Welcome to MilkyWay@home

Posts by John P. Myers

1) Message boards : Number crunching : Apologies in advance :) (Message 39537)
Posted 8 May 2010 by John P. Myers
Post:
In about 30 mins (8PM EDT) the Milkyway leg of the BOINC Pentathlon will commence. If Milkyway's server becomes slow, all of us (31 teams, including the top 6, from around the world) are truly sorry :) Einstein's server has been experiencing load problems lately and it has been our fault :( But they appreciate the work we've done.

There are 5 legs total in this race, Milkyway being only the 2nd. If you'd like to get in on this worldwide competition, please feel free to join SETI.USA, the #1 BOINC team in the world. All new members are welcome and full details of this event are in our forums at www.setiusa.net.

Hope to see you soon!
2) Message boards : Number crunching : IMPORTANT! Nvidia's 400 series crippled by Nvidia (Message 38496)
Posted 9 Apr 2010 by John P. Myers
Post:
lol Maybe i've gone a little overboard but since Nvidia won't publicly announce the gimpage, it's only fair that everyone finds out one way or the other. As a fellow cruncher, i would appreciate advice on what upgrades to stay away from.

Personally i've always used Nvidia GPUs. I'm not an ATI fanboi. (but may be soon lol) It's low-down and unfair to people like us for Nvidia to make these attepts at hiding. Frankly, it pisses me off.

I just don't want to see fellow crunchers spending their money on what they think is a great product for this project. That is all :)
3) Message boards : Number crunching : IMPORTANT! Nvidia's 400 series crippled by Nvidia (Message 38469)
Posted 9 Apr 2010 by John P. Myers
Post:
I don't know what the rated Integer speed on the current ATI cards is, but if someone else here does, please post it. The Integer compute speed on a 480 is ~672GIOPS. I do not recommend using any Nvidia 400 series card to crunch MW (unless a hack is found. I'm keeping my fingers crossed). They will only be ~2x faster than a GTX 285. ATI has that beat easily for the same price or less. If you've already ordered a 400 series, I'm pretty certain you could put it on eBay and get your money back and maybe a little more.

4) Message boards : Number crunching : IMPORTANT! Nvidia's 400 series crippled by Nvidia (Message 38430)
Posted 8 Apr 2010 by John P. Myers
Post:
@The Gas Giant, at that time, it was just a rumor. Since then, it has been confirmed and demonstrated with a benchmark.

If anyone was on the fence waiting for absolute confirmation, now you have it. The link to Nvidia's forum in my first post includes a post(on page 2) showing FP64, FP32, INT32 and INT24 performance.


Funny though how Nvidia has still yet to admit this outside of their forums. Even EVGA was not aware this was the case. They are now.
5) Message boards : Number crunching : IMPORTANT! Nvidia's 400 series crippled by Nvidia (Message 38378)
Posted 8 Apr 2010 by John P. Myers
Post:
In an effort to increase the sales of their Tesla C2050 and Tesla C2070 cards, Nvidia has intentionally crippled the FP64 compute ability by a whopping 75%. If left alone, the GTX 480 would have performed FP64 at 672.708 GFLOPS, almost 119 GFLOPS more than ATI's 5870. Instead, the GTX 480 comes in at 168.177 GFLOPS. Here is a link to Nvidia's own forum where we have been discussing this. You will see there is also a CUDA-Z performance screenshot confirming it, on top of the confirmation by Nvidia's own staff. Nvidia is not publically making anyone aware that this is the case. Anandtech also snuck the update onto page 6 of a 20 page review of the GTX 480/470.




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