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7970 specs revealed (Supposedly)

opethdisciple

opethdisciple

opethdisciple

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As usual, im probably late and this has been already been posted, but supposedly he specs for the Radeon 7970 has leaked!

7970-580x324.png


Source.

Yawn! Note to self: must not posted before looking at other threads!! :o
 
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I hope that <300 watts TDP isn't true otherwise it means the card is going to be one hot power hungry beast although the 3 watts idle figure is impressive.
 
Freddie1980 said:
I hope that <300 watts TDP isn't true otherwise it means the card is going to be one hot power hungry beast although the 3 watts idle figure is impressive.
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Last slides said <300 as well, they are more than anything generic slides that can be altered before release but give people a good idea. It's likely there is one set for the Dec 9th press day, and then a new set with more specific figures on launch. <300 is certain though, 75W slot, 75W 6 pin, 150W 8 pin. So overclocked and volted, you're looking at 300W max, and considering that same thing on the 6970 which doesn't use anywhere near 300W at stock ;)

SirCanealot said:
Only 2048 stream processors? Doesn't this seem a little low? Only a 20% increase in shading power? :/
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As others have said, its a significant change in architecture, per shader performance will increase, and while its only gut instinct, I would think some of the efficiency increase they found with the 6870(ahead once or twice, usually pretty close but 30% less shaders) will have made its way in, along with anything they've learned since, along with the new shaders, improved front end, 50-60% more bandwidth, etc, etc.

I can't tell you for sure where 2048 7970 shaders performance, I can tell you it will perform a lot better than 2048 Cayman/Cypress shaders. We'll have to see how much more when it releases basically.

You would assume a basically 3072 shader Caymen(1536x2) would, with appropriate bandwidth, tmu/rop increase would hopefully perform around 80% faster as doubling shaders has never doubled speed, but gets close. I don't think the 2048 shaders are going to make up the difference alone, but with efficiency increases elsewhere, its certainly possible.
 
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SirCanealot said:
Only 2048 stream processors? Doesn't this seem a little low? Only a 20% increase in shading power? :/
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Cayman had 1536 ALU, that's a 1/3 increase then. How did you come up with 20%? :confused:

ALXAndy said:
I just noticed. 300w power consumption.

LMFAO.

Half the power my eye !
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Radeon 6970 has a TDP of 250W and is relatively easy too cool.

I don't see the 7900 series exceeding 300W and with decent enough cooling it should be just fine temp-wise.

Let's not forget the skewed Fermi figures though, if it comes down to worst, the < 300W TDP may not be anywhere near the specification...
 
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ALXAndy said:
I just noticed. 300w power consumption.

LMFAO.

Half the power my eye !
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Learn to read, the 6970 was pre release giving slides that said <300W, because its less than 300W, guess what, 8W is also <300W.

It firstly NO WHERE in the slide gives actual power usage it specifies the range of less than 300W, nothing more or less, and NO ONE ANYWHERE has said half the power usage.

roughly speaking half the power usage FOR THE SAME PERFORMANCE.

IE a 7870 performing similarly to a 6970/50, could do so for half the power.

EVERY process ever has claimed half the power usage, yet every generation the high end uses more power, but the MIDRANGE tends to give the same performance as the previous gen, at half the power.

http://www.anandtech.com/show/2856

4870, 150W, 5770, 108W. But remember that the memory is the same and uses the same amount of power, the power circuitry eats power, etc, etc. So its likely the 4870 is using around 100W for the gpu alone and 50W for the rest, and the 5770 the gpu uses closer to 50W with the same 50W for everything else, give or take a few.

You will never actually get exactly half the power usage, and the 5770 supports more features anyway so theres a few more things to use power under load than the 4870.

Also yes, think about it, the 5870 is literally twice as fast as the 4870, and does it for just under 190W, how much power would a card like the 4870 but doubling everything use on 55nm? IE 1600 shader 4870 on 55nm, well 150W x2 = 300W, and the 5870 uses a lot less.

THe half the power holds true, but ONLY FOR THE SAME PERFORMANCE, with a card twice as fast there isn't a card to compare it to, but in the case of a 7970, you would compare it to a theoretical 6970 with double everything using roughly double the power.
 
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