P4's may get the needed bandwidth from DDR also!

[eden]

All right, forgive the linking, and perhaps most saw it, but if you didn't yet, DDR has a new technology out that may potentially be worth it: <A HREF="http://forumz.tomshardware.com/hardware/modules.php?name=Forums&file=viewtopic&p=57576#57576" target="_new">http://forumz.tomshardware.com/hardware/modules.php?name=Forums&file=viewtopic&p=57576#57576</A>
I did it with full intent to post that here, but unfortunatly Mr. Fredi moved it, when I wanted everyone to see it, since the CPU forum is the most crowded, and now thanks to him and his moderating, the post only got 50 views in the RAM forum...
So without further ado, I am linking you to it, and I hope those who didn't get the chance to learn about QBM, to read on and enjoy!

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[Quetzacoatl]

Ironic, Via actually made a technology that could benefit everyone. That's quite a change.

Soon enough, Intel will make the i845s...imagine dual channel Sdram...*shudder*

 

[imgod2u]

It is quite impressive, however, it would require new memory modules. And we've all seen how low-supply has hiked the price of RDRAM. If my memory serves me, I think QBM is proprietary, not an open standard so that'll be the problem.

"We are Microsoft, resistance is futile." - Bill Gates, 2015.

 

[juin]

That better that turn on out-rage manufacturer that retag ram to have better profit.I again Jedec.Linux work well due to IBM intel not the open standart

At the end i have speak with a horny lady

 

[eden]

But what do you mean by Open Standard vs Propriatary in DDR RAM?
Are you saying that tech is strictly DDR, and that Rambus cannot use it? Sure is a shame, since RDRAM IS DDR.

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[eden]

I first quoted VIA as the maker, but it seems it's Kentron indeed and that VIA is only the first to supply.
Could've been weird if it was them, and what the reaction of anti-VIA people would be here.

Still, QBM DDR with Dual Channel from SiS or Intel, would be superb, that'll allow DDR 400 to easily be coupled with 800MHZ FSB and higher.

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[spud]

RDRAM and DDRAM aren’t the same RD is serial and DDR is parallel.

-Jeremy

<font color=blue>Just some advice from your friendly neighborhood blue man </font color=blue>

 

[eden]

But it uses DDR technology.

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[Dark_Archonis]

Actually, it's the other way around. RDRAM was around before DDR, and DDR was designed to use some of the technology in RDRAM. For example, The ODR (Octal Data Rate) from Rambus uses new technology which improves signal integrity and gives the ability to clock the RAM quite high. In fact, DDR-II uses the same type of packaging as RDRAM has right now, which is an improvement over the current packaging in DDR. Rambus also claims that at high clock speeds, DDR-II won't be able to have a good signal integrity, whcih may cause some heat and/or stability problems.

- - -
<font color=green>All good things must come to an end … so they can be replaced by better things! </font color=green>

 

[bront]

About time someone did that. I've always been suprised that since they did the QDR thing with RDRAM and the P4 bus they never thought to do it with SDRAM. I only hope it catches on. Also I hope it doesn't have the same problems of RDRAM, which it may simply on the grounds of only having Via support it initialy on the motherboard market and not enough memory manufacturing support.

If ignorance is bliss, then why is everyone so miserable?

 

[imgod2u]

When I say proprietary, I mean the QBM design. I forget the name of the company but they patented it and whoever wants to make QBM modules needs to get a liscense from them. Open standards like that of SDR SDRAM and DDR SDRAM from JEDEC are free for anyone to use as long as they abide by the specifications. DDR is simply a concept, its implementation on different types of memory can be dramatically different. You're mixing DDR technology with the specific type of ram, dubbed "DDR" for short.

"We are Microsoft, resistance is futile." - Bill Gates, 2015.

 

[FatBurger]

RDRAM and DDRAM aren’t the same RD is serial and DDR is parallel.

lol
I can't believe you linked me to a thread where you made yourself look like a fool :tongue:

<font color=blue>Hi mom!</font color=blue>

 

[eden]

Huh?

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[spud]

Haha I always try Joshie I always try.

-Jeremy

<font color=blue>Just some advice from your friendly neighborhood blue man </font color=blue>

 

[juin]

When I say proprietary, I mean the QBM design. I forget the name of the company but they patented it and whoever wants to make QBM modules needs to get a liscense from them. Open standards like that of SDR SDRAM and DDR SDRAM from JEDEC are free for anyone to use as long as they abide by the specifications. DDR is simply a concept, its implementation on different types of memory can be dramatically different. You're mixing DDR technology with the specific type of ram, dubbed "DDR" for short

It all SDRAM that is slow and cannot keep the pace with CPU

When we will hit 5 GHZ on CPU they will do what a 256 bit DDR-2 after that a 512 bit path DDR-3.Like granite bay is much larger MCH much more pin much more costly to implatation and to produce

At the end i have speak with a horny lady

 

[Crashman]

OK, from my understanding DDR II is supposed to be QDR. But QBM will use QDR technology in a different way by addressing half the memory on one half of the cycle and the other half on the other side of the cycle. This makes perfect sense to me, but of course would make single-sided modules obsolete...

It effectively makes a single channel dual channel by splitting up the wave, but wouldn't this require a signal divider on each DIMM slot?

<font color=blue>You're posting in a forum with class. It may be third class, but it's still class!</font color=blue>

 

[eden]

And can you provide proof for your astronomical number which states RDRAM can do something like 100000000GB/sec mr Juin? Or do you like just spreading FUD about RDRAM?

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[imgod2u]

DDR-2 is not QDR. DDR-2 will be some improvements in the way signals are sent and certain other changes. The overall difference will not neccessarily be per signal performance, but rather, allow farther scalability.

"We are Microsoft, resistance is futile." - Bill Gates, 2015.

 

[eden]

Yeah that's what I thought, but Crash has a point which I also was wondering, aren't we talking about making one-sided DIMMS, together in order to do Dual Channel? In other words, the RAM capacity is divided in two and you have to like fetch from each side each time to make the QDR algortithm?

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[imgod2u]

QDR is what the P4 bus uses. The memory operates independent of this as all signals go through the memory controller which then interfaces with the P4 bus. In other words, memory, dual channel or not, does not run at QDR. It runs in parity in the case of dual channel memory, with each channel providing a DDR signal. The number of modules on the memory should be irrelevent but optimally, both should have the same number of modules. A striping process is then used in which a cacheline is divided into 2 halves and distributed to the memory modules via 2 separate 64-bit DDR channels.

"We are Microsoft, resistance is futile." - Bill Gates, 2015.

 

[eden]

I forgot to mention I was asking this in regards to QBM not the QDR nature of the P4.

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