DDR Ram

[eagle013]

I'm getting my athalon 1500 shipped, The board will support both DDR and SD, they cannot be used at the same time though. DDR is faster.



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http://www.flightsim.com/dcforum/Use...8c6dabd9fb.jpg

[Spongey87]

Really?!! Are you sure??
I have never heard of a chipset that can support 2 different types of memory. Are you 100% sure?

[funkfly]

[font size="1" color="#FF0000"]LAST EDITED ON Dec-29-01 AT 11:57PM (EDT)[/font][p]i've got an Asus A7A266 mobo which supports either 3GB of SDRAM or 2GB of DDR ram...

awwwwwwww yeah!


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:* + :9 + :o = :7 -> :-sleepy

[mith]

RD is only about 5% faster than SD

[mith]

If I'm not mistaken... My abit BL7 can support both memories.. sd or rambus... I fogot what chip the MB is though.. sigh

[Spongey87]

Weird!! Know by any chance the chipset?

[Spongey87]

Excuse me, but that is wrong. RDR RAM is much faster than SDR. The problem with it, is that it is way too expensive. There's were DDR-RAM comes in. It is twice as fast as SDR-RAM.
SDR=133mhz
DDR=266mhz
RDR=800mhz

Wow, that's a big difference you may think. It is, but the thing is that RDR RAM is too fast. You don't need 800mhz for memory, 266 is about it. Why even get DDR? Well, although 133 mhz gives about what, about 300mb/s. although that may be fast for you guys, think how many megabytes go in and out when playing FS2002. A lot! So 133mhz kinda boggles down your computer, producing a bottleneck. You will not notice that on normal 2D applications, but on 3D, it makes a big difference. Now about RDR. Imagine a huge water pipe, with only a little bit of water through it. Now imagine the same amount of water coming through a smaller, more inexpensive pipe that is still big enougn as to not hinder the water. The big, expensive pipe is RDR-RAM, and the smaller DDR.

Spongey

[mith]

[font size="1" color="#FF0000"]LAST EDITED ON Dec-31-01 AT 00:53AM (EDT)[/font][p][font size="1" color="#FF0000"]LAST EDITED ON Dec-31-01 AT 00:51 AM (EDT)[/font]

Guess I'd better have a talk with my computer man.. LOL.. this is what I found on the internet myself which substantiates what you said... I stand corrected!

The well-known SDRAM has a 64-bit bus width. The bus indicates the amount of data which can be transferred at any moment. Since 8 bits equal 1 byte, we see that SDRAM can shift 8 bytes in an instant. If those 8 bytes are multiplied by the SDRAM's clock-speed, which in this example is 133 MHz, the data transfer rate is found to be at 1.064 GB/sec. In comparison, the new PC 800 RDRAM operates with a 400 MHz clock-speed; however, the data is transferred on the rising and falling edges of each pulse, resulting in a performance rating of 800 MHz and is represented by the description PC800. On the other hand, RDRAM only uses a 16 bits or 2 bytes wide channel. When multiplied by 800MHz, this translates into 1.6 GB/sec transfer rate, which gives an additional 0.536 GB/sec over the PC 133 SDRAM.



That would make it about 50% faster... sigh.. DON'T ya just HATE idiots like me who spread inaccurate information!... GDMFSOB...

[funkfly]

ALiMAGIK 1 chipset, composed of M1647 north bridge and M1535d+ south bridge, able to handle peak bandwidths of up to 2.1 GB/s... it also allows me room to upgrade cause as of now, i'm utilizing SaDRAM.

not a bad lil' mobo...:-lol

when i buy parts for my box, i like them to have the ability to upgrade to advancing hardware. for example, my last mobo had both a socket a, for AMD, and a socket 370, for intel P3, which is what i used to have. it works out rather well further down the line when you've got your options open cause you've thought ahead.


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:* + :9 + :o = :7 -> :-sleepy

[mith]

Yet another article.. LOL.. boy, when I'm wrong... LOL


RD-RAM (Rambus DRAM) memory review & information. RD-RAM operates at 400MHz or 800MHz if you add the DDR effect and also uses a slimmer bus than SDRAM memory. Intel's Pentium 4 bus is running at 400MHz (100MHz quad pumped). Rambus RD-RAM memory uses a 16-bit bus, while SDRAM memory uses a 64-bit bus. RD-RAM uses both the rising and falling clock edges. Rambus RD-RAM memory is capable of about 1.6GB/s bandwidth, twice as much as PC100 SDRAM, and 50% more than PC133 SDRAM. SDRAM PC133 run at 133MHz has a bandwidth of 1.06GB/s while PC100 SDRAM about 800MB/s of memory bandwidth.


Jeeeeez