.asus.com/pub/ASUS/mb/sock478/p4t-e/p4te-101.pdf</A>

If you don't want a direct link to the manual, go here:

<A HREF="http://www.asus.com/download/manual/mb-man-other.htm" target="_new">http://www.asus.com/download/manual/mb-man-other.htm</A>

I'd stick with PC800, since that's what you've already got.

Toejam31

<font color=red>My Rig:</font color=red> <A HREF="http://www.anandtech.com/mysystemrig.html?rigid=6847" target="_new">http://www.anandtech.com/mysystemrig.html?rigid=6847</A>
______________________________________________________________

<font color=purple>"Procrastination on your part does not constitute an emergency on my part."</font color=purple>

 

[bum_jcrules]

What Toejam31 is correct. You will need at least two new sticks of RDRAM.

You will want to make sure you get PC800 for your new sticks. If you go with a slower RDRAM stick lick PC700 of PC600 it will make the MCH scale down to the lowest common denominator. Hence your existing PC800 will be throttled down to the slower interface. Just one thing to make sure of. Most likely you are already looking at PC800, but make sure that is the speed you buy.

<b>"The events of my life are quite inconsequential.." - Dr. Evil</b> :lol:

 

[Hades]

I had a cicero machine in the shop today, and the RAM config was like this

RIMM1 - 64MB
RIMM2 - 64MB

RIMM3 - C-RIMM
RIMM4 - C-RIMM

I thought this wasnt possible. I tried switching the 64MB stick in RIMM2 to RIMM3 and placing the C-RIMM in RIMM2, but i got post codes (i tried reseating it about 4 times), and had to switch it back. Is this normal? Is it just a quirky board? Unfortuneately i didnt have the manual, nor the time to find out what board it was, so i cant tell from the documentation. Hope someone may have som insight.

 

[Toejam31]

It's not a quirk ... it's very possible. I installed a Socket 478 D850MV Intel board a few weeks ago that was configured in this manner. Bank 0 <i>had</i> to be filled with the RIMMs before Bank 1, and any C-RIMMs went in Bank 1. This means that the first channel is RIMM1 & RIMM3, and the second is RIMM2 & RIMM4. That was the only way the channels could be identical on this board.

Check out page 23 of this <A HREF="http://ftp://download.intel.com/design/motherbd/mv/A6514501.pdf" target="_new">.pdf</A> and you'll see what I mean.

It kinda threw me for a loop, too .. even though I had the manual. I thought it was a misprint ... but no, it was correct.

Toejam31

<font color=red>My Rig:</font color=red> <A HREF="http://www.anandtech.com/mysystemrig.html?rigid=6847" target="_new"><font color=green>Toejam31's Tantalizing Tantric Toy</font color=green></A>
<font color=red>Second Rig:</font color=red> <A HREF="http://www.anandtech.com/mysystemrig.html?rigid=15942" target="_new"><font color=green>Toey's Dynamite DDR Duron</font color=green></A>
____________________________________________________________

<font color=purple>"Procrastination on your part does not constitute an emergency on my part."</font color=purple>