Noob Questions: RAM and FSB Speeds

[5er driver]

I'm very noob, have a new PC, and not trying to overclock here, I just want to get my hardware going at its rated speeds. I've got Kingston RAM PC6400, DDR2 800, 4 x 2GB modules and an Intel Q9650 installed on an ASUS P5Q SE mobo. The first pic shows the RAM was at 333MHz (I guess x 2 = 667Mhz?) when all the Bios settings were on "Auto". In the Bios I changed to RAM speed from "Auto" to "800" to get the RAM up to its rated speed, 2nd pic: 399.6MHz (I guess x 2 = 800MHz?). Have I done everything correctly so far? I left the timings and voltages on "Auto" and it looks like nothing with the timings changed, maybe that's good. But the FSB: DRAM ratio went from 1:1 to 5:6 by itself, is that OK?

Now I'm going to complicate things. My CPU is rated at 1333MHz FSB. The Mobo is rated at 1600/1333/1066/800 MHz FSB. In the Bios the FSB is on "Auto" = 333MHz as shown in the pic below - "Bus Speed 333". When I try to change it the Bios tells me that only 200 to 800 MHz are valid numbers. Why This? How can I get the FSB up to 1333MHz when the Bios only allows up to 800MHz? The CPU and Mobo both support 1333MHz. Thanks for any help you can give me.

ASUS P5Q SE Specs

 

[sketch145]

the FSB: DRAM ratio went from 1:1 to 5:6 by itself, is that OK?

yeah thats what should happen, the motherboard has adjusted the ratio to allow the RAM to run at 800Mhz

also, the fsb (front side bus) and the bus speed are different values.

all intel chips from pentium 3 onwards use a technology called 'quad pumping'
essentially this sends 4 commands for each clock cycle (one on the rising and falling edges, and 2 at intermediate points) what this means is that although your bus speed is only 333Mhz, you FSB is running at 333x4Mhz (1333Mhz)

so you're CPU/Motherboard are running at the right speeds as it is.

hope this helps.

 

[5er driver]

Thanks sketch! Good, so I don't need to change anything else......yet........Now, I just may want to dabble a bit in some OCing.