maximum cores supported?

Randall_Oelerich

Randall_Oelerich

Veteran
Anybody use more than a quadcore for rendering in Vegas, on a single PC Desktop? I am wondering if Vegas supports more than quadcores; e.g. if I built an octacore PC would that be overkill or would Vegas Pro make use of the eight cores?
 
Found the answer: Sony Vegas Pro 8.1 64 bit can access 16 cores.
Searched in Knowledge-base at Sony Vegas website and found the answer.
I use Windows Vista 64 bit and Sony Vegas Pro 8.1 64 bit, so I might have to look into building an eight core. Six core intel chips are coming in 2010, but dual quad core mobos can be had now to build octacore systems if desired.
 
It will use all you have, but there is a trick....

It will use all you have, but there is a trick....

Apparently the Vegas programming code assumes there will be no more than 4 cores available. So it won't let you specify more than 4. But there is a trick to get it to allow all you have (8 in the case of an Intel i7 processor.)

First you have to tell Vegas there are 8 cores available. Then you tell it to use all 8. The trick is the first part:

1. Click Options
2. Hold down Shift while you click Preferences
3. Notice the Internal tab. The trick was to get Vegas to show this tab. Click Internal.
4. In the Show only... box enter "Threads". This will display 2 lines of preferences.
5. Change the Value field of Maximum Video Render Threads to 8
6. Click OK, close Vegas and re-open it. Then go back to Preferences/Video and you will be able to specify 8 threads.
7. Click OK, close and re-open Vegas and you should be good to go on all 8.
 
Thanks Birk. I had seen this before but forgot about it. Maybe my renders will be faster this week when I can specify 8 cores.
 
This is another one of those tweaks Sony should incorporate directly into the program code. It did make a noticeable difference in my render times. After I made the tweak I'm getting render times = 4X real time (more or less) for full HD with 5.1 surround sound. This is with an i7 920 (2.67GHz) 6GB RAM and rendering onto a 2nd SATA 1TB drive.

It would be interesting to see various people's render time ratios based on the hardware they have. I've seen reports of everything from 12X to 2X, so I'm reasonable happy with my 4X.
 
That 8-core trick caused more instability for me, so be careful. the one option I found delightful in the hidden menu was being able to increase the dynamic ram value past its 1gb limit up to 3.72gb in a 32 bit installation.
 
a quick question guys, if im overclocking my i7, with the results shown above here ,would you guys say its better to leave hyperthreading on and not turn it off?
Efexone, if im runing win 7 64bit with 6gb ram,what would you say is best value for the trick you just posted for better performance?thanks!
 
sammysammy said:
a quick question guys, if im overclocking my i7, with the results shown above here ,would you guys say its better to leave hyperthreading on and not turn it off?
Efexone, if im runing win 7 64bit with 6gb ram,what would you say is best value for the trick you just posted for better performance?thanks!
Click to expand...

the best "trick" is to get vegas 9c x64, which natively supports up to 16 cores and as much ram as you can afford, plus its relativity stable.

to answer your question, unless your running vegas 8.1 x64, 32 bit vegas cant handle more then 3.72GB. I would also leave HT on, since it doubles your threads, allowing your processor to be more effective at rendering.
 
is it the same idea that randall posted for the threads? just change the value of max ram> or is it something else outside vegas?
 
You must log in or register to reply here.
Back
Top