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[ChipHell] Naked 4870x2 Pictures! - Page 8

post #71 of 116
Quote:
Originally Posted by darkcloud89 View Post
I have a feeling I'm looking at the fastest consumer graphics card in the world at the moment...
Its not a consumer graphics card... at the moment.

This card is going to be expensive. Considering a single 4870 is $300, this will be around $600. These chips also produce more heat than Nvidia, meaning they are going to be hot hot hot.

But yeah, its going to be fast.
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post #72 of 116
Bah...consumer as in not-workstation

Too expensive for me, but no it will not be lacking as far as speed goes.
post #73 of 116
i still think im gonna settle for 2 x 4870's over a single 4870 X2. i didnt have success with the 3870X2 ... plus im a little skeptic on driver support.

still, looks like a monster card. ATI hit the nail on the head so hard this round.
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post #74 of 116
Quote:
Originally Posted by gtarmanrob View Post
i still think im gonna settle for 2 x 4870's over a single 4870 X2. i didnt have success with the 3870X2 ... plus im a little skeptic on driver support.
Wouldn't driver support for 4870 CF be the same as the X2's?
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post #75 of 116
Quote:
Originally Posted by dankoni View Post
Wouldn't driver support for 4870 CF be the same as the X2's?
That depends on if the HD4870X2 still has any secrets that we haven't been told yet...
post #76 of 116
Quote:
Originally Posted by darkcloud89 View Post
That depends on if the HD4870X2 still has any secrets that we haven't been told yet...
Well we know it has that PLX bridge chip... and I read the OS will supposedly only see 1 gpu, yes? So if anything, I would think driver support and compatibility for the X2 would be better.
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post #77 of 116
Quote:
Originally Posted by dankoni View Post
Well we know it has that PLX bridge chip... and I read the OS will supposedly only see 1 gpu, yes? So if anything, I would think driver support and compatibility for the X2 would be better.
The HD3870X2 had a bridge chip as well (albeit a different one), so that really isn't anything new as far as drivers are concerned. However, as for the OS only reading one GPU with the HD4870X2, I don't think that's true. It was rumored at first, but that would have to mean that the CrossFire load distribution is implemented in hardware and I don't think they're quite at that point yet. In its current state, CF uses AFR to scale beyond one GPU and that just would not be practical to implement in hardware. So they would have to switch to a method like Split-Frame rendering or SuperTiling, but this would require a sort of dynamic load balancing to ensure that each GPU gets as close to an equal amount of "work" as possible. I would imagine that this is something ATI is looking into the moment, but we would probably see it in software before it was implemented on hardware.
Edited by darkcloud89 - 6/28/08 at 10:28pm
post #78 of 116
Quote:
Originally Posted by darkcloud89 View Post
The HD3870X2 had a bridge chip as well (albeit a different one), so that really isn't anything new as far as drivers are concerned. However, as for the OS only reading one GPU, I don't think that's true. It was rumored at first, but that would have to mean that the CrossFire load distribution is implemented in hardware and I don't think they're quite at that point yet. In its current state, CF uses AFR to scale beyond one GPU and that just would not be practical to implement in hardware. So they would have to switch to a method like Split-Frame rendering or SuperTiling, but this would require a sort of dynamic load balancing to ensure that each GPU gets as close to an equal amount of "work" as possible. I would imagine that this is something ATI is looking into the moment, but we would probably see it in software before it was implemented on hardware.
Go into device manager on an X2 and the OS indeed reads it as 2 chips. However CCC acts like it is one so users can more easily use it. (For example not needing to enable CrossfireX.)
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post #79 of 116
wait, I'm confused.... I thought the 4870X2's cores were going to communicate through the memory.... what happened to that?

The memory is at least still going to be shared right?
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post #80 of 116
Quote:
Originally Posted by Licht View Post
However CCC acts like it is one so users can more easily use it.
So? All that does is masks the fact that each GPU is interfaced with separately. In a "true" hardware based CF solution as was rumored, the card would be interfaced with as a single monolithic GPU. I don't think ATI is quite at this point yet, but I do think it's something they would like to achieve since it seems in line with their strategy, and would eliminate any driver-scaling issues. If I'm wrong, it will be a very pleasant surprise.

Quote:
Originally Posted by HugeDink View Post
wait, I'm confused.... I thought the 4870X2's cores were going to communicate through the memory.... what happened to that?

The memory is at least still going to be shared right?
This was separate from the shared memory rumor since shared memory doesn't mask the presence of the 2nd GPU nor does it eliminate the need for a bridge chip. The shared memory thing is still very much up in the air AFAIK. The sort of hardware-based CF implementation (where its read as a single chip) I mentioned earlier would almost require shared memory to work optimally, but it doesn't necessarily work the other way around.
Edited by darkcloud89 - 6/28/08 at 10:20pm
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