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[TPU] Rambus and NVIDIA Sign Patent License Agreement - Page 6

post #51 of 58
If they just settled this, I don't think it's realistic to assume that Kepler will come with XDR2. They couldn't have added it until now, and still have to test it etc.
Or am i missing something?
    
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post #52 of 58
Quote:
Originally Posted by j0zef View Post

If they just settled this, I don't think it's realistic to assume that Kepler will come with XDR2. They couldn't have added it until now, and still have to test it etc.
Or am i missing something?

XDR2 has been ready to go being held up by legal disputes over patents. Don't see why it couldn't be on Kepler if none of the Kepler fabrication hasn't been started by vendors as of yet from news we've been hearing.

No testing required as the XDR2 is tested by RAMBUS for quality assurance on their end prior to shipping supplies.

Question will be if all this time RAMBUS has been sitting idle if they have the XDR2 ready to meet demands. Something says they are since they won't be supplying AMD simultaneously with current 7000 series as well that already started production and in retail.

Originally it should have been on the AMD and Nvidia GPU's prior to release of the new gen cards. AMD made a choice to move forward to be out on time with production and beat Nvidia as the first 28nm GPU.

Guess we'll see when Kepler is finally released if the wait was worth it or not. I'm not struggling performance wise and can afford to wait. Being patient though is killing the upgrade itch I get once a year.
     
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post #53 of 58
Quote:
Originally Posted by Arizonian View Post

XDR2 has been ready to go being held up by legal disputes over patents. Don't see why it couldn't be on Kepler if none of the Kepler fabrication hasn't been started by vendors as of yet from news we've been hearing.
No testing required as the XDR2 is tested by RAMBUS for quality assurance on their end prior to shipping supplies.
Question will be if all this time RAMBUS has been sitting idle if they have the XDR2 ready to meet demands. Something says they are since they won't be supplying AMD simultaneously with current 7000 series as well that already started production and in retail.
Originally it should have been on the AMD and Nvidia GPU's prior to release of the new gen cards. AMD made a choice to move forward to be out on time with production and beat Nvidia as the first 28nm GPU.
Guess we'll see when Kepler is finally released if the wait was worth it or not. I'm not struggling performance wise and can afford to wait. Being patient though is killing the upgrade itch I get once a year.

Is XDR2 really being held up by patent lawsuits? I thought Rambus is suing others.... others are not suing Rambus.


XDR2 is not common because it is hot and expensive.
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post #54 of 58
Quote:
Originally Posted by Homeles View Post

Not everyone is insane enough to bother with multi GPU setups.

You don't have to be "insane" to go with multi GPU, you just have to like very high minimum frame rates. 'My first SLI' has been a very trouble free experience.
Quote:
Originally Posted by DuckieHo View Post

XDR2 is not common because it is hot and expensive.

If it's using less power for the same bandwidth, or providing more bandwidth at the same power, how is it "hotter" than GDDR5? That makes no sense. That IS what you're comparing it to, correct?

The expensive part, that I can agree with.
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post #55 of 58
Quote:
Originally Posted by Homeles View Post

What's this going to do, exactly? Bandwidth is a non-issue. Unless XDR2 has lower latency, it's not going to do squat. Perhaps similar bandwidth at a lower cost, but I don't really see the need for this.
Also, pretty sure Rambus has been open to licensing their XDR2 forever. No one's just wanted to deal with them.

A. bandwidth is NOT an non-issue, AMD had to move to a 384bit bus because of being stuck with the same GDDR5, and tests show that Tahiti can very much be bandwidth limited

B. more bandwidth from the memory can mean less intricate memory interfaces, 384bit and certainly 512bit designs simply aren't as cost effective as 256bit and lower.

how is more performance for less cost somehow irrelevant?
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post #56 of 58
Quote:
Originally Posted by pursuinginsanity View Post

If it's using less power for the same bandwidth, or providing more bandwidth at the same power, how is it "hotter" than GDDR5? That makes no sense. That IS what you're comparing it to, correct?
The expensive part, that I can agree with.

I was thinking about XDR vs DDR2..... my fault there.

The expense is the deal breaker..... Rambus does not have the advantage of economies of scale and is fabless so it cannot push the chips either.


Does the cost of XDR2 and controller development outweigh the cost of additional traces and mature controller development of GDDR5? Is the investment in XDR2 worth it in the long run?
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post #57 of 58
And it's taken 4 years since the spec was released and 7 years since the announcement of it's existence - and what have we been waiting for? - just for a deal to be signed that gets these chips onto cards - this whole debacle has taken far too long to be resolved - they could have developed XDR3 by now - more tech-trickle tactics slowing down evolution - meh
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post #58 of 58
I sense another Pentium4/rambus fail....

Sorry, we can't produce our ram fast enough for your Nvidia cards tongue.gif
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