Buffalo Firestix question

[galperi1]

I just recently upgraded to 4 GB of RAM. I originally had 2x1GB of Corsair XMS2 PC6400 DDR2 and just bought 2x1 GB of Buffalo Firestix PC6400 DDR2.

Now, before I installed the Firestix my RAM speed was reporting as 800Mhz.

After installation it reported as 667Mhz. In addition, I checked the RAM slots in CPU-Z and it's listing my Buffalo Firestix as PC5300 instead of PC6400.

What gives? Did they send me the wrong RAM sticks?

 

[tapir]

It probably defaults to a lower speed when you fill all 4 slots... motherboards have a tendency to do that, set it manually to PC-6400 in BIOS and make sure it runs stably.

Also, if you're not overclocking, then you wont be able to tell the difference anyway, because your FSB is less than 1600Mhz