"Phil Weldon" <> ha scritto nel messaggio
news:cGOni.9220$ ink.net...
> 'Fishface' wrote, in part:
> | I do not exactly understand everything you wrote. It seems that you are
> confused
> | about RAM speed numbers. Divide the rated FSB of the Intel CPU to know
> the
> | memory speed number required for default operation. A 1066 FSB Core 2
> Duo
> | requires DDR2-533 memory. A 1333 FSB CPU requires DDR2-667 memory.
> | Some motherboards. I operate my overclocked FSB 1066 CPU at actual FSB
> | of 1760. My RAM is operating at DDR2-880 speed.
> _____
>
> In part an attempt to answer the question from 'Marco':
>
> Default DDR2 memory operation:
> DDR2-400 default for FSB 800 MHz
> DDR2-533 default for FSB 1066 MHz
> DDR2-666 default for FSB 1333 MHz.
>
> Descriptions for different chipsets and motherboards use different
> terminnology.
>
> Another way of analysis, using default CPU clock : Memory clock ratio
> (2:1)
> is with the DDR2-XXXX rating half the FSB (FSB 800 MHz with DDR2-400, FSB
> 1066 MHz with DDR2-533, FSB 1333 MHz with DDR2-667.
>
> But operating at memory clock speeds closer to CPU clock speeds (closer to
> or higher than 1:1 is beneficial. I operate my Intel E4300 with a
> FrontSide
> Bus speed of 1200 MHz and a memory bus speed of 1200 MHz (with Patriot
> DDR2-1066 (PC8500) SLI ready memory. With a motherboard based on the
> nVidia
> 680i chipset (and perhaps other chipsets), DDR2 rated at almost any memory
> speed can be used - the DDR2 memory can operate at a speed unlinked to the
> FSB speed (though the memory bus operating speed selections are granular
> to
> some extent); the ratio is not limited to a few like 2:1, 3:2, 5:4, and
> 1:1).
>
> With my system these and more combinations operate correctly:
> FSB Memory Bus
> 1450 MHz 1200 MHz
> 1400 MHz 1200 MHz
> 1300 MHz 1200 MHz
> 1200 MHz 1200 MHz
> 1200 MHz 1066 MHz
> 1200 MHz 800 MHz
> 1200 MHz 600 MHz
> 800 MHz 1200 MHz
> 800 MHz 1066 MHz
> 800 MHz 800 MHz
> 800 MHz 600 MHz.
>
> All these pairings work, with system performance increasing with each
> increase in Memory Bus speed (according to SiSoft Sandra 2007).
>
> Phil Weldon
>
> "Fishface" <?> wrote in message
> news:kvNni.6804$ct5.2021@trnddc06...
> | The Babel Fish translation to English from Italian:
> |
> | Boys blank to all, my doubt is this: when he speaks himself about front
> side bus,
> | in order to bind together the just one ram must themselves be held
> present fsb
> | real or that theorist? I explain myself, with fsb to 1066 we have a fsb
> real to 266
> | that then becomes 1066 with the qdr. For sciegliere the ram, than
> reasoning it
> | is followed? Is kept account of the fsb of 266 and therefore could go
> well a ddr2
> | to 533 or is kept account of fsb the total and therefore to bind
> together
> one ddr2
> | 1066 (pc2-8500)? Because a mobo that it supports a fsb to 1066/800/533
> it
> | offers the possibility of ram ddr2 to 800/667/533? It would appeal to
> to
> me to
> | once comprise for all this argument and ringrazio all those who are
> disposed to
> | give to me one hand. Hello, Mark
> |
> | I do not exactly understand everything you wrote. It seems that you are
> confused
> | about RAM speed numbers. Divide the rated FSB of the Intel CPU to know
> the
> | memory speed number required for default operation. A 1066 FSB Core 2
> Duo
> | requires DDR2-533 memory. A 1333 FSB CPU requires DDR2-667 memory.
> | Some motherboards. I operate my overclocked FSB 1066 CPU at actual FSB
> | of 1760. My RAM is operating at DDR2-880 speed.
> |
>Grazie per le risposte, Marco
>
|
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