chew_b Posted July 25, 2007 Share Posted July 25, 2007 hi, my major problem ist that if i am rendering with vray 1.5rc3 on 3dsmax9 sp2 i only have 30% of cpu ussage all the time. So he needs 5min for one damn frame. My old athlon xp with 2,5GHZ is faster than that. He only needs 25sec for the exactly same frame on 3dsmax 9 with vray 1.5rc3. If i am render with backburner on the quadcore all the prepasses also only uses 30% of the 4 cores. But rendering the image he use all the power up to 100%. So in this setup the quadcore has the same speed as my athlonxp 2,5GHz and pentium M 1,4GHz rendering in network and with 100% cpu ussage. with mental ray i didnt have that problem. Mental ray uses 100% of all cores. Maybe vray 1.5rc3 have problems with the new sevice pack 2 ? What can i do to increase the usage of the 4 cores up to 100% all the time? Is winxp 32bit the problem ? thx chew_b Link to comment Share on other sites More sharing options...
Zdravko Barisic Posted July 31, 2007 Share Posted July 31, 2007 What is the point from those two listed down: -Using 30% ALL THE TIME, or NOT USING 100% ALL THE TIME? During the prepress it uses only ONE core, thats the rule. While LC and bucket works it use all 4 cores. Link to comment Share on other sites More sharing options...
Tyorl Posted July 31, 2007 Share Posted July 31, 2007 I've got the same problem but on my dual quadcore workstation it is under 15% per core, and never mind if it LC with 8 number of passes or irmap with bucket mode. Trying to reset Affinity then it goes to 100% usage but hangs Link to comment Share on other sites More sharing options...
kippu Posted July 31, 2007 Share Posted July 31, 2007 wasnt there a problem with rc3 to use all the cores? Link to comment Share on other sites More sharing options...
chew_b Posted July 31, 2007 Author Share Posted July 31, 2007 I only have the problem if using omni and direct lights with volume light effect with vray. I render now with two 3dsmax at the same time to get the full ussage of the 4 cores. Unfortunately backburner doesn't support two windows at the same time. Link to comment Share on other sites More sharing options...
arqdia Posted December 22, 2008 Share Posted December 22, 2008 i have a similar problem.. hope someona can help my specs: q6600 @3.4gzh 8gb ram ocz 800mhz ati 4870hd 1gb max 2009 vray 1.5 sp1 the thing is.. some scenes render at 100% load, from Light cache, prepasses and final rendering. but with other scenes, the prepasses just load 30% of the cpu. i have no idea why... and i been searching for a while for some answers, and i didnt find any thing.. so please, if someone have a clue, post it. my only clue is displacement related. tnx. Link to comment Share on other sites More sharing options...
ihabkal Posted December 23, 2008 Share Posted December 23, 2008 I also think it is displacment related, dispalcement uses up all ram, so there is enough ram to supply data to one or two cores, and the other cores are witing for the info, but the ram can't keep up with demand. Link to comment Share on other sites More sharing options...
arqdia Posted December 23, 2008 Share Posted December 23, 2008 i have 8gb of ram.. that shold be enough... or not? the scene is using only 3gb of ram so there is almost 60% free ram.. im going mad about this.. i want all the power lol.. it took me a while overclock the cpu... and im thinking to OC even more, but i want to know why this is happening first.. i know this could be an old thread, but please, if you have something to say, that will be usefull.. ill post evry thing i find.. tnx. Link to comment Share on other sites More sharing options...
AFK_Matrix Posted December 23, 2008 Share Posted December 23, 2008 Arqdia I know this might be a silly question but are you using a 64bit OS? If you arn't using a 64bit that 8gb of ram is a total waste as a 32bit OS will only use 3GB. Link to comment Share on other sites More sharing options...
ihabkal Posted December 23, 2008 Share Posted December 23, 2008 And if you are using a lot of proxies, they load at render time and fill up the ram. If during rendeirng with proxies you see the ram still unused, then you should raise the dynamic memory limit in vray to allow it to use the available ram for the proxies which are dynamic geometry. the limit is 400MB only if you never changed it. a couple of proxy cars would fill that low limit. Link to comment Share on other sites More sharing options...
ihabkal Posted December 23, 2008 Share Posted December 23, 2008 oh you mentione 32 bit OS. it won't matter if you have more than 3GB... Time to go the 64bit way to take advantage of your hardware... Link to comment Share on other sites More sharing options...
amer abidi Posted December 23, 2008 Share Posted December 23, 2008 Is winxp 32bit the problem ? thx chew_b YES! Link to comment Share on other sites More sharing options...
arqdia Posted December 23, 2008 Share Posted December 23, 2008 (edited) well there are no silly questions, i forgot to tell i am using vista 64 ultimate, and all memory is recognized. and, yes im using proxies, but not that much, just 2 trees. and i already test a render with a lot more dynamic memory, and still the same problem.. hope you keep with the comments.. i havent found any news jet. but ill be back when i find somthing relevant.. tnx UPDATE: there was a vrayfur objetc in the scene for the grass.. i deleted, and the cpu start using 100% but, i have no grass now.. am i missing something? why using less cpu when you need more? please help. tnx. Edited December 23, 2008 by arqdia update Link to comment Share on other sites More sharing options...
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