I needs an explanation..

TemplarTemplar You first.
edited April 2004 in Hardware
Could anyone give me a quick rundown on how the speed of the FSB on Athlon64 and Athlon-FX chips is calculated? I know it was moved onto the die, and someone said it runs at the frequency of the chip, but a 2.2ghz FSB already? Maybe I just can't believe the numbers.. I'm trying to build a 64bit or 32bit 754pin system, and I'm trying to decide what memory would be good to allow myself a bit of ceiling for overclocking.

Comments

  • MediaManMediaMan Powered by loose parts.
    edited April 2004
    With the FX series of 64-bit processors (don't know about the 754 pin versions) overclocking options aren't as extensive. Since the memory controller is on-die kicking up the FSB cranks up everything in the system. Gone is that individual control over memory.

    You can up the multpiler (if the chip is unlocked) about 1 to maybe 1.5 x. (EG 12x is default..maybe can get to 13.5x) I have found on two different 940 pin motherboards that bumping up the FSB in BIOS even 1 MHz causes severe system instability.

    Lessee if I have this correct. HyperTransport links affect the bandwidth. Since the memory controller is on-die and it uses HyperTransport links to get to the memory then the following table in the following review (Halfway down the page) should give you some answers. At least as far as bandwidth is concerned.


    HYPERTRANSPORT BANDWIDTH SCALABILITY CHART

    http://www.short-media.com/review.php?r=206&p=8
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