View Full Version : AMD cpu question
10-11-2001, 08:28 PM
I am curious about what would happen if I were to put a cpu with a 266 MHz fsb in a motherboard that only supports a 200 MHz fsb.
I imagine that the multiplier would stay the same, but since fsb is different, the 266 MHz fsb cpu would run slower. Can anyone confirm?
10-11-2001, 11:30 PM
and it would still run at the same MHz?
10-11-2001, 11:38 PM
my cpu only supports 200 fsb
i cant run at 266, it just makes an anoyting beeping sound
10-11-2001, 11:52 PM
so it won't even register the cpu?
yes it will still run at same clock speed just on a slower FSB
10-12-2001, 12:13 AM
10-12-2001, 12:21 AM
No it will not operate at the same frequency. What determines your processor's operating frequency is the Core's clock multiplier X the speed of the front side bus. So for example the Athlon XP 1.53GHz has a core clock multiplier of 11.5x and operates on a 133 (DDR 266) Front side bus. So you take the multiplier 11.5 and multiply it by the FSB 133. 11.5 x 133 = 1533 roughly. Now if you have a mainboard that only supports a 100MHz (DDR 200MHz) FSB then that same processor in that mainbord would run at 11.5 x 100 = 1150MHz. So no you would not be able to run the porcessor at the same speed if it is designed to run a 133 (DDR 266) MHz Front side bus.
10-12-2001, 12:24 AM
That's what I was thinking...
So I'd either have to adjust the multiplier or the fsb in order to have it run at the same speed. Hehe, I guess it would make overclocking easier!!!
10-12-2001, 12:27 AM
Well as long as that mainboard and your memory canhandle the 133MHz FSB and you have the option in BIOS or on the mainboard to overclock it 133MHz.
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