memory warning on ASUS board

[Osiris]

Sandra 2007 gives me this warning:


Warning W2523 - The memory bus speed exceeds the module speed rating.
While most memory will operate at slightly higher speeds, this is not
recommended. Consider buying higher rated memory.

Fix: If the memory bus speed always equals FSB for your system, reduce
FSB speed. If the system allows you to run the memory bus speed at AGP
bus speed or a lower speed, set it to use the lower speed.
Alternatively, if you happen to have CAS2 memory, you can set it for
CAS3 if the other parameters are within range.


Some data Sandra2007 reports (it DOES give you EVERYthing, doesn't it
?)

Front Side Bus Speed : 2x 133MHz (266MHz data rate)
Maximum FSB Speed / Max Memory Speed : 2x 200MHz / 2x 200MHz

Logical/Chipset 1 Memory Banks
Bank 0 : 256MB DDR-SDRAM 2.5-3-2-7 2CMD
Bank 1 : 256MB DDR-SDRAM 2.5-3-2-7 2CMD
Bank Interleave : 4-way
Speed : 2x 199MHz (398MHz data rate)
Multiplier : 3/2x
Width : 64-bit
Memory Controller in Processor : No
Power Save Mode : No
Fixed Hole Present : No


Memory Module 1
Manufacturer : Kingston
Model : K
Serial Number : 8A03873C
Type : 512MB DDR-SDRAM
Technology : 16x(32Mx8)
Speed : PC2700U 2.5-3-3-7
Date of Manufacture : Thursday, 24 June, 2004
Set Timing @ 167MHz : 2.5-3-3-7
Set Timing @ 133MHz : 2.0-2-2-6


which one is the memory bus speed ? 2x199 ?
Is the warning about the difference between the 2x199 and the 2x133
FSB ?
SHould I set the FSB speed higher in the BIOS ?
or do something about the Muliplier (3/2x) ?

 

[Mike Walsh]

Your memory is PC2700 = 333 Mhz = 2x 167 Mhz. Your memory controller is running at 2x 199 Mhz (nominally 2x 200 Mhz); you need to change the multiplier so it runs at a maximum of 2x 167 Mhz. Since you are overclocked by only 20% when running at 200 Mhz instead of 167 Mhz you might be able to run with no errors with your current settings. It depends on whether you are more interested in speed or stability.

 

[Osiris]

Your memory is PC2700 = 333 Mhz = 2x 167 Mhz. Your memory controller is running at 2x 199 Mhz (nominally 2x 200 Mhz); you need to change the multiplier so it runs at a maximum of 2x 167 Mhz. Since you are overclocked by only 20% when running at 200 Mhz instead of 167 Mhz you might be able to run with no errors with your current settings. It depends on whether you are more interested in speed or stability.

I increades CPU (AMD XP 2500+) frequency from 1466 to 1833 MHz.
(1466 seems to be underclocked, someone tells me)
And set the FSB to 166/33
Seems to work ok... CPU temp reported 52. a few degrees more than
usual

 

[kony]

On Mon, 24 Jul 2006 11:25:00 -0400, Mike Walsh

It depends on whether you are more interested in speed or stability.

Since it's a socket A platform, he wouldn't even get much
speed (performance) increase overclocking to an asynchronous
+33MHz memory bus.

If he were looking to overclock just a little, better to
leave the memory at the 166 (which actually means
synchronous to the FSB, using same clock rate), and then
raise the FSB by a small %... which would raise the memory
bus by a small percent too... but then the issue of possible
instability surfaces again, though less the less it's
overclocked.

 

[Paul]

running at 2x 199 Mhz (nominally 2x 200 Mhz); you need to change the
multiplier so it runs at a maximum of 2x 167 Mhz. Since you are
overclocked by only 20% when running at 200 Mhz instead of 167 Mhz you
might be able to run with no errors with your current settings. It depends
on whether you are more interested in speed or stability.

I increades CPU (AMD XP 2500+) frequency from 1466 to 1833 MHz.
(1466 seems to be underclocked, someone tells me)
And set the FSB to 166/33
Seems to work ok... CPU temp reported 52. a few degrees more than
usual

There is a "Memory Frequency" setting in the A7V600-X BIOS.
Set it to [333] to match your memory. Then Sandra will
have nothing to complain about.

Paul