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[wccf] AMD To Discontinue Radeon HD 7990 Dual Chip GPU in Q3 2013 – Preps For Next Gen Launch - Page 7

post #61 of 66
Another source
Quote:
In trade, the Radeon HD 7990 is still listed and still available. Only when the models are sold off commercially, can be truly confirmed that the Radeon HD 7990 is no longer produced by AMD.

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post #62 of 66
Price is the problem and not the reviews unless it was proven that pacing issues is worse on it than other 7 series CF solutions , it got slammed as soon as consumers saw the price and no different from when the 7 series was launched, look at that price, its slamming time.

Oh and way to late into the generation cycle, people want new stuff and most wont fork out large sums this late in the cycle when new stuff is on the way.

I'm glad it flopped.
post #63 of 66
Has anyone got a test of 7990 in Quadfire on a 40 lane CPU VS the same on a 16 lane CPU?

I suspect there could be a noticeable difference on such massive needs of lane usage, perhaps 10%, but it's hard to find tests on 7990s. I guess nobody was buying them. hehe.
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post #64 of 66
Quote:
Originally Posted by fateswarm View Post

Has anyone got a test of 7990 in Quadfire on a 40 lane CPU VS the same on a 16 lane CPU?

I suspect there could be a noticeable difference on such massive needs of lane usage, perhaps 10%, but it's hard to find tests on 7990s. I guess nobody was buying them. hehe.

Or wait. I guess any Quad VS Quad on 40 VS 16 lanes might do.. (but they'd have to be around 7970's performance).
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post #65 of 66
Quote:
Originally Posted by fateswarm View Post

Has anyone got a test of 7990 in Quadfire on a 40 lane CPU VS the same on a 16 lane CPU?

I suspect there could be a noticeable difference on such massive needs of lane usage, perhaps 10%, but it's hard to find tests on 7990s. I guess nobody was buying them. hehe.

I don't think it would make any difference whatsoever. 8x/8x pcie 3.0 shouldn't bottleneck any gpu.

8x/8x 2.0 vs 16x/16x 2.0 might make a difference at high resolutions, but other than that there shouldn't be a difference.
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post #66 of 66
Quote:
Originally Posted by icehotshot View Post

I don't think it would make any difference whatsoever. 8x/8x pcie 3.0 shouldn't bottleneck any gpu.

8x/8x 2.0 vs 16x/16x 2.0 might make a difference at high resolutions, but other than that there shouldn't be a difference.

I'm not sure if you know this but 16x v3 is not "100%". Any higher bandwidth would be an advantage, though of course on current hardware other bottlenecks may be also important so it's hard to see that above 8x.

However, in this case it might be different: This isn't just 1 GPU, they are two, so on quad it would be practically like having x4 on 4 7970s on a mainstream CPU.

So I still wonder if a 40 lane CPU would be a big difference .I would find it VERY unlikely to not be at least 5-10% different.
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Overclock.net › Forums › Industry News › Rumors and Unconfirmed Articles › [wccf] AMD To Discontinue Radeon HD 7990 Dual Chip GPU in Q3 2013 – Preps For Next Gen Launch