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[Rambus] XDR™2 vs. GDDR5 - The Future Of Memory

post #1 of 63
Thread Starter 
Quote:
XDRâ„¢2 Memory vs. GDDR5
The Future of Memory


XDRâ„¢2 memory is the latest generation of the award-winning XDR memory architecture. Capable of unprecedented data rates of up to 12.8Gbps, XDR2 is the world's fastest memory solution. It delivers twice the peak bandwidth per device when compared to GDDR5 DRAM.



Fast and Smart

The XDR2 memory solution provides incredible bandwidth performance and does so at far lower power than GDDR5 memory. In fact, XDR2 consumes 30% less power than GDDR5 at equal bandwidth performance. Given equal power budget, XDR2 memory provides 50% more bandwidth than GDDR5. And at full speed, XDR2 DRAM deliver twice the bandwidth of GDDR5 devices.

Born of the Terabyte Bandwidth Initiative

XDR2 memory achieves this power and performance leadership through key Rambus innovations, many of which were developed through Rambus' Terabyte Bandwidth Initiative. The first to employ a Fully Differential Memory Architecture (FDMA), XDR2 memory has improved signal integrity and lower voltage swing versus single-ended signaling architectures such as GDDR5. Other innovations include Flexlinkâ„¢ C/A, for more capacity scalability and flexible access granularity, and 16X Data Rate which allows the XDR2 memory to run at twice the data rate of GDDR5 with a clock running at about half the speed of the GDDR5 clock.

Rock Solid and Pin Efficient

The Fully Differential Memory Architecture of XDR2 memory enables rock solid signal integrity at blindingly fast speeds. Differential signaling in combination with pin-efficient Flexlink C/A technology, enables XDR2 memory to deliver a breakthrough level of performance with fewer controller and DRAM pins than single-ended GDDR5 memory. Any way you look at it, speed, power, bandwidth, robustness or pin-efficiency, XDR2 memory is the best way to supercharge your next-generation graphics, gaming or multi-core computing design.
SOURCE
    
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post #2 of 63
What does XDR means for?
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post #3 of 63
It would be kinda helpful to have XDR2 memory instead of GDDR memory, just cause people would stop saying DDR2 = GDDR2.

Besides the performance upgrade.

Though, I never understood how OCing RAM on a GPU made much difference. Considering none of the current ones are bandwidth starved yet.
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post #4 of 63
sure bandwidth is nice to hear about, but because they didn't mention the fact, i would assume the latency is inferior to that of GDDR5? (perhaps by a long shot?) afterall. bandwidth is nothing if you have a 10 second latency

if they can pull it off with same or better latency. i say it sounds good. but il remain doubtful until then
    
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post #5 of 63
Sounds expensive as hell.
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post #6 of 63
If XDR was better than GDDR1,2,3&5 why didn't they use it?
    
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post #7 of 63
Are there any devices that actually use this ram?
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post #8 of 63
Yeah, if XDR is better than current GDDR memory. Why aren't they put to use? :O
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post #9 of 63
Thread Starter 
Quote:
Originally Posted by BinaryBird View Post
Are there any devices that actually use this ram?
There must be, how else would they test it?
    
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post #10 of 63
The PS3 uses XDR1 The PlayStation 3 has 256 MB of XDR main memory and 256 MB of GDDR3 video memory for the RSX.
http://en.wikipedia.org/wiki/PlayStation_3
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