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Sir Tompa
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 Posted: Thu Aug 18, 2005 3:25 pm Post subject: Running a AMD Athlon 1400 with FSB 133? |
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| My mainboard uses the VIA KT266A chipset Socket A. My mainboard manual says I have a FSB of 133 MHz and I am able to use DDR PC2100 RAM. AMD claims that the 1400 has a FSB of 266 MHz. This page says that the CPU has a bus speed of 133 but uses DDR technology which means the actual speed is 266 MHz. Why are they just confusing me with actual speed and not actual speed? Can I use this CPU or not? What CPU can I use? |
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Mixeur
Joined: 06 Jan 2005
Posts: 4038
Location: Sochaux, France
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| Posted: Thu Aug 18, 2005 3:50 pm Post subject: |
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| There are 2 kind of Athlon 1400 : one is working at FSB200 by default (blocked coeff of 14.0x) and the other one is working at FSB266 (coeff = 10.5x). |
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Sir Tompa
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| Posted: Fri Aug 19, 2005 2:19 pm Post subject: |
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Well if it's locked for 14x it uses a fsb of 100! Because 14x100=1400. Or the other example 10.5x133=1400.
It can't use a fsb of 200 or 266. |
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Mixeur
Joined: 06 Jan 2005
Posts: 4038
Location: Sochaux, France
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| Posted: Fri Aug 19, 2005 2:26 pm Post subject: |
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| Sir Tompa wrote: | Well if it's locked for 14x it uses a fsb of 100! Because 14x100=1400. Or the other example 10.5x133=1400.
It can't use a fsb of 200 or 266. |
You multiply system frequency by 2 when using DDR-RAM, because datas as send twice in a clock state (on front and on descent of the clock).
So when I say FSB200 this for a real DDR-RAM clock speed of 100MHz |
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Sir Tompa
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| Posted: Fri Aug 19, 2005 3:58 pm Post subject: |
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| So when my manual says 133 I actually have 266 when using DDR and I can put in a 1400 t-bird or even a palmino without problem? |
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Mixeur
Joined: 06 Jan 2005
Posts: 4038
Location: Sochaux, France
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| Posted: Fri Aug 19, 2005 4:11 pm Post subject: |
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| Yes your MB should run any T-Bird & Palomino without problem. |
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Sir Tompa
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| Posted: Sat Aug 20, 2005 12:25 pm Post subject: |
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| Thx for your help! |
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