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[softpedia] AMD to Showcase GDDR5 RV770XT Graphics Cards at Computex - Page 4

post #31 of 42
Quote:
Originally Posted by leakyfaucet View Post
If the memory is running way faster, then it is doing its share of the work faster. Even if the core isn't any faster, the data will be processed faster. Am I right?
The data will be available to the core faster, but if the memory is so fast that the memory is actually waiting on the core to use the information it's sending then it could be overkill. In this scenario the data will only be processed as fast as the core can handle it.
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post #32 of 42
Quote:
Originally Posted by RussianGrimmReaper View Post
No... The core does the processing the memory just holds the data.
But isn't this going to have a new core? How can you be so sure that it will be way too slow to benefit at all?
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post #33 of 42
Quote:
Originally Posted by leakyfaucet View Post
If the transfer time is reduced (memory speed increased) how does this not translate into faster data transfer?
See the post above yours. The core gets the data faster, but it can't process it fast enough. The memory's speed becomes null since the core can't keep up.

Quote:
But isn't this going to have a new core? How can you be so sure that it will be way too slow to benefit at all?
It will have a new core, but I don't expect that large of an impact. They added an extra 160 SPs (which for ATI isn't a lot) and now the shader and core clocks are independent of one another. The TMU's have also been doubled. It's not that much of a difference.

It's like if you go to a grocery store, and lots of people can grab stuff and go to the cashiers, but the cashiers are slow. No matter how fast the customers are, the cashiers(if slower) are what determine your final speed.
Edited by RussianGrimmReaper - 5/13/08 at 9:19pm
post #34 of 42
Quote:
Originally Posted by RussianGrimmReaper View Post
See the post above yours. The core gets the data faster, but it can't process it fast enough. The memory's speed becomes null since the core can't keep up.

It's like if you go to a grocery store, and lots of people can grab stuff and go to the cashiers, but the cashiers are slow. No matter how fast the customers are, the cashiers(if slower) are what determine your final speed.
Yeah I saw that and edited the post with a new question.
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post #35 of 42
Correct me if I'm wrong, but doesn't this mean that GPU overclocking on the new cards will have a much more significant impact given the fact that the card will be bottlenecked by the processor?

not to change the subject or anything. This is an interesting read.
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post #36 of 42
I don't quite believe that the memory is going to be so fast that any speed increases will be useless.

If that's how it works, then how do you explain the fact that increasing either memory speed or processor speed in a graphics card increases overall performance? Surely one must be running faster than the other, or "bottlenecking" the other, right? So why does increasing either speed result in an overall performance increase?
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post #37 of 42
Quote:
Originally Posted by PaulTa View Post
Correct me if I'm wrong, but doesn't this mean that GPU overclocking on the new cards will have a much more significant impact given the fact that the card will be bottlenecked by the processor?

not to change the subject or anything. This is an interesting read.
pretty much
(it should be like having overkill ram in u'r pc, it gives more headroom for oc)

its not necessary a bad thing to have a bottleneck u always get a bottleneck somewhere when u build a system but calling it a bottleneck is like seing the glass half empty (gddr5 is future proof)

i also read somewhere that only the 4870x2 will have the 512bit bus all the other card's will have the 256bit (but as all else it's just rumors) tho thy claim it was a leak from ati (tg daily i think it was)

i am weary exited about thees cards, as i always is about new ati cards
the shader clock and core clock difference is weary intriguing reminds me of what amd does, intel copy's and do better.

and i know the best bang for the buck will always be ati ^^ (sorry i'm ati fan, because pc has more uses then gaming, had i been a hardcore gaming dude i'd definitely go nvidia)
Edited by SpaceCat - 5/13/08 at 10:05pm
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post #38 of 42
Quote:
Originally Posted by SpaceCat View Post
pretty much
(it should be like having overkill ram in u'r pc, it gives more headroom for oc)

its not necessary a bad thing to have a bottleneck u always get a bottleneck somewhere when u build a system but calling it a bottleneck is like seing the glass half empty (gddr5 is future proof)

i also read somewhere that only the 4870x2 will have the 512bit bus all the other card's will have the 256bit (but as all else it's just rumors) tho thy claim it was a leak from ati (tg daily i think it was)

i am weary exited about thees cards, as i always is about new ati cards
the shader clock and core clock difference is weary intriguing reminds me of what amd does, intel copy's and do better.

and i know the best bang for the buck will always be ati ^^ (sorry i'm ati fan, because pc has more uses then gaming, had i been a hardcore gaming dude i'd definitely go nvidia)
It will probably be like the HD3870x2. It doesn't have a single 512bit interface, but two 256bit interfaces.
post #39 of 42
All this speculative talk of bandwidth and nobody knows what the performance of the core is going to be like.

Do you honestly think that ATi/AMD would add the extra cost of a 512 bit bus if they thought it would be no better than a 256 bit bus?

Also I seem to remember everyone throwing a hissy fit when the new 8800GTS's and the 3870 had 256 bit memory buses. Why is everyone complaining about this WHEN THEY DONT EVEN KNOW HOW MUCH THE CARD COSTS TO THE CONSUMER?!?!?!?!

It's very naive and ignorant to make any assumptions on this card based on the few facts available and expecially without a retail price.
    
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post #40 of 42
Quote:
Originally Posted by RussianGrimmReaper View Post
There is no doubt that NVidia's 9900GTX will be faster than RV770xt, the problem is, it will probably be 5-10% faster and cost 30-40% more.
And you speak with certainty about future components that are most likely in prototype stage as if there are mature drivers and people have been running them in their PCs for some time now...
    
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