Archived from groups: alt.comp.hardware.homebuilt (
More info?)
Jack wrote:
> On Wed, 13 Oct 2004 15:18:30 GMT, Jack <a@b.com> wrote:
>
>
>>On Wed, 13 Oct 2004 12:48:53 GMT, Jack <a@b.com> wrote:
>>
>>
>>>On Tue, 12 Oct 2004 23:51:09 -0500, David Maynard <dNOTmayn@ev1.net>
>>>wrote:
>>>
>>>
>>>>Last Boy Scout wrote:
>>>>
>>>>
>>>>>Jack wrote:
>>>>>
>>>>>
>>>>>>Could someone clarify the difference? Advantages/disadvantages of
>>>>>>each? Thanks.
>>>>>
>>>>>This is just whether the chips are on both sides or whatever.
>>>>
>>>>That isn't how most sellers are using the term. What they usually mean, for
>>>>single or double 'sided', is that the memory is electrically organized as
>>>>one or two banks, respectively. For example, a 256MB DIMM built with 16Mx16
>>>>components may appear physically as a single-sided DIMM but the logical
>>>>electrical organization of the DIMM is dual bank, and the seller will, most
>>>>likely, call it "double sided" even though everything is on 'one side'.
>>>>
>>>>The misuse goes back to the days when, to get two 'banks' of memory on a
>>>>stick, you'd necessarily need to put a 'bank' on each side, so it appeared
>>>>'double sided' when it was 'dual bank', and it was a heck of a lot easier
>>>>to explain 'chips on both sides' than to explain what a 'bank' is. Now they
>>>>still say "double sided," regardless.
>>>>
>>>>Unfortunately, they kept the description that doesn't matter because your
>>>>computer couldn't care less where the chips are located; it's the bank
>>>>organization that matters because the socket addressing needs to support it.
>>>>
>>>
>>>Thanks. I had also come across a less thorough reference to that
>>>practice in my follow-up reading. Nothing like further muddying
>>>things
>>>I found that the chipset (and I assume MB?) supports either. If so,
>>>then the question goes back to which is better for me; again, with a
>>>possible problem of having a small PS. Any more thoughts on that
>>>issue? Thanks again for any and all feedback!
>>
>>Oops..forgot to mention capacity. Probably just 256 MB; it's got 256
>>already. Running XP, and going to be used for kids games and general
>>purpose. No reason to go to 768, is there, except just to have a 512
>>for later use, though. Oh yeah, I assume that going with PC3200, as
>>suggested by one person, would just mean that it would only run at
>>166MHz, but it would run fine? Thanks again!
>
> Okay, the last questions! I hope. Other stats that I'd like to know if
> it matters (seems they often change when going to PC3200/DDR 400) are
> that my current and supported RAM is 2.5v, and 2.5 Cas. Many (all?) of
> the DDR400's are 2.6v, and 3.0 Cas. Will they work in mine?
> "Officially" the intel site says that 2.5v only will,
Use 2.5 volt memory.
> as well as DDR
> 333/266/200 MHz only. Is that hard and fast, or merely what they've
> tested it with and that they'll guarantee with.
It's what they tested and what speeds the board will *run* the memory at.
And why test with faster than what's useful? Meaning, if the memory isn't
clocked to DDR400 then why pay for it, or test it? (test it to what? 333?)
Generally speaking, the 'faster' memory should work fine, at the lower
speed it'll be clocked.
Would you consider the statement "Supports DDR400, as long as you run it
333, 266, or 200" really a case of 'supporting' DDR400? Because that's the
functional case.
>
> FWIW: they also say, under System Memory Features
> (http://www.intel.com/design/motherbd/fn/fn_mem.htm):
> "Unbuffered single-sided or double-sided DIMMs"
> and then down the page say,
> "Integrator's Notes:
> Registered DIMMs are not supported.
> Double-sided x16 DIMMs are not supported."
>
> Since they don't just say double-sided, but also x16, if I understand
> it right, they mean actual double-banked chips are not supported. But
> the first statement "seems" to say otherwise. Or is the first
> statement referring to the physical configuration, and the second
> saying that double-banked ones aren't?
They're telling you that 'one' configuration of double banked, using x16
chips, is not supported.
> Aarghhh... Thanks again.
>
>
>>>>> When it
>>>>>comes down to choosing RAM, just go to the manufacturers site and see if
>>>>> what RAM they recommend for your motherboard. Most name-brand
>>>>>manufacturers have websites that tell you what to use with your
>>>>>motherboard.
>
>