[QUOTE=Prime95;325420]Good catch! I'll put it on my todo list for mmff / mfaktc. Unfortunately, I'm up to my eyeballs in more optimizations for prime95 FFTs (no, don't get excited). It should be possible to convert every mod_p call.[/QUOTE]

How much of a speedup (for mfaktc) are we looking at?

[QUOTE=ixfd64;325429]How much of a speedup (for mfaktc) are we looking at?[/QUOTE]

Just a guess: less than 2%, probably less than 1%

1%
 

When you're cranking out nearly 400 ghzdays/day with the gpu, a 1% increase is still more than any one of the cores on my cpu is doing. :)

Hi,

[QUOTE=TheJudger;325373]Hi,

I [B]guess[/B] that you have a good reason not upgrading your video driver[/QUOTE]
Yes, on this computer, system is maintained, updated and monitored by IT. I can't upgrade myself video drivers :no:

[QUOTE]Do you need a Windows or Linux executable?[/QUOTE]
A windows version please.

[QUOTE]On Windows it is not funny to switch CUDA toolkit version (at least for me...).[/QUOTE]

No problem. I will stick with my current version. And I will try to find a way to upgrade my nvidia drivers :smile:

Thanks.

[QUOTE=Aillas;325551]...A windows version please.[/QUOTE]

[URL="http://www.mersenneforum.org/showthread.php?p=324896#post324896"]Here[/URL] you go.

Dumb question: if I have GPU sieving enabled, do I need to run multiple instances for dual-GPU cards (such as the GTX #90), or is that only necessary for multiple cards?

[QUOTE=ixfd64;325572]Dumb question: if I have GPU sieving enabled, do I need to run multiple instances for dual-GPU cards (such as the GTX #90), or is that only necessary for multiple cards?[/QUOTE]

Yes, but you would anyway.

This new GPU-sieving mfaktc release got me thinking. Provided with enough power and adequate cooling, one could stick four GTX 580 (or even four GTX 590, if drivers support that), and get an insane combined through output from a single box.

[img]http://lab501.ro/wp-content/uploads/2010/11/4Way-02.jpg[/img]

[QUOTE=TObject;325585]This new GPU-sieving mfaktc release got me thinking. Provided with enough power and adequate cooling, one could stick four GTX 580 (or even four GTX 590, if drivers support that), and get an insane combined through output from a single box.

[img]http://lab501.ro/wp-content/uploads/2010/11/4Way-02.jpg[/img][/QUOTE]

Wowzers!! That setup would require significant cooling.

And I think the issue on the forum is performance per dollar. :rolleyes:

[QUOTE=TObject;325585]This new GPU-sieving mfaktc release got me thinking. Provided with enough power and adequate cooling, one could stick four GTX 580 (or even four GTX 590, if drivers support that), and get an insane combined through output from a single box.

[img]http://lab501.ro/wp-content/uploads/2010/11/4Way-02.jpg[/img][/QUOTE]

...if you have enough money to spare :smile:

EDIT:@Dubslow my case sucks, so I keep it open :max:

[QUOTE=kracker;325589]
EDIT:@Dubslow my case sucks, so I keep it open :max:[/QUOTE]

As do I, but mostly for "it's fun to look at" reasons than cooling reasons :smile: (though of course the latter is a welcome benefit).