Re: Extra RAM Installation Blues Vol 2


"pmj" <post@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:etKvf.21714$iz3.5920@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> "Rabbit" <Rabbit_is@xxxxxxxxxxx> wrote in message
>> Wot's SPD ?
>
> Oh - *do* keep up at the back there!
> :-)

I try, I try :-)
>
> In one of the other Posts in the Thread I did say that SPD is
> (in the Context of RAM Memory Modules & BIOS Settings etc,)...
> "Serial Presence Detect".

Yes but some of those postes were dead techie so my rememberer diodn't take
them all in :-)

>
> OK...
> & what is "Serial Presence Detect" when it's at home?
>
> It's used by the BIOS to Read off the various things from the RAM,
> such as the Memory Timings (Refresh Rate & RAS-CAS etc,) so they can
> be Automagically Set by the BIOS to match the RAM.
>
> Most (though not all) BIOSes have a Setting (Option) to use SPD
> to Set the RAM Timings etc, or you can Set it to not use SPD
> & Set the Timings Manually

Is there any advantage to setting that manually ? See below.
>
>>... I can see it's to do with the RAM but what do the frequencies mean and
>>what's RAM timing.
>
> That isn't the sort of thing that can very easily be explained
> in a News Post!
>
> You'd need to look up on the various HArdware & RAM/Memory/Chip
> Manufacturers Sites for proper explanations of all that sort
> of thing
>
>>... And does it really matter ?
>
> Yes.
> It does matter!...
>
> It's absolutely essential (crucial)!!!
> If the RAM Timings (Frequency etc,) are Set wrong, then the PC
> won't even pass the POST (Power On Self Test), let alone Boot Up.
> & if they are Set wrong, but not so wrong as to fail the POST, then
> that can cause various things such as Crashes & Hans etc.
>
> But luckily, almost all Motherboards come Set with the proper RAM
> Timing Settings, so there isn't normally any prob.
>
> It's only if you *change* the various RAM Timing Settings & change
> them too much, (to the wrong Values), that you cause probs.

According to that CPU-Z program on the memory tab I have 1024 DDRAM which is
correct. The frequency timing is shown as 133MHz.
On the SPD tab, slot one I have 512 DDRAM with frequencies of 133, 166 and
200
On the SPD tab, slot two, I have 512 DDRAM with frequencies of 166 and 200
So should overall frequency be 133 ?
--
Sandra
People will forget what you said.
People will forget what you did, but
People will never forget how you made them feel.



.

Relevant Pages

  • Re: 3200+ auto reads 1900+
    ... CPU Multiple Setting = Menu ... clock 2.5 RAM I can set this as aggressive. ... timings as below for performance. ... Unless you know what you are doing, leave this setting as "by SPD") ...
    (microsoft.public.windowsxp.hardware)
  • Re: PC2-6400 RAM is 400Mhz or 800Mhz?
    ... lower if the RAM frequency is 200Mhz. ... default memory multiplier, forget what SPD says... ... "You need to find out what timings your RAM is capable of" ...
    (uk.comp.homebuilt)
  • Re: Memory confusion - P5WD2
    ... > and what the SPD is programmed to, ... > I also searched for the standard JEDEC timings, ... I am total agreement that the SPD should be set to JEDEC ... >> * Provided for overclocking purpose only. ...
    (alt.comp.periphs.mainboard.asus)
  • Re: Memory confusion - P5WD2
    ... > one set of timings posted, on the site, for their current modules. ... > if they have changed their thinking on programming the SPD? ... It officially supports up to DDR2 ... >>> I also searched for the standard JEDEC timings, ...
    (alt.comp.periphs.mainboard.asus)
  • Re: Advice on which Graphics Card.
    ... The the clock latency refers to how quickly the signal changes from a 1 to a 0 or vice versa - so a lower clock latency means your RAM is ever-so-slightly more responsive. ... At stock, a lower CL is minutely better; when you overclock RAM, you often have to relax the timings for stability, so you may have CL4 RAM running at CL5. ... If the OP has decent aftermarket CPU cooling, he should be able to clock the E6400 to a little beyond the E6600 stock speeds without noticeably cooking his components. ...
    (comp.sys.ibm.pc.games.action)
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