How important is it ?

to match memory speed with the fsb?

i read that they should be similar?

thanks!
8 answers Last reply
More about important
  1. It's not that critical, honestly, but you can run them 1:1 if you want.

    Also, note that a 1:1 ratio actually means matching DDR2-533 with a 1066 bus, DDR2-667 with a 1333 bus, and DDR2-800 with a 1600 bus. This is because memory is double pumped, but the FSB is quad pumped.
  2. cjl said:
    It's not that critical, honestly, but you can run them 1:1 if you want.

    Also, note that a 1:1 ratio actually means matching DDR2-533 with a 1066 bus, DDR2-667 with a 1333 bus, and DDR2-800 with a 1600 bus. This is because memory is double pumped, but the FSB is quad pumped.



    what if my fbs is 2600 mhz?

    it it good if i put 4x 667mhz memory sticks? 4x667= 2668.
  3. computernewb said:
    what if my fbs is 2600 mhz?

    it it good if i put 4x 667mhz memory sticks? 4x667= 2668.



    No that doesn't matter. cjl post said everything. My Q8200 has 1333MHz FSB and i'm running DDR2 @ 800MHz, that was 12:10 ratio, i think.

    As said in cjl's post, RAM is dual pumped, FSB is quad pumped.
  4. computernewb said:
    what if my fbs is 2600 mhz?

    it it good if i put 4x 667mhz memory sticks? 4x667= 2668.

    2600?

    Are you sure it's running that fast? Unless you overclocked your CPU by a rather tremendous amount, I would guess that 2600 is your core speed, not your FSB. If you somehow did have a 2600FSB though, then you would need 1300MHz RAM to run 1:1. The number of sticks doesn't matter.
  5. cjl said:
    2600?

    Are you sure it's running that fast? Unless you overclocked your CPU by a rather tremendous amount, I would guess that 2600 is your core speed, not your FSB. If you somehow did have a 2600FSB though, then you would need 1300MHz RAM to run 1:1. The number of sticks doesn't matter.


    He probably gave 2600FSB as an example.
  6. cjl said:
    2600?

    Are you sure it's running that fast? Unless you overclocked your CPU by a rather tremendous amount, I would guess that 2600 is your core speed, not your FSB. If you somehow did have a 2600FSB though, then you would need 1300MHz RAM to run 1:1. The number of sticks doesn't matter.



    im sorry. i thought i read 2600. this is my mobo. under specs next to fsb it says 2600. where can i find out my exact speed? i have cpu z, and everest home edition but cant find it

    http://www.newegg.com/Product/Product.aspx?Item=N82E16813138155&cm_re=BioStar_TA785GE_128M_AMD_785G_AM2%2b_Motherboard-_-13-138-155-_-Product
  7. Ahh.

    You have an AMD, so you actually don't have a FSB. You have an HTT and an IMC, and the speed of the two are completely unrelated. Basically, your memory speed doesn't need to be linked to your HTT speed in any way.
  8. cjl said:
    Ahh.

    You have an AMD, so you actually don't have a FSB. You have an HTT and an IMC, and the speed of the two are completely unrelated. Basically, your memory speed doesn't need to be linked to your HTT speed in any way.


    cool thanks
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