** A7V8X - Sempron 2400+ Issue**

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

What does CPUz say your computer's clock/memory speed is?

"Paul - Home Pc" <paul.maitland@dsl.pipex.com> wrote in message
news:417ffe09$0$296$cc9e4d1f@news.dial.pipex.com...
> Hi
>
> I cant seem to get my PC to run fast - its locked at thinking i got an
> AthlonXP 1500+.
>
> Got a 2400+ Semperon installed - flashed the bios at 1015 release.
>
> Can mixed speed DDR memeory be a problem?
>
> Any Ideas?
>
> P
>
>
>
>

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

Brill - 100% excellent advive

Was set at 1333hz - the info explained it all

Many thanks

P
"Paul" <nospam@needed.com> wrote in message
news:nospam-2710041920070001@192.168.1.177...
> In article <417ffe09$0$296$cc9e4d1f@news.dial.pipex.com>, "Paul - Home Pc"
> <paul.maitland@dsl.pipex.com> wrote:
>
> > Hi
> >
> > I cant seem to get my PC to run fast - its locked at thinking i got an
> > AthlonXP 1500+.
> >
> > Got a 2400+ Semperon installed - flashed the bios at 1015 release.
> >
> > Can mixed speed DDR memeory be a problem?
> >
> > Any Ideas?
> >
> > P
>
> http://www.tomshardware.com/cpu/20 [...] on-01.html
>
> Says Sempron 2400+ is 10x166. Make sure the CPU clock is set to
> 166MHz and then it will be running at its full speed. 166MHz
> CPU clock gives FSB333 for the front side bus, and works best
> with DDR333 transfer rate on the DRAM.
>
> With mixed speed DDR, the BIOS will pick the slowest DIMM and
> use the timing info from it, to define operation of the
> whole memory bus.
>
> The other issue, is what dividers are available, between CPU
> clock and memory clock. Item 2 in section 1.4.2 of the user
> manual, tells you what combinations are available. With
> FSB266, you can run DDR266, DDR333, DDR400. With FSB333
> (which is what your processor has got), you can run DDR333
> or DDR400. So, if you had a stick of DDR266 memory mixed in
> there, then you'll be stuck with FSB266, unless you overclock
> the memory. That would require setting memory timing manually,
> using relaxed timing numbers for the RAM (i.e. if the RAM was
> CAS2, you would run it at CAS2.5 or CAS3, setting the other
> timing numbers to higher numbers as well).
>
> Item 3 in the same section of the user manual, says "PC2700
> two sticks of RAM max", so if you have three sticks of RAM
> mixed together, you are pushing your luck. Some BIOS
> automatically enforce reduced RAM clock speed, when they
> detect a quantity of RAM that isn't likely to work at that
> speed. Your best hope there, is to experiment with manual
> timing, and if the RAM still gives a lot of errors, dump
> two of the sticks, and buy a 512MB or 1GB double sided DIMM
> to replace them. If you want to buy a 1GB DDR DIMM, to
> replace some other sticks, buy it from a reputable supplier
> like Kingston or Crucial, as they won't sell you a DIMM
> constructed of "stacked" chips. Many of the generic 1GB
> DIMMs you find in Pricewatch, will be stacked construction,
> and that means the DIMM has twice the bus load of an
> ordinary double sided DIMM, and that will guarantee the
> bus will not run at full speed. (I call those "restocking
> fee DIMMs", because the unsuspecting buyer, ends up returning
> the memory, and giving the vendor a "restocking fee :-)
>
> HTH,
> Paul