Re: Memory DDR PC2 5200 vs 5300 ? by Leonard
Leonard
Tue Apr 08 10:25:55 PDT 2008
I will say this for the last time:
When you mix RAM of different speeds, all the RAM operates at the speed
of the slowest module, unless your computer crashes altogether. For
further information, conduct a web search with the search engine of your
choice using the following search term: mix RAM speed
---
Leonard Grey
Errare humanum est
Unknown wrote:
> Would you care to explain that?
> "John John (MVP)" <audetweld@nbnet.nb.ca> wrote in message
> news:eVqMjWOmIHA.1208@TK2MSFTNGP05.phx.gbl...
>> It doesn't clear anything, it muddles things up even more! All the RAM
>> manufacturers and all the RAM sellers always say that if you mix RAM of
>> different speed that (even if the FSB can handle the higher speed) it will
>> run at the speed of the slowest module.
>>
>> John
>>
>> Leonard Grey wrote:
>>
>>> "In fact, unless you change a setting, it will be all be run at the
>>> *higher* speed..."
>>>
>>> An internet search for 'mixing RAM speed' should make it clear for anyone
>>> reading.
>>>
>>> ---
>>> Leonard Grey
>>> Errare humanum est
>>>
>>> Ken Blake, MVP wrote:
>>>
>>>> On Mon, 07 Apr 2008 14:08:37 -0400, Leonard Grey
>>>> <Leonard@Grey.invalid> wrote:
>>>>
>>>>> Ken is correct, of course, and he provided more detail than I thought
>>>>> was needed.
>>>>
>>>>
>>>> Thanks, Leonard. The reason I thought clarification was needed because
>>>> the oft-seen statement that "When mixing RAM of different speeds, all
>>>> RAM operates at the lowest speed" erroneously implies that if you have
>>>> RAM running at a particular speed and you add slower RAM to it, it
>>>> will therefore all be run at the slower speed. In fact, unless you
>>>> change a setting, it will be all be run at the *higher* speed, and
>>>> with the attendant risk of the overclocked slower RAM failing.
>>>>
>>>>
>>>>> RAM (and CPUs) do not run at a set speed. Indeed, they are capable of
>>>>> running over a wide range of speeds. However, they do have a 'rated'
>>>>> speed - this is speed at which the manufacturer can predict the
>>>>> results. RAM and CPUs can successfully be run at higher or lower than
>>>>> rated speed, if you know what you're doing and you have a sense of
>>>>> adventure.
>>>>>
>>>>> Absent over- and under-clocking, when different speed RAM modules are
>>>>> used, then all of the RAM should clock to the speed of the slowest
>>>>> module. In reality, mixing RAM speeds can cause your system to be
>>>>> unstable (but not necessarily so).
>>>>
>>>>
>>>>> For that reason, it's always best to use RAM of the same speed.
>>>>
>>>>
>>>> Absolutely!
>>>>
>>>>
>>>>> Ken Blake, MVP wrote:
>>>>>
>>>>>> On Mon, 07 Apr 2008 13:02:23 -0400, Leonard Grey
>>>>>> <Leonard@Grey.invalid> wrote:
>>>>>>
>>>>>>> Two things to know about RAM:
>>>>>>>
>>>>>>> 1- When mixing RAM of different speeds, all RAM operates at the
>>>>>>> lowest speed.
>>>>>>
>>>>>> No this isn't correct. These RAM "speeds" are not really speeds at
>>>>>> all, but speed ratings--the speeds they have been tested to reliably
>>>>>> work at.
>>>>>>
>>>>>> The actual speed the RAM runs at is the speed the motherboard is set
>>>>>> to run it at. For safety, that *should be* the lowest of the speeds,
>>>>>> but isn't necessarily. If it's a higher speed, you are overclocking at
>>>>>> least some of the RAM, and are at risk of failure, with consequent
>>>>>> risk to your data.
>>>>>>
>>>>>>
>>>>>>> 2- You should only use RAM that has been specified for your computer.
>>>>>>> The major RAM vendors (e.g., Crucial) have RAM selectors that easily
>>>>>>> guide you to the correct RAM for your particular make and model of
>>>>>>> computer.
>>>>>>
>>>>>> I agree completely with that.
>>>>>>
>>>>>>> Ritter 197 wrote:
>>>>>>>
>>>>>>>> Is there a noticeable difference between PC2 5200 and 5300?
>>>>>>>>
>>>>>>>> I have now both installed, 1 MB each of DDR PC2 5300 and 2X 512MB of
>>>>>>>> DDR PC 5200.
>>>>
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