DDR PC 2100 vs DDR PC 3200

[gary]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

What's the difference between DDR PC 2100 and DDR PC 3200 ? I think
even DDR PC 3200 acually operates at 400 MHz so why the numbers up
front ? Excuse my lack of knowledge, it's been 4 or 5 yeats since I've
put together my current system using PC 100 memory that operated at
the same speed as the PCI bus.

Thanks in advance.

Gary

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

"Gary" <gdn50@@@usol.com> wrote in message
news:J4mHQU2e27zL4s9h62AUAsTbmPZJ@4ax.com...
> What's the difference between DDR PC 2100 and DDR PC 3200 ? I think
> even DDR PC 3200 acually operates at 400 MHz so why the numbers up
> front ? Excuse my lack of knowledge, it's been 4 or 5 yeats since I've
> put together my current system using PC 100 memory that operated at
> the same speed as the PCI bus.
>
> Thanks in advance.
>
> Gary

The 2100, 3200 are a relative description of potential bandwidth of the RAM.
DDR400 actually operates at 200MHz. (dual data rate, or ~400MHz)

Generally, DDR400 (aka PC3200) is what you want, if your motherboard
supports it. PC2700 will only work with certain processors and PC2100 will
work with even fewer processors. For example, if you have PC2100 RAM, most
motherboards won't allow you to use a 800FSB processor, such as an Intel P4
Prescott 800FSB. With PC2100 (DDR266) you CAN use a 400FSB or 533FSB
processor. With PC2700 (DDR333), you can use 400FSB, 533FSB or 800FSB CPU.
But, if you use a 800FSB processor, your RAM will be underclocked to
clock-doubled 160MHz (essentially making it DDR320, if there was such a
thing).

There are other types of RAM such as DDR2 (just coming out, you will know if
your motherboard requires it) and PC3500 and PC4000 (not official, just a
marketing gimmick, implying that you can overclock this DDR400/PC3200 RAM so
that it has higher bandwidth) -Dave

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Gary <gdn50@@@usol.com> wrote in news:J4mHQU2e27zL4s9h62AUAsTbmPZJ@4ax.com:

> What's the difference between DDR PC 2100 and DDR PC 3200 ? I think
> even DDR PC 3200 acually operates at 400 MHz so why the numbers up
> front ? Excuse my lack of knowledge, it's been 4 or 5 yeats since I've
> put together my current system using PC 100 memory that operated at
> the same speed as the PCI bus.
>
> Thanks in advance.
>
> Gary

2100 = 266
2700 = 333
3200 = 400

I dont know who dreamed up the numbers on the left!

Now if the price difference is small its usually better to get the fastest
one available. It may whether an upgrade or two and has higher resale
value.

--
Lordy

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

DDR means double data rate. The 400Mhz you see is 200Mhz DDR. PC3200 is the
theoretical bandwith that it provides at that clock rate. PC 100 does not
operate at the speed of the pci bus, the pci bus runs at 33Mhz.

"Gary" <gdn50@@@usol.com> wrote in message
news:J4mHQU2e27zL4s9h62AUAsTbmPZJ@4ax.com...
> What's the difference between DDR PC 2100 and DDR PC 3200 ? I think
> even DDR PC 3200 acually operates at 400 MHz so why the numbers up
> front ? Excuse my lack of knowledge, it's been 4 or 5 yeats since I've
> put together my current system using PC 100 memory that operated at
> the same speed as the PCI bus.
>
> Thanks in advance.
>
> Gary

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

PC2100 runs at 266 MHz; the PC3200 runs at 400 MHz.

