On Jul 28, 05 19:29:19 +0200, Roland Scheidegger wrote: > >R200 did not really have pixel shaders. They had a configurable pixel > > pipeline, that's different. Comparable to GeForce2, a little bit > >better. > Looks better to me than GeForce3/4, really, if only for the dependant > texture read. You nowadays indeed have (directx) games which have PS 1.4 > (thus r200) as minimum, but won't work on GF3/4.
GeForce3 didn't improve much here compared to GeForce2. You could have dependant texture read in GeForce3 as well (NV_texture_shader), but I think that the later R2xx were a little bit more flexible. > >The GeForce3 had 3D textures (except for an early sample we had at > >Unversity :-/ ), and IIRC this was before the Radeon7500. > If the Radeon7500 has it, the radeon 7200 (radeon sdr/ddr as it was > called) should have it too. And that was certainly way before geforce3. It seems to have it as well. I don't remember the release dates, though. I think I remember, that the OpenGL drivers exposed this feature on the GeForce first. > >Well - sort of. R300 still does not do IEEE computations in its pixel > > shader (I think R400 doesn't either), which gives you crappy results > > for GPGPU applications. > True, but that's not really what these cards are intended for. R300 does > nice fast fp24 calculations, with FX5 you could choose between really > slow fp16 and even slower fp32 :-). Oh or you could choose quite fast > int8... Sort of. Well, fp16 was quite ok. And on FX6 this is really fast now. > >Yep. They used to do good hardware. Have fallen behind a bit compared > > to GeForce6, but not much. > Well, r520 should do fp32, longer shaders and what not. The chip's late > though, we'll see. > (is it only me or is this all "slightly" offtopic?) Yep, let's end it now :^) Matthias -- Matthias Hopf <[EMAIL PROTECTED]> __ __ __ Maxfeldstr. 5 / 90409 Nuernberg (_ | | (_ |__ [EMAIL PROTECTED] Phone +49-911-74053-715 __) |_| __) |__ labs www.mshopf.de ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
