Speed is only half of the issue here. An HD (or higher) render will take a lot of memory and can very well crash your GPU rendering if not using tiles. What works for a couple models is not what works for a complete scene!<div>
<br clear="all">Daniel Salazar<br><a href="http://patazstudio.com" target="_blank">patazstudio.com</a><br>
<br><br><div class="gmail_quote">On Wed, Nov 7, 2012 at 6:15 PM, Cal McGaugh <span dir="ltr"><<a href="mailto:cal@cal3d.com" target="_blank">cal@cal3d.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Hi Adriano,
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very interesting..........no wonder I'm seeing longer renders with 2.64 vs 2.63.
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Will do more tests with different versions. Just got a new (used) Zotac GTX580
<br>and will test different tile settings.
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Thanks,
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Cal
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<br>On November 7, 2012 at 7:02 PM Adriano Oliveira <<a href="mailto:adriano.ufrb@gmail.com" target="_blank">adriano.ufrb@gmail.com</a>> wrote:
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<p style="margin-bottom:0.0001pt"><span style="font-size:12pt;font-family:Arial,sans-serif">Hi,</span></p>
<p style="margin-bottom:0.0001pt"><span style="font-family:Arial,sans-serif;font-size:12pt">Subdividing render image in tiles has very inconsistent behavior in CPU and GPU: more tiles are good for CPU, BUT less are better for GPU.</span></p>
<p style="margin-bottom:0.0001pt"><span style="font-family:Arial,sans-serif;font-size:12pt">With my i7, 8x8 is ok. With my GTX 560 Ti, 1x1 is the best. With another dual GTX 590 system, I've found 3x3 to be fastest...</span></p>
<p style="margin-bottom:0.0001pt"><span style="font-family:Arial,sans-serif;font-size:12pt">Problem: with 8x8 as default, non-advised GPU users are experiencing longer render times.</span></p>
<p style="margin-bottom:0.0001pt"><span style="font-family:Arial,sans-serif;font-size:12pt">In last builds, tiles became pixel based, what is not good for GPU users, as long as we should now set it up for equal image size and this can change a lot for preview. And as strange as it gets, I’ve found that tile size of 1920x1080 is fast even for a 960x540 render…</span></p>
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<p style="margin-bottom:0.0001pt"><span style="font-size:12pt;font-family:Arial,sans-serif">I think this is getting messy.</span></p>
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Adriano A. Oliveira
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