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I have a MSI K9N Platinum (non SLI am2). I was wondering if there is any set relationship between the FSB and RAM original on this card and if this can be the reason that I almost can not clock up the FSB ... have 1 gig Corsair 667MHz and 3800 + single core.
There is no FSB on AMD systems. Memory controller operates on the CPU clock and memory bus operates on the memory clock. HTT (sometimes called the FSB) is only a reference clock as the rest of the system clock frequencies are calculated based on that. A common reason for HTT-wise overclocking stops, is that Hyper Transport clock too high. There you can avoid by reducing ldt-multiplier from 5x. (Maybe it has another name, but it is at least one multiplier which is on 5x initially, so it should be easy to find in the BIOS).
Ok,..was a little wiser now...thanks
But how much will be worked out before the hyper transport begins to wear?
Correct right if I say something stupid (given that I am a little noob :ohyeah:)
When overclocking, it is best to assume that the default time-to Hyper Transport (1000 MHz) will be max.
HTT 200 * LDT 5 = 1000 HT bus
HTT used other words to overclock processor in the same way as the FSB on the traditional systems. But if the HTT is increased without LDT-multiplier is lowered, Hyper Transport will be clocked high. It will be some reduction to before it becomes noticeable, so if you end up on the 800-900 MHz HT speed is not a crisis. Another example here:
HTT 300 * LDT 3 = 900 HT bus
The memory speed is calculated in principle from the CPU speed of the divide, but in the BIOS, these are manufactured in different ways. On some motherboards there are dividers in "FSB: RAM" ratings, and some are the steps as DDR667, DDR533, etc. It is overclocking of memory, is that the memory clock varies with the CPU clock, so no matter what the BIOS gives impression, it is always an integer that acts as divident. This division can be found in applications such as CPU-Z.
A straightforward approach is to lower the CPU multi and divider, to see how high the HTT clocks. Then you can try to find the max CPU and memory clock. Overclocking requires a lot of trial and error, and it is best to increase in small steps at a time.