hey tell me about DDR RAM

[bikdel]

What does DDR Ram Actually do?...

My ram is DDR 400..... i have only one stick of 512

If i put another stick of 512 mb ddr 400, only then DDR is activateed... isnt it??

TWO QUESTIONS

does that mean that ryt now my pc ram is working at 200 mhz???

If i add another stick of 1 gb ddr 400, will dual channel mode work?

[Cool G5]

Arrey plz post your query properly.I didn't get you.
Do you mean to say dual channel ram?

[vinaych]

Dude,
1) U don't need two RAMs for 'activating' DDR!!

DDR doesn't mean u must have two sticks to get it working!

2) You can have any sized RAM with your initial RAM.

[bikdel]

What does DDR Ram Actually do?...

My ram is DDR 400..... i have only one stick of 512

If i put another stick of 512 mb ddr 400, only then DDR is activateed... isnt it??

TWO QUESTIONS

does that mean that ryt now my pc ram is working at 200 mhz???

If i add another stick of 1 gb ddr 400, will dual channel mode work???

[shashank4u]

dual mode will only gets activated when you two similar kinda RAM sticks in alternate slots.
for eg if you have four slots 1234

then if you put 512 DDR400 in the slot 1 and 3 dual mode will be activated automatically you will get a notice while booting and you will get performance boost.

[bikdel]

common i know that but i think dual channel mode needs two. im sure of that fact for DDR II but dunno about the older sibling DDR . got it man?

Nope dual; chhannel is not enabled by hvaeing one stick only..
dual channel needs two sticks to double the data bandwith........

I wanted to know wether 2 different size... i mean one 512 mb n other 1 gb modules can be used or not for having dual channel????

[shashank4u]

why have u started two similar threads ...
i ve replied to another thread plz check .

[ambandla]

DDR and dual channel DDR are different.

Dual channel DDR (first seen on AMD platform) needed two RAM sticks to activate it.

Normal DDR does not need two RAM sticks.

[vinaych]

Oh, I'm sorry! didn't know about dual channel DDR! my bad..

[bikdel]

man. ive just got 2 slots
now dont tell me it wont work. it ought to cuz there would be no use of DDR memory in my pc if dual channel is not possible

[bikdel]

my motherboard is ECS P4M800 M ... with VIA chipset

2 RAM Slots , One is Occupied by 512 mb DDR 400

JUst wanted 2 know if there will be increase in memory bandwith as well by addding one more similar stick???

[slugger]

Originally Posted by bikdel

What does DDR Ram Actually do?...

well DDR RAM does d same thing that RDRAM, SDRAM and EDO RAM do

Originally Posted by bikdel

My ram is DDR 400..... i have only one stick of 512

If i put another stick of 512 mb ddr 400, only then DDR is activateed

well ur DDR RAM is activated weather or not u put 1 or 2 or 3 or even 4 RAM cards

wat u r talkin about is Dual-channel Memory Architecture which is a feature of ur motherboard

only if your motherboard supports this feature, will u get dual channel advantage by adding two memory cards

Originally Posted by bikdel

does that mean that ryt now my pc ram is working at 200 mhz???

If i add another stick of 1 gb ddr 400, will dual channel mode work???

your RAM is operating @ a speed of 400MHz

to get dual channel advatage d following conditions must be fulfilled

Same capacities

Same clockspeed

Same number of chips per side

[slugger]

d00d ur mobo does not support dual channel memory

[bikdel]

man then whats the purpose of havin DDR, they could have uswed SDRAM as well..........

wait. do u mean that even if i add more ram the effective bandwith will remain same? **** man..... now im definitely goin for an upgrade

[slugger]

well u mobo does not support SDRAM

DDR SDRAM

SDRAM

[indian_samosa]

Guys ,, can anybody shed some light on this .. I have 512MB DDR 400 single stick but in Cpu-z it shows 200Mhz max bandwidth ?? How come ? then why does it say 400 ?

