16core opteron workstation too slow!

[hori]

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?

[vlado]

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

[hori]

Thanks Vlado,
the system is 64-bit, with 24GB RAM.
I try to find the Problem.

hori

[Morbid Angel]

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.

[stevesideas]

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

[hori]

thanx,
I updated the chipset driver and tryed several settings.
Bios is new too.
Everithing looks ok. But the Workstation is slow.
hori

[stevesideas]

Did you try changing the snoop setting ?

[hori]

Not yet.
I try it. thanx.

[hori]

No snoop setting found in the BIOS.

[Janosik]

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 ......

[hori]

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?

[Janosik]

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 ....

[hori]

2Janosik: The cpus were Stepping B2. Now I have cpus with Stepping B3.
The benchscene http://www.3dspeedmachine.com/?page=3
run the workstation in 1:45 Min
I try some other benchs.
Witch prosessors you have?

[Janosik]

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 .

[hori]

I have the tyan S4980
I don´t know when shanghai comes.
The Opteron 8346 cost approx. 1000$