Im pretty confused about what my FSB is supposed to be. Everywhere I check, it says its 200mhz. I have an Athlon 64 3500+ Vencie core, which is supposed to have an FSB of 2000mhz. Also I am running it on an ASUS A8N sli deluxe. Am I missing something? Are you supposed to multiply by something to see what it really is, like video memory clocks? Also, i recently ran nvidia nTune, and it OC'd the bus speed to 225mhz, if that means anything.
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Re: Front Side Bus Confusion
A64s don't have a FSB in the traditional sense.
Thaken fromHTT Frequency
A64s don’t use a traditional Front system Bus. Instead they use a HyperTransport. I can only assume its abbreviated "HTT" to differentiate between Intel’s "HT" and Hyper-Threading Technology. They are VERY different.
The HyperTransport is what controls the base frequency for communications and CPU speed in our A64 System.
The CPU Speed is controlled by the HTT Multiplied by the CPU Multiplier, The HyperTransport or Memory controller is controlled by the HTT Multiplied by the HTT Multiplier, and Memory speed is controlled by the HTT Frequency, Multiplied by the CPU Multiplier and then DIVIDED by the Memory Divider. That’s a bit confusing for most folks. And it took me a while to grasp the concept as well.
HTT Multiplier
Most AMD Motherboards are designed to handle an 800-1000 MHz Hyper Transport bus. Factory Default on 754 CPUs is 800 MHz (A 4X Multiplier) and 1Ghz (5x) on 939 CPU's this is a Critical part of Overclocking an A64 to the Max. Pushing the HyperTransport past 1Ghz can cause all kinds of system instability that is commonly misconceived as "I maxed out my CPU" or "My Ram is holding me back"
Hope that helps. -
Re: Front Side Bus Confusion
Thanks. That cleared up alot of confusion.Comment
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Re: Front Side Bus Confusion
With that motherboard you could get a lot more than 225fsb from that venice :) Most have to problem reaching 2.6 (260fsb)Comment
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