--
DaveW



"Gary" <gdn50@@@usol.com> wrote in message
news:J4mHQU2e27zL4s9h62AUAsTbmPZJ@4ax.com...
> What's the difference between DDR PC 2100 and DDR PC 3200 ? I think
> even DDR PC 3200 acually operates at 400 MHz so why the numbers up
> front ? Excuse my lack of knowledge, it's been 4 or 5 yeats since I've
> put together my current system using PC 100 memory that operated at
> the same speed as the PCI bus.
>
> Thanks in advance.
>
> Gary

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

tghe numbers dreamed up on the left are bandwidth numbers (in theroy). ie.
PC 2100 has a bandwidth of 2.1G/sec and operates at 266Mhz. PC 3200 has a
bandwidth of 3.2G/sec and operates at 400Mhz. All in theroy though. to
get the effective bandwidth your FSB has to match.I run PC3200 with a
XP2100+ which only has a FSB of 266 so I am runnign the ram at 133x2 (dual
channel) which gives me 2.1G/sec. I got the PC3200 RAM ready for my upgrade
to a faster CPU which hasn't happened yet.

"Lordy" <spam_box@gmx.co.uk> wrote in message
news:Xns95959FD8FBE95lordybigfootcom@130.133.1.4...
> Gary <gdn50@@@usol.com> wrote in
news:J4mHQU2e27zL4s9h62AUAsTbmPZJ@4ax.com:
>
> > What's the difference between DDR PC 2100 and DDR PC 3200 ? I think
> > even DDR PC 3200 acually operates at 400 MHz so why the numbers up
> > front ? Excuse my lack of knowledge, it's been 4 or 5 yeats since I've
> > put together my current system using PC 100 memory that operated at
> > the same speed as the PCI bus.
> >
> > Thanks in advance.
> >
> > Gary
>
> 2100 = 266
> 2700 = 333
> 3200 = 400
>
> I dont know who dreamed up the numbers on the left!
>
> Now if the price difference is small its usually better to get the fastest
> one available. It may whether an upgrade or two and has higher resale
> value.
>
> --
> Lordy

 

[jimbob]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

cowboyz wrote:
> tghe numbers dreamed up on the left are bandwidth numbers (in
> theroy). ie. PC 2100 has a bandwidth of 2.1G/sec and operates at
> 266Mhz. PC 3200 has a bandwidth of 3.2G/sec and operates at 400Mhz.
> All in theroy though. to get the effective bandwidth your FSB has to
> match.I run PC3200 with a XP2100+ which only has a FSB of 266 so I am
> runnign the ram at 133x2 (dual channel) which gives me 2.1G/sec. I
> got the PC3200 RAM ready for my upgrade to a faster CPU which hasn't
> happened yet.
>
> "Lordy" <spam_box@gmx.co.uk> wrote in message
> news:Xns95959FD8FBE95lordybigfootcom@130.133.1.4...
>> Gary <gdn50@@@usol.com> wrote in
> news:J4mHQU2e27zL4s9h62AUAsTbmPZJ@4ax.com:
>>
>>> What's the difference between DDR PC 2100 and DDR PC 3200 ? I think
>>> even DDR PC 3200 acually operates at 400 MHz so why the numbers up
>>> front ? Excuse my lack of knowledge, it's been 4 or 5 yeats since
>>> I've put together my current system using PC 100 memory that
>>> operated at the same speed as the PCI bus.
>>>
>>> Thanks in advance.
>>>
>>> Gary
>>
>> 2100 = 266
>> 2700 = 333
>> 3200 = 400
>>
>> I dont know who dreamed up the numbers on the left!
>>
>> Now if the price difference is small its usually better to get the
>> fastest one available. It may whether an upgrade or two and has
>> higher resale value.
>>
>> --
>> Lordy

So what should my 2100 be running at? 133? If this is changed does it make a
difference to the PC's efficiency?

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

On Wed, 3 Nov 2004 05:01:22 +1300, "cowboyz" <me@here.now> wrote:

