EduardoS (no@spam.com) on 4/20/11 wrote:
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>Vincent Diepeveen (diep@xs4all.nl) on 4/20/11 wrote:
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>>there's a mulhi and a mullo in opencl. both are different instructions.
>
>OpenCL? AMD ISA...
>
>Mullo is the traditional 32 bit integer multiplier, mulhi is used to perform 64
>bit integer multiplier and could be used for [0; 1[ fixed point numbers, but currently
>there is no way to use it this from OpenCL.

Sure there is. That's why there is 2 units now per each 4 pe's that can execute these instructions.

I'd not be amazed if they didn't improve the opencl compiler yet.

Yet your 'no way' is easy to prove wrong. Just look in opencl specs version 1.1, it lists there mulhi and mullo.

>>google for furmark and radeon 6990 it's eating 450+ watt.
>
>375W with the powercap at default position, 300W with it at -20% position and 450W
>with it at +20% position, FirePro cards are 150W or 225W, as Tesla cards, already
>waste too much words in this meanless discussion, power isn't directly related to reliability.
>

You're spreading a lot of desinformation; like so many here. What matters is how much those cards eat in total.

Pickup a random gamerssite:

http://www.geeks3d.com/20110303/amd-radeon-hd-6990-march-8-2011-3072sp-and-450w/

This report the guy writes is accurate. In furmark and gpgpu it eats 450+ watt, only during typical gaming it eats 375 watt.

Good gpgpu software uses all PE's, in games it's about being high clocked and a huge bandwidth to the RAM. That eats less watts than if you effectively use all PE's.

You're really off by a lot and very stubborn there. Google, there is so many gamerssite which measured this accurately.

Note that 450 watt is over 150 watt or so over the pci-e specs?

Just like you're total off for the 6990 you're also off by a few hundreds of watts for the Nvidia's.