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Comment: Re:good card for playing with GPGPU? (Score 1) 132

by valenti (#31642848) Attached to: Nvidia's GF100 Turns Into GeForce GTX 480 and 470

If you are interested in playing, any card 8xxx series or above works. (Nvidia) For instance, this Macbook has 9400M and I was able to download the CUDA stuff and run the sample programs with no trouble. RE the double precision and # of shaders (or performance), it really depends on what your code uses and how fast you need/want it. Easiest to get something running and then see where the bottleneck is, and how much it costs to fix.

Mostly my GPU usage is for folding (folding.stanford.edu), I like the new boards because they run cooler. Just ordered a Gt240 for about $65 after rebate. An advantage is that the 240 doesn't need the extra power cable. I think it will fold proteins as fast as about ten Core2 2Ghz CPUs. The best card I have so far is a 250, it equals about 20 of those Core2's. Last summer I picked up some 9600gso cards for about $35, those have similar performance to the 240, but require the extra power plug.

I would like to do something like atlasfolding.com , but with much less $$. It looks like this new 480 is about 4X's the 295 performance for ~same cost. Sounds good to me.

PS - if you get some good GPGPU code running and need more performance, try to hook up with a .edu HPCC. Most of them are getting into CUDA and might have spare cycles. You might have to switch to linux.

Comment: Wait & hope. Maybe 3650 wimax? (Score 1) 36

by valenti (#27770371) Attached to: Internet Hardware For White-Space Spectrum?

Knowledgeable people in the wireless ISP industry say whitespaces gear won't be available for at least another year. If it works out as expected, you would just buy it and use it, similar to today's wifi gear. It would require an Internet connection, to lookup the available channels database (daily) in your location.

As an alternative available today, you might consider the WISP 3650Mhz spectrum. The license for that costs $210. A brand I have looked at is Tranzeo, they sell Wimax gear in that frequency. (about $2000 for the AP, $250 for client radios). There are some exclusion zones that you aren't allowed to use 3650 within, so do a little research first.

And there is, of course, the usual wifi based gear. For example, see StarOS/Lucaya (my choice), or Mikrotik. And Motorola Canopy seems to work well at 900MHz.

Congratulations on being in the desert! You have a big advantage there with the lack of trees.

The best way to accelerate a Macintoy is at 9.8 meters per second per second.

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