Best option/memory to get 2GB on A8N-SLI

  • Thread starter Thread starter Alex Perez
  • Start date Start date
A

Alex Perez

and still get DDR 400, decent timings with a shot at a half decent
overclock. 2 sticks of 1GB DDR or 4 sticks 512MB of DDR.

Thoughts?
 
Alex Perez aexep @hotmail.com > said:
and still get DDR 400, decent timings with a shot at a half decent
overclock. 2 sticks of 1GB DDR or 4 sticks 512MB of DDR.

Thoughts?
Click to expand...
Definitely get 2 sticks of 1GB.
 
Definitely get a 2x 1GB kit. Unless you are running one of the newer San
Diego or Venice cores, 4x 512MB sticks will force you to run 2T vs 1T
command rate, which will eat up about 15+% of your memory bandwidth right
there.

Their pricey, but I'm running 2x 1GB sticks of Crucial Ballistix DDR 500
(rated 3-4-4-10 at this speed) on my FX-55 A8N-SLI Deluxe at 2-2-2-7 1T
timings at DDR 400 speed with complete stability. Have yet to try clocking
above 200MHz, but I have no doubt I can without having to completely relax
timings to the 3-4-4-10 SPD timings. I'd really like to boost my confidence
with more in-depth learning about overclocking issues before upping HTT bus
speed.
 
Al. said:
Will be using the Athalon X2 4800, with the newer core....
Click to expand...

Then it would seem money is not an issue. Whichever modules you pick,
2x1GB is definately the way to go.
 
Corsair 1024MB 3200XL TWINX (2x512) works and it's rocks solid stable. check
asus to see if you can run these modules in 4 slots.

regards,

Ben.
 
Odin said:
Corsair 1024MB 3200XL TWINX (2x512) works and it's rocks solid stable.
check asus to see if you can run these modules in 4 slots.
Click to expand...

Hardly 2x1GB. I've got the Corsair 2048 3200C2 TwinX, which works and is
also rock solid stable. These have been on Asus list right from the start.
 
Definitely get a 2x 1GB kit. Unless you are running one of the newer San
Diego or Venice cores, 4x 512MB sticks will force you to run 2T vs 1T
command rate, which will eat up about 15+% of your memory bandwidth right
there.
Click to expand...

It's stated that Rev E chips would allow 1T command rates with four
sticks, but that has NOT been everyone's experience. Just to be safe,
it's probably best to use a 2 x 1GB kit even if one does have one of
these newer CPUs.
Their pricey, but I'm running 2x 1GB sticks of Crucial Ballistix DDR 500
(rated 3-4-4-10 at this speed) on my FX-55 A8N-SLI Deluxe at 2-2-2-7 1T
timings at DDR 400 speed with complete stability. Have yet to try clocking
above 200MHz, but I have no doubt I can without having to completely relax
timings to the 3-4-4-10 SPD timings. I'd really like to boost my confidence
with more in-depth learning about overclocking issues before upping HTT bus
speed.
Click to expand...

Ron
 
I've heard this too.

It would be nice to hear from people that have 4 x 1GB sticks running 1T
without issue and find out what it is they are using.

There is a review at
http://www.tomshardware.com/motherboard/20050721/index.html
of supposed CL 1.5 RAM and basically it states you are better off with low
latency than high clock unless you are going to seriously overclock - if
I've got it right.
 
It's stated that Rev E chips would allow 1T command rates with four
sticks, but that has NOT been everyone's experience. Just to be safe,
it's probably best to use a 2 x 1GB kit even if one does have one of
these newer CPUs.

Ron
Click to expand...

I'd want proof from someone who owns one of those processors,
and is using four double sided sticks. I don't see that
happening at DDR400. The OP will definitely be better off
with a 2 stick configuration, one stick per channel. Four
double sided sticks will run at DDR400 Command Rate 1T,
when "pigs learn to fly".

If you look at 26094.pdf (the current version still dated
Apr2005), four double sided are only supposed to work at
DDR333 Command Rate 2T. This document is so hopelessly out
of date, we have to rely on home experimenters to get the
answer.

http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/26094
..PDF

Here is the benefit of the higher DDR settings available
on Venice. Doesn't seem to do much for single core processors.
And only helps dual cores a little.

http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2469&p=1

This article shows four DIMMs needing 2T command rate at DDR400.
The memory controller is in the CPU, so it doesn't matter whether
this evaluation is done on an Ultra board or a SLI board.

http://www.anandtech.com/mb/showdoc.aspx?i=2465&p=6

"We also found that the new Rev. E chips with an updated memory
controller required 2T for 4 DS DIMMs."

That is why, two DIMMs is the way to go.

Paul
 
Back
Top