vray and dual-quad core xeon

[rbaz]

Hello Intrinsia,

We have just purchased 2 Dual Quad-cores and the first one we have tested is running slower than our Dual-cores on most jobs. I take it you have not experienced anything like this?

RB

We have a dual quad core and it works beautifully with Vray. Haven't encountered any problems yet.

[jacksc02]

for some things the dual quads will be slower due to the slower clock speeds.

[rbaz]

Well I understand that anything single threaded should run slower but I am talking during actual rendering. Some scenes render as slow as our older dual socket single core Xeons from 3 years ago. At those times, all 8 cores appear to be working equally but sometimes running as low as 14% capacity each. Other times, mostly with very simple scenes, they peg at 100% and we get about a 30-50% speed advantage over our dual dual-cores (5160s). Unfortunately, these very simple scenes are rare.

I'm very close to sending these back to Dell and replacing them with Dual 5160s and a slightly better video card which would probably benefit us more as these are workstations first, render nodes only at night.

[jacksc02]

are you using dynamic memory?

[rbaz]

I'll have to check. I'm not doing the animation, just trying to make sure the guys have the right tools. What is the impact of using dynamic memory or not when rendering on the quads?

[jacksc02]

huge, it will limit the ammount of memory the render can use.
Our dual cores render fine with 1600mb of dynamic memory and the dual quads are best on static.

[rbaz]

Thanks for that tip. I'll check tomorrow which way they are sending the renders out and try static if it isn't that way now.

Cheers,

RB

[sjmoir]

We have one dual quad core, we love it. It does about 200 frames for every 50 our dual dual cores do.

[rbaz]

Are you doing anything special like running XP64 or watching static vs. dynamic memory such as jacksc02 mentioned? (BTW, I just heard from one of my animatos and he said they are using static memory for all these scenes).

Are ALL your scenes rendering faster on the Quad?

BTW, is your Quad a single processor(socket) or dual processor machine?

We have one dual quad core, we love it. It does about 200 frames for every 50 our dual dual cores do.

[jujubee]

We have just purchased 2 Dual Quad-cores and the first one we have tested is running slower than our Dual-cores on most jobs. I take it you have not experienced anything like this?

Make sure under lightcache your 'Number of passes' is set to 4.

[rbaz]

Out of curiosity, how does that effect the quad-core chips?

We have just purchased 2 Dual Quad-cores and the first one we have tested is running slower than our Dual-cores on most jobs. I take it you have not experienced anything like this?

Make sure under lightcache your 'Number of passes' is set to 4.

[RErender]

Yeah, farms with 2x Quads should have it set to 8