I installed vray1.5 sp2 for 3dsmax 2009 on a 16core workstation
(4xopteron 8360 - 16x2,50GHz)
The result is horrible!
The Worstation is too slow.
In comparison with my older worstations is the rendertime twice-triply so much!
(2xQuad Xeon 5345 - 8x2,33GHz)
I tested more vray scene.
Has anybody experience with the new AMD opterons?
Yep, there seems to be some issue there. We are unsure whether this is a software or a hardware problem (although it appears to be more likely related to memory bandwidth). I would suggest to run several different benchmarks (not necessarily with V-Ray or 3ds Max).
From the 32-core hardware that we had access to, scaling from 8 to 16 cores was good, but beyond that things didn’t really improve much. It depends on a lot of things though, I guess.
Best regards,
Vlado
Thanks Vlado,
the system is 64-bit, with 24GB RAM.
I try to find the Problem.
hori
Im not an expert on AMD, personally I would never go with AMD because it has way too many issues, I would suggest to pick around the bios…perhaps a setting there could be at fault for slow performance.
Also updating bios could solve the problem.
Hi there. I dont know if I can help, but I had a similar problem when I bought my intel 5355’s. I had 2 quad core cpus and they were a lot slower than my single quad core. I found out that the snoop setting in the bios can cause major performance issues if turned on. Maybe you need to turn that off and test again.
Good luck 
thanx,
I updated the chipset driver and tryed several settings.
Bios is new too.
Everithing looks ok. But the Workstation is slow.
hori
Did you try changing the snoop setting ?
Not yet.
I try it. thanx.
No snoop setting found in the BIOS.
2 hori : what kind of mobo are you using ? i got tyan s 4985-E and (4 soc ) and got no problem with speed only with amount of memory sticks.
btw : barcelona core is not the best i am waiting for shanghai 45 nm core but 16 core MUST be better that 8 core at the same speed ofcourse. ( amd vs intel )
i can do some test on max scene if you want :-)…
it was a hardwareproblem: the processors had a bug
I have today the pc with new processors and the system is ok!
4x opteron 8356 (16 x 2,3GHz)
the pc is now 30-40% faster as a dual xeon E5345 (8 x 2,33GHz)
but the pc is more expensive, as a xeon
2 Janosik: thanx. I would like to compare with an other 16core system. there is a new benchmarkscene?
2hori : no new test scene AFAIK but you can use last one or you can try cinemabench for testing too …
BTW : what kind of bug was at cpu ? coz if you mean tlb bug on last barcelonas core there was nothing to fear , only in bios was disabled something and that lowered final power of cpus …
2Janosik: The cpus were Stepping B2. Now I have cpus with Stepping B3.
The benchscene 3dspeedmachine.com
run the workstation in 1:45 Min
I try some other benchs.
Witch prosessors you have?
2hori : in my case there are opterons 8216 ( 2,4 ghz ) so only dual core ones right now , as i said i am waiting for new 45 nm cores named Shanghai or for very low priced barcelonas cores ( dreaming ) so for now got only 8 cores …
btw : what kind of mobo do you have ? got intel machine too and there is time around 2:46 for 8 cores 2,33 ghz .
I have the tyan S4980
I don´t know when shanghai comes.
The Opteron 8346 cost approx. 1000$
i give here my render time from my 16 core amd machine and its very simillar to your time is : 1:47 min heh but with other vray test scene is with teapots in “museum” is time gain really not visiable so where is the problem … ?
http://www.cpubenchmark.net/multi\_cpu.html
I see a similar setup there, an 8 way quad core 8354 opteron, perhaps run the same test as used there to see how it performsand compares. What kind of system is that 4 cpu socket computer, is that a boxx?
About buying a new workstation, those lower end 55xx nehalems are really the bang for the buck right now, such has the 2.27Ghz.
Cheers
not bad in cpu operation got intel 2 x 5410 too and ita averagely half of amd machine performance in multitread operation ofcourse … problem is somewhere in vray i think …
if thats the case, a good idea would be to test with another render such as mr and see if there is any difference.
2morbid angel : yea i tried with maxwell bench , nice scaling , mr i can try too , will refer …