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A little Confused about DDR

 
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GL
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PostPosted: Tue Dec 23, 2003 10:56 pm    Post subject: A little Confused about DDR Reply with quote

I have an MSI 845 Ultra Pentium 4 mainboard. While the board only supports
266 memory,
I bought and installed some Kingston 333, thinking that it would clock down
and I could use it
in a later system that DID support 333. I then bought (2) 256 sticks of 266
Kingston memory.
When I installed that, all hell broke lose. I had to take the video card
out, and change it, but finally
I have it working with the 333 memory. My question is: If the memory clocks
down to 266, why wouldn't
it "play nice" with other Kingston 266. (maybe the actual chips on the
memory?) And also, I run some memory
intensive apps, but the system seems to run out of memory much quicker than
I would like. (even using rambooster)
Is it possible the timing of the 333 memory or the memory itself may not be
running correctly at all? Should I install
some 266 memory and use this 333 in a system that actually supports it?
Thanks in advance....
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Bruin
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PostPosted: Wed Dec 24, 2003 4:51 am    Post subject: Re: A little Confused about DDR Reply with quote

"GL" <noway@nowhere.com> wrote in message
news:4t_Fb.190085$I53.7879657@twister.southeast.rr.com...
Quote:
I have an MSI 845 Ultra Pentium 4 mainboard. While the board only supports
266 memory,
I bought and installed some Kingston 333, thinking that it would clock
down
and I could use it
in a later system that DID support 333. I then bought (2) 256 sticks of
266
Kingston memory.
When I installed that, all hell broke lose. I had to take the video card
out, and change it, but finally
I have it working with the 333 memory. My question is: If the memory
clocks
down to 266, why wouldn't
it "play nice" with other Kingston 266. (maybe the actual chips on the
memory?) And also, I run some memory
intensive apps, but the system seems to run out of memory much quicker
than
I would like. (even using rambooster)
Is it possible the timing of the 333 memory or the memory itself may not
be
running correctly at all? Should I install
some 266 memory and use this 333 in a system that actually supports it?
Thanks in advance....




Unsure of that Motherboard but it's not the RAM that clocks down, its the MB
that does it, depending on how you set it up. I have had issues with mixing
the RAM speeds. I believe the reason is setting the RAM timings by AUTO or
SPD.

What exactly is the FSB BUS speed & RAM speeds? Try synchronizing them.
If
they are sync'd at 333, try to clock the RAM at 266. The speed is only
supposed to be what the RAM is rated for. The 333 RAM should be fat-n-happy
at 266. The 266 RAM might not be able to hit 333. Make sense?
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GL
Guest





PostPosted: Wed Dec 24, 2003 4:58 am    Post subject: Re: A little Confused about DDR Reply with quote

Quote:



Unsure of that Motherboard but it's not the RAM that clocks down, its the
MB
that does it, depending on how you set it up. I have had issues with
mixing
the RAM speeds. I believe the reason is setting the RAM timings by AUTO
or
SPD.

What exactly is the FSB BUS speed & RAM speeds? Try synchronizing them.
If
they are sync'd at 333, try to clock the RAM at 266. The speed is only
supposed to be what the RAM is rated for. The 333 RAM should be
fat-n-happy
at 266. The 266 RAM might not be able to hit 333. Make sense?

Sorry for the lack of clarification.....the mb ONLY supports 266. Wouldn't
the board automatically clock
the ram down, considering it cannot be set to 333? I will check the bios and
get back, but what you said
is pretty much what I thought. Though I thought this would be
automatic...thanks!
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DaveW
Guest





PostPosted: Wed Dec 24, 2003 6:46 am    Post subject: Re: A little Confused about DDR Reply with quote

It sounds like the 266MHz and the 333MHz RAM sticks have different timing
requirements. It's always best, for stability reasons, to use identical
memory sticks.

--
DaveW



"GL" <noway@nowhere.com> wrote in message
news:4t_Fb.190085$I53.7879657@twister.southeast.rr.com...
Quote:
I have an MSI 845 Ultra Pentium 4 mainboard. While the board only supports
266 memory,
I bought and installed some Kingston 333, thinking that it would clock
down
and I could use it
in a later system that DID support 333. I then bought (2) 256 sticks of
266
Kingston memory.
When I installed that, all hell broke lose. I had to take the video card
out, and change it, but finally
I have it working with the 333 memory. My question is: If the memory
clocks
down to 266, why wouldn't
it "play nice" with other Kingston 266. (maybe the actual chips on the
memory?) And also, I run some memory
intensive apps, but the system seems to run out of memory much quicker
than
I would like. (even using rambooster)
Is it possible the timing of the 333 memory or the memory itself may not
be
running correctly at all? Should I install
some 266 memory and use this 333 in a system that actually supports it?
Thanks in advance....


Back to top
GL
Guest





PostPosted: Wed Dec 24, 2003 6:53 am    Post subject: Re: A little Confused about DDR Reply with quote

"DaveW" <none@zero.org> wrote in message
news:nl5Gb.121016$8y1.375466@attbi_s52...
Quote:
It sounds like the 266MHz and the 333MHz RAM sticks have different timing
requirements. It's always best, for stability reasons, to use identical
memory sticks.

--
DaveW


Ok, great. But when you say identical, do you mean brand and model as well?
Meaning: Could I use
266 corsair and then 366 kingston....I ask because I would like to order
some online....

Thanks
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Nate Edel
Guest





PostPosted: Wed Dec 24, 2003 7:16 am    Post subject: Re: A little Confused about DDR Reply with quote

GL <noway@nowhere.com> wrote:
Quote:
Sorry for the lack of clarification.....the mb ONLY supports 266. Wouldn't
the board automatically clock the ram down, considering it cannot be set
to 333? I will check the bios and get back, but what you said is pretty
much what I thought. Though I thought this would be automatic...thanks!

The bios settings also effect CAS latency, for example. If your new memory
is CL3 and the old is CL2, for example, it needs to all run at CL3.

Sometimes switching the order of the DIMMs will help in that case, or
manually setting to CL3 rather than "by SPD".

--
Nate Edel http://www.nkedel.com/

"But Marge! I've never felt so accepted in my life. These people looked deep
into my soul and assigned me a number based on the order in which I joined."
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Bruin
Guest





PostPosted: Wed Dec 24, 2003 10:01 am    Post subject: Re: A little Confused about DDR Reply with quote

"GL" <noway@nowhere.com> wrote in message
news:Wr5Gb.169540$dl.7518048@twister.southeast.rr.com...
Quote:

"DaveW" <none@zero.org> wrote in message
news:nl5Gb.121016$8y1.375466@attbi_s52...
It sounds like the 266MHz and the 333MHz RAM sticks have different
timing
requirements. It's always best, for stability reasons, to use identical
memory sticks.

--
DaveW


Ok, great. But when you say identical, do you mean brand and model as
well?
Meaning: Could I use
266 corsair and then 366 kingston....I ask because I would like to order
some online....

Thanks



Keep trying to get these to work together before buying more. I mean, the
furture will require totally different RAM most likely & unless your ready
to upgrade to something that will last a while, dont blow money on something
that you cant use on the next upgrade.

Someone else said switch slots, set RAM to CL3 in the BIOS, or possibly on
some boards, set it to "normal" or "maximum computability". You should be
able to get these to work with the right settings.
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