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Thread: should the FSB of your CPU be the same as your RAM clock speed?




  1. #1

    Default should the FSB of your CPU be the same as your RAM clock speed?

    I have a x2 4600+ with a FSB of 1Ghz
    I was thinking if i should buy ram 2 x1GB ddr2 modules with a clock speed of 1000Mhz is it worth the extra money for the perfomance or would it not be noticable
    If the second what Ram should i go for?

  2. #2
    Join Date
    Nov 2003
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    Minnesota, United States
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    Default Re: should the FSB of your CPU be the same as your RAM clock speed?

    Your X2 4600 doesn't have any FSB at all. What you're referring to is the HyperTransport speed, which is pretty much unaffected by your RAM. Whatever RAM you have is probably fine.

  3. #3
    Join Date
    Oct 2005
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    cumbria, UK
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    Default Re: should the FSB of your CPU be the same as your RAM clock speed?

    on this line though, ive seen magasines and websites which recomend the "fsb" (HT) and the ram clocks to be in sync. apparantly this increases performance but i tried underclocking my rig slightly to do this : there was no benefit whatsoever in 3dmark05. maybe its just me - can anyone shed light on this?
    System Specs:
    AMD athlon 64 3200 venice @ 2.4ghz
    Asrock Dual-939SATA2
    Sapphire Radeon X800GTO2 chip r430 @ 480mhz core/540mhz mem with 1.6v vcore
    1gb Corsair XMS TwinX PC3200 timings 2-3-3-6 at 400mhz
    250gb Hitatchi deskstar T7K500 SATAII disk
    160gb samsung spinpoint PATA disk
    Asus 1608P2 DVD+/-RW Dual Layer
    Unbranded 500W PSU single 17A rail
    Innovatek and Asetek Watercooling (triple fan radiator)
    LOTS OF METAL

  4. #4
    Join Date
    Nov 2003
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    Default Re: should the FSB of your CPU be the same as your RAM clock speed?

    There are no good PC-related magazines. Just stop reading them. There hasn't been a decent one for years. They're not aimed at people who know their stuff, so even the writers don't know as much as they ought to, or at least don't write like they do.

    The base-clock, or HTT as people have come to call it, is not going to get anything from being sync'ed up with the RAM. It is not an FSB speed, and does not even relate to the RAM speed. It just so happens that the most convenient speed is around the same speed as DDR400, hence the use of 200MHz HTTs.

    An FSB does relate to the RAM speed directly, and there are even some chipsets that have performance issues with asynchronous dividers, so it makes quite a bit of sense to sync it up on older systems, mainly socket 478 and socket A and everything below. This is not at all the case with Athlon 64 systems, and newer socket 775 systems seem to completely lack the problem, though they do receive performance improvements from increased bandwidth. To contrast, you have to go below about DDR333 to see a significant performance drop on an Athlon 64.

  5. #5

    Default Re: should the FSB of your CPU be the same as your RAM clock speed?

    So there is no need to fork out extra money for some over priced ram.
    i was going to get....
    OCZ 1GB DDR2 1000Mhz

    Thanks Guys :D

  6. #6
    Join Date
    Apr 2004
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    Australia
    Posts
    1,525

    Default Re: should the FSB of your CPU be the same as your RAM clock speed?

    sneakybadger, have a read of this and then make up your own mind on what to get.

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