Sign in with
Sign up | Sign in
Your question

Dual DDR?

Last response: in Memory
Share
November 27, 2002 5:22:27 PM

What is Dual DDR?
The FAQ doesn't mention it.

Thanks.

/\/\ito

More about : dual ddr

November 27, 2002 7:30:10 PM

There exists two types, that often is mixed. Dual <i>channel</i> DDR refers to a system that uses two blocks of DDR memory simultaneously in order to double the bandwidth. This is similar to RAID0 for harddrives.
DDR2 is the next generation DDR memory that uses a quad pumped data bus as opposed to the dual pumped data bus for ordinary DDR. AFAIK, DDR2 is still some years away. So far I haven't seen any manufacturer making modules for PCs of those chips, and I haven't heard of any chipset that supports it.

<i><b>Engineering is the fine art of making what you want from things you can get</b></i>
<A HREF="http://www.btvillarin.com/phpBB/viewtopic.php?t=655" target="_new">My systems</A>
November 28, 2002 9:35:07 PM

Samsung has functional DDR2 modules, but they're low-density, they're high-latency (CL4), and they're not for sale. However, they exist as engineering samples and have been given out to some chipset manufactuers I believe.

They're listed under Samsung Semiconductors on their site.

-Col.Kiwi
Related resources
November 30, 2002 3:00:25 PM

DDR2 will be used for the Geforce FX as well as (most likely) the ATI R350. Both of these graphics cards are due out early next year (probably around Febuary, possibly later for the R350, though not by much). Motherboards, on the other hand, won't be using DDR2 for at least a year, I suspect pre-Christmas 2003.

Dual Channel DDR is available now, using either the nForce2 chipset for AMD (now available) or the Intel E7205 Chipset for the P4 (available in December, if not sooner).

The nForce2 Mobo's don't provide alot of advantages over other mobo's right now, because the Athlon CPU is curently unable to take advantage of the increased bandwidth (that'll change with the introductrion of the Barton core). The E7205 promises to greatly increase P4 performance, as the Intel CPU is very bandwith hungry. Check out the review at <A HREF="http://www.tomshardware.com/mainboard/02q4/021125/index..." target="_new">http://www.tomshardware.com/mainboard/02q4/021125/index...;/A>

--------------
Knowan likes you. Knowan is your friend. Knowan thinks you're great.
November 30, 2002 3:37:34 PM

i dont think DDr2 will take a year to be released, but who really knows. its all heresay

doublechannel ddr is a very nice thing for DDr. makes Rambus obsolete IMO =)
November 30, 2002 6:37:41 PM

The E7205 sucks in performance, it's not worth it at all.

Also the nForce 2 has better performance in Dual Channel despite not needed for extra bandwidth unused, since it has aggressive timings in DC mode.

--
*You can do anything you set your mind to man. -Eminem
December 2, 2002 3:55:37 PM

Yes the nForce has better performance, but not massively better. IMHO any 5% or less difference is unnoticeable.

--------------
Knowan likes you. Knowan is your friend. Knowan thinks you're great.
December 3, 2002 5:11:59 AM

Where you get that DDR-2 is quad pump it a send per bunch of 4 bit.

Now what to do??
December 3, 2002 10:56:08 AM

Hm. I have digged a little into this, but I have only been able to find preliminary data and news releases. According to those DDR-II is supposed to have a 4-bit prefetch architecture.

<i><b>Engineering is the fine art of making what you want from things you can get</b></i>
<A HREF="http://www.btvillarin.com/phpBB/viewtopic.php?t=655" target="_new">My systems</A>
December 4, 2002 6:11:03 AM

Correct me if I am wrong, but isn't dual channel DDR much more expensive than regular single channel DDR? To my understanding that is why it hasn't take center stage yet.


-----

Benchmarks don't lie :-)
!