too hot, too slow, and unmanufacturable part deux
LULZ
TX480 running Dirt2 demo
As it turns out, the numbers were indeed too good to be true. If you run the Dirt2 demo, the GTX470 and GTX480 drop back to DX9 mode, as you can see it in the picture above. Since they are doing far less work, frame rates go up. Running the DX11 code path drop frames by around 25 to 40 percent for the same work. In the game itself, DX11 works just fine on the GTX480, so it is likely that the demo lacked the correct profile for the then unreleased and 6 months out GTX4x0s.
For some odd reason, that point wasn't mentioned in the Nvidia slides SemiAccurate saw. Sources deep inside Santa Clara have told SemiAccurate that this wasn't due to the TWIMTBP budget cuts, it is probably just the old 'Nvidia honesty' coming forward once again. For some reason, the real numbers that compare DX11 to DX11 versions didn't make their press presentations even though the game had been out for months by then. Funny that.
For those unwilling to take such things as hard facts into account in order to protect their egos, we submit the above screenshot of the Dirt2 demo, running on a GTX480. The card is running at the official 1848 MHz (3696MHz effective) memory clock and the shaders are at the stock 1401MHz 'hot clock'.
Please note, in this case 'hot' is more literal than figurative, the GPU here is running at 87C, far hotter than any card that expects to have a realistic life span should be at. Unconfirmed reports from China have the card hitting 98C on furmark. Don't expect these 'puppies' to have a long life, even in dog years.
In the end, the card is too hot, too slow, and unmanufacturable. We told you so. Pop goes the ego.S|A
LULZ
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