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Support for unlicensed users => Post here if you can't find your License Key => Topic started by: robtodd on February 17, 2013, 05:51:49 pm

Title: GPU - what is more important on calculation power: single or double precision?
Post by: robtodd on February 17, 2013, 05:51:49 pm
a little bit of a nerdy question:

Of course this is some kind of bying advice.. but since i have a limited budget and targeting a second hand buy, i would like to know what kind of focus i should have.
As an example AMD change from the 6XXX to 7XXX a lot of .. a near 4:1 drop on double precision GFLOP power...

(the passmark benchmark is just one synthetic .. and a lot of OpenCL / GPU benchmarks scale different)

hope for an answer, greetings 
Title: Re: GPU - what is more important on calculation power: single or double precision?
Post by: Michael Betke on February 17, 2013, 08:37:09 pm
Lumion is the same as a game engine (dx9).
So it doesn't use double precision or sp like if it would do a classical GPU renderer.

Just buy the fastest gaming card and it should work. ;)
Title: Re: GPU - what is more important on calculation power: single or double precision?
Post by: Morten on February 18, 2013, 12:56:40 pm
There's more advice here (http://lumion3d.com/forum/f-a-q/lumion-2-minimum-hardware-requirements/).