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  #21 (permalink)  
Old November 22, 2009, 11:39 PM
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Quote:
Originally Posted by MpG View Post
My bad, I stand corrected on the 8-pin power draw. But I'm fairly certain that the PCI-E specs do dictate how much power can be drawn by the device, according to what connectors are attached to the device. It doesn't encompass the area of chassis/board/supply testing, so the onus is on those designers to make sure their products can supply what they're supposed to.

I believe the 300W number comes from assuming 75W from the slot, plus the additional power provided by the 6 and 8-pin connectors.
The 300W number does come from assuming 75W from the slot, since it's based on backwards compatibility with PCI-E 1.x. However, there is no specification for the maximum amount of power that a card can draw. There is only the ATX spec which dictates how much power can be supplied by each connector, and the PCI-E spec which dictates how much power can be supplied by the slot itself.
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Old November 23, 2009, 05:37 AM
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Regardless of whether or not it will be possible to power it (which they can), the major issues are heat and power consumption.
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  #23 (permalink)  
Old November 23, 2009, 05:51 AM
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They have already stated that the cooler on the HD 5970 is rated up to 400W of thermal dissipation.
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Old November 23, 2009, 04:49 PM
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That's still pushing it, you start getting heat problems at that point.... and ATI probably doesn't want another card with heat problems.... bad press.
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  #25 (permalink)  
Old November 23, 2009, 05:20 PM
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Quote:
Originally Posted by Sushi Warrior View Post
That's still pushing it, you start getting heat problems at that point....
And what do you think qualifies as a "heat problem"?
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Old November 23, 2009, 05:55 PM
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Quote:
Originally Posted by Zero82z View Post
And what do you think qualifies as a "heat problem"?
I don't know but you can only pump so much power through a small area before even water cooling can handle. Graphics cards are already really hot and it is easy to get a GPU to a 100c.
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  #27 (permalink)  
Old November 23, 2009, 06:04 PM
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Quote:
Originally Posted by belgolas View Post
I don't know but you can only pump so much power through a small area before even water cooling can handle. Graphics cards are already really hot and it is easy to get a GPU to a 100c.
If the cooling is designed to handle 400W, I don't see why there would be any problem.
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Old November 23, 2009, 06:56 PM
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If you look at current temps, then add 1/3 or so, that would be closer to what I would think it would be like. Not accurate at all, but a ballpark estimate.
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Old November 23, 2009, 07:07 PM
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Quote:
Originally Posted by Sushi Warrior View Post
If you look at current temps, then add 1/3 or so, that would be closer to what I would think it would be like. Not accurate at all, but a ballpark estimate.
Current temps are under 80C for both GPUs at a fan speed low enough to be mostly inaudible. Temperatures could be easily controlled with a more power-hungry card simply by spinning up the fan a bit.
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Old November 23, 2009, 07:17 PM
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I'm not saying 5970's with higher clocks won't happen, I'm just saying I doubt a 5990 will ever exist unless Fermi is spectacularly good.
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