First, PC-6400 is sometimes sold with the following statement on the
Dual-Channel DDR2 800
DDR2 is the next generation memory technology to replace the current DDR.
With the highest speed up to 800MHz, DDR2 memory provides great performance
for 3D graphics and other memory demanding applications.
It's that "up to 800 MHz" you got to watch for. If it is stated this way, or
shown with anything other than 1.8v rating, then it can only be achieved by
overclocking the memory. It may actually be PC-5300-667.
Second, the default FSB speed of your machine may not be 400 MHz. If it's
333 MHz, then your PC-6400-800 will run at 667 MHz.
Fatal1ty IN-9 SLI is factory overclocked. It's default is 333MHz and
overclocked to 375MHz, not 400 MHz and has been reported stable up to
490MHz. But, the factory setting resets the speed on every boot back to
375MHz. This is probably the ding in WEI you are experiencing.
Third, the latency of the memory sticks should be matched. If not, WEI will
use the worst case scenario.
Last, WEI sucks as a performance indication of your machine. Get CPU-Z and
find out what your memory is really doing. http://www.cpuid.com/download/cpuz_144.zip
"CJM" <cjmnews04@xxxxxx> wrote in message
> "Mark" <jmhonzell@xxxxxx> wrote in message
> > PS. Sometimes you will find that the memory sold as 800 MHz is only
> > recognized and runs as 667 MHz unless overclocked. This can be seen in
> Again, if something is sold as PC2-6400, it should be corrected rated to
> and 800MHz. Anyone selling PC2-5300 RAM as PC2-6400 RAM on the basis of
> overclocking is breaking the law.
> However, official DDR2 RAM speeds only go upto 800MHz, so DDR2 RAM that
> a higher rating is outside the official standard - I'm not sure in this
> what SPD information is stored in these chips... is it the highest officia
> rating (PC2-6400) or its actual rating (PC2-1066 for example).