>tghe numbers dreamed up on the left are bandwidth numbers (in theroy). ie.
>PC 2100 has a bandwidth of 2.1G/sec and operates at 266Mhz. PC 3200 has a
>bandwidth of 3.2G/sec and operates at 400Mhz. All in theroy though. to
>get the effective bandwidth your FSB has to match.I run PC3200 with a
>XP2100+ which only has a FSB of 266 so I am runnign the ram at 133x2 (dual
>channel) which gives me 2.1G/sec. I got the PC3200 RAM ready for my upgrade
>to a faster CPU which hasn't happened yet.
>
I am curious about the opposite situation. I currently run a AMD 1.4
GHz T-Bird in a Asus A7M266 motherboard using PC2100 memory.
I am thinking about building a new system with an AMD 64 cpu. I
realize it won't run at maximum speed if I do this, but is it possible
to use the PC2100 memory in the new mobo to test it? I would buy the
system piece by piece as money allows and wish to test the various
parts while they can still be returned. I would buy the new mobo and
cpu at the same time and install this memory until money permits
upgrading to the proper type. If it's possible, wouldn't I have to set
some custom values in the BIOS memory section?

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

>
> So what should my 2100 be running at? 133? If this is changed does it make
> a difference to the PC's efficiency?


Yes, and yes. But you won't notice a significant difference, unless you
overclock it past the point where it becomes massively unstable. -Dave

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

"Dave C." <mdupre@sff.net> skrev i en meddelelse
news:2uq1kdF2dbc26U1@uni-berlin.de...
> >
> > So what should my 2100 be running at? 133? If this is changed does it
make
> > a difference to the PC's efficiency?
>
>
> Yes, and yes. But you won't notice a significant difference, unless you
> overclock it past the point where it becomes massively unstable. -Dave
>
>

Had some PC 2100 running 380Mhz stable some time ago.
Made ? Don´t remember.
Give it a try..
G.

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Capman wrote:
> On Wed, 3 Nov 2004 05:01:22 +1300, "cowboyz" <me@here.now> wrote:
>
>> tghe numbers dreamed up on the left are bandwidth numbers (in
>> theroy). ie. PC 2100 has a bandwidth of 2.1G/sec and operates at
>> 266Mhz. PC 3200 has a bandwidth of 3.2G/sec and operates at 400Mhz.
>> All in theroy though. to get the effective bandwidth your FSB has
>> to match.I run PC3200 with a XP2100+ which only has a FSB of 266 so
>> I am runnign the ram at 133x2 (dual channel) which gives me
>> 2.1G/sec. I got the PC3200 RAM ready for my upgrade to a faster CPU
>> which hasn't happened yet.
>>
> I am curious about the opposite situation. I currently run a AMD 1.4
> GHz T-Bird in a Asus A7M266 motherboard using PC2100 memory.
> I am thinking about building a new system with an AMD 64 cpu. I
> realize it won't run at maximum speed if I do this, but is it possible
> to use the PC2100 memory in the new mobo to test it? I would buy the
> system piece by piece as money allows and wish to test the various
> parts while they can still be returned. I would buy the new mobo and
> cpu at the same time and install this memory until money permits
> upgrading to the proper type. If it's possible, wouldn't I have to set
> some custom values in the BIOS memory section?

As long as the board you buy lets you run the memory async then youll be
fine. so you can run your cpu fsb at 166 (x2=333) (or whatever the AMD64 is
at these days. I haven't kept up with it) and your ram at 133 (x2=266). You
will still get a boost in performance over the 1.4 CPU but the RAM will
still be holding back the AMD64

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

>
> So what should my 2100 be running at? 133? If this is changed does it
> make a difference to the PC's efficiency?

yes. 133x2 = 266. PC effiency. You can overclock it as much as you want
but no point in having your RAM at 200 and your CPU at 133. YMMV

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

Howdy!

"Gary" <gdn50@@@usol.com> wrote in message
news:J4mHQU2e27zL4s9h62AUAsTbmPZJ@4ax.com...
> What's the difference between DDR PC 2100 and DDR PC 3200 ? I think
> even DDR PC 3200 acually operates at 400 MHz so why the numbers up
> front ? Excuse my lack of knowledge, it's been 4 or 5 yeats since I've
> put together my current system using PC 100 memory that operated at
> the same speed as the PCI bus.

3,200 million bytes per second ... that's 400MHz x 8 bytes per
transfer (being 64 bits wide).

PC 2100 is actually 2,128 million bytes per second, but it's easier
to say PC2100 than PC2128 B)

RwP