[slugger]

@indian samosa

wat mobo u havin?

wats der in d memory tab?

BTW it is saying Maximum bandwidth =200MHz

[indian_samosa]

I am having Mercury PSM4 v5.0 SiS 661FX mobo..
Then what does the 400 thing mean ??

EDIT: I checked in the BIOS. ... There are 3 entries in CPU pnp setup ..
1.Automatic thing ...... enabled.
2.Cpu Freq setting .....200
3.Ratio of Cpu Freqram freq .......1:1
4.DRam freq .............200 Mhz.

Now If I select the auto to manual ...then I can max change the Cpu Freq setting to 255 .....and the Dram freq also changes according to the ratio used.

I have a Pentium 4 2.8GHz HT 478 socket proccy !

[bikdel]

common i kno my MOBOdoes not support SDRAM. i wanted to say that there was not much good by incorporating DDR SDRAM in my mobo........ man if u cant use dual channel then what the heck is DDR good for?...SDRAM would have done, apart fromthe bit fast timings and lower latencies

i have the same problem this guy indian_samosa has......

[slugger]

Originally Posted by bikdel

man if u cant use dual channel then what the heck is DDR good for?...SDRAM would have done, apart fromthe bit fast timings and lower latencies

d00d Dual channel memory arhitecture is a feature if the motherboard

whereas DDR SDRAM is evolution in RAM technology

just read d link i gave above

[bikdel]

oh... yh got it.......... but why does this stupid CPUZ show 200 mhz for my ram... thats my concern...

but tell me one thing SLUGGER........ if i overclock my Celeron 2.26 ghz running at an FSB of 133*4=533 mHz to 166*4=664, my ram wont give up isnt it?.......... cuz it wont feel the load until anything more than 200*4=800 is achieved..... isnt it?

[bikdel]

gr8 work, thankx. my bad..

and BTW good joke
" well DDR RAM does d same thing that RDRAM, SDRAM and EDO RAM do "

[shashank4u]

Plz refer to your mobo manual to see if dual channel mode is supported .
BTW care to share you mobo model

[bikdel]

h.. yh........my mobo is ecs p4m800m and has only 2 slots...... so now im pretty sure dual channel is not enabled

[slugger]

ur memory specs

Single-channel DDR memory architecture
2 x 184-pin DDR DIMM socket support up to 2 GB
Support DDR400/333 2.5V DDR SDRAM

[slugger]

i am not so sure of it myself cause me RAM operates @ 266MHz but it shows 133MHz ind HW id sw

and my mobo also supports 266

so i geuss there is nothing wrong with d sys if all our clockspeeds r being shown as half of wat it actually is

probably operating @400 and 266 resp

[shantanu]

hey please tell me about duplicate threads ? why you create it.. ?

try to be patient when you ask something.. rather than creating more threads !

[ambandla]

Originally Posted by bikdel

oh... yh got it.......... but why does this stupid CPUZ show 200 mhz for my ram... thats my concern...

but tell me one thing SLUGGER........ if i overclock my Celeron 2.26 ghz running at an FSB of 133*4=533 mHz to 166*4=664, my ram wont give up isnt it?.......... cuz it wont feel the load until anything more than 200*4=800 is achieved..... isnt it?

RAM freq. is 200MHz for one channel and it will run at 400MHz when dual channel is enabled.

[wizrulz]

DDR SDRAM is a class of memory integrated circuit used in computers. It achieves greater bandwidth than the preceding single-data-rate SDRAM by transferring data on the rising and falling edges of the clock signal (double pumped). Effectively, it nearly doubles the transfer rate without increasing the frequency of the front side bus.

Thus a DDR-400 will show mem clock speed of 200Mhz.

[bikdel]

okay got it guys.. n bTW

i dint mean to post 2 threads....... i use BROWZAR 1.0 and sometimes it acts buggy. sorry 4 that