PDA

View Full Version : Tyan board-Opterons-Memory Which?


arnie
June 4th 04, 04:11 AM
From the Tyan site:
Memory
. 128-bit DDR memory bus
. Six 184-pin 2.5-Volt DDR DIMM sockets
- four controlled by CPU1 and two on CPU2
. Supports up to 12GB of Registered DDR
. Supports ECC type memory modules
. Supports PC3200 / 2700 / 2100 / 1600 DDR


When it says it "supports" PC3200 / 2700 / 2100 / 1600
does that mean that all it needs is 1600, and you wont get any real benefit
from the higher speed ram
or does it mean that you will get more performance out of the higher speed
ram.

If I have the Opteron 244 (1.8mhz) which Ram should I have to get the best
performance out of the Processor.

General Schvantzkoph
June 5th 04, 02:03 AM
On Fri, 04 Jun 2004 03:11:25 +0000, arnie wrote:

> From the Tyan site:
> Memory
> . 128-bit DDR memory bus
> . Six 184-pin 2.5-Volt DDR DIMM sockets
> - four controlled by CPU1 and two on CPU2
> . Supports up to 12GB of Registered DDR
> . Supports ECC type memory modules
> . Supports PC3200 / 2700 / 2100 / 1600 DDR
>
>
> When it says it "supports" PC3200 / 2700 / 2100 / 1600
> does that mean that all it needs is 1600, and you wont get any real benefit
> from the higher speed ram
> or does it mean that you will get more performance out of the higher speed
> ram.
>
> If I have the Opteron 244 (1.8mhz) which Ram should I have to get the best
> performance out of the Processor.

You will see a real speed benefit from the higher speed RAM. Check the AMD
site to see what speeds the 244 support, it will handle at least PC2700
and probably PC3200.

Chip
June 8th 04, 06:47 AM
arnie wrote:
>
> If I have the Opteron 244 (1.8mhz) which Ram should I have to get the
> best performance out of the Processor.

To get the best performance from your memory and CPU interface, when using
the 1.8 GHz processor, you should get either DDR 266 (2nd choice) or DDR 400
(1st choice) memory. The DDR 333 memory will be out of phase with the CPU
clock. The same is true for CPUs at 2.2 GHz. CPUs at 2.1 GHz support DDR
400.

A CPU at 2.0 GHz will support all memory speeds through DDR 400. AFAIK, the
AMD64 processors do not presently support DDR2 at any speed grade, but
hopefully this will change soon.