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Safe to use 32 or 64 GB of RAM with Resolve9 on a 2010 Mac Pro?

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Mel Matsuoka
Safe to use 32 or 64 GB of RAM with Resolve9 on a 2010 Mac Pro?
on Jun 21, 2013 at 8:41:03 pm

I know that in the past, BMD recommended against configuring Mac Pro Resolve systems with 32GB of RAM, so I am currently still running with 24GB of RAM on my Resolve system. But I am finding that 24GB is just not enough RAM when I use After Effects, so I'd like to bump up the system RAM to either 32 or 64GB of RAM.

I noticed that the Oct 2012 Configuration Guide no longer specifically mentions the 24/32GB RAM recommendation, so am I correct in assuming that it's now OK to be running 32 or 64GB of RAM with Resolve 9.1.4?



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Eric Hansen
Re: Safe to use 32 or 64 GB of RAM with Resolve9 on a 2010 Mac Pro?
on Jun 21, 2013 at 9:45:21 pm

why did BMD recommend against 32GB of RAM??

my 2 main Resolve Mac Pros have 40GB and 52GB with no issues.

e

Eric Hansen
Production Workflow Designer / Consultant / Colorist / DIT
http://www.erichansen.tv


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Mel Matsuoka
Re: Safe to use 32 or 64 GB of RAM with Resolve9 on a 2010 Mac Pro?
on Jun 21, 2013 at 10:11:35 pm

[Eric Hansen] "why did BMD recommend against 32GB of RAM?"

If I recall, it was a memory bandwidth/timing issue that affected performance in Resolve 8 (when it wasn't a 64-bit app).



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Margus Voll
Re: Safe to use 32 or 64 GB of RAM with Resolve9 on a 2010 Mac Pro?
on Jun 22, 2013 at 7:17:21 am

And probably os limitations also combined with ver 8.

--

Margus

http://iconstudios.eu
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DaVinci 9, OSX 10.7.4
MacPro 5.1 2x2,93 24GB
GTX 470 / Quadro 4000
Multibridge 2 Pro


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Elger Sio
Re: Safe to use 32 or 64 GB of RAM with Resolve9 on a 2010 Mac Pro?
on Jun 22, 2013 at 11:36:54 pm

It's a memory thingie

The Mac Pro has only three memory channels per CPU but it has 4 physical slots, slot 3 & 4 share one channel.
When installing 4 modules (per CPU) in the Mac Pro it falls back to the slightly 'slower' dual channel mode.
Installing 6 (dual CPU) of the same modules your memory will operate in 'tripple channel' and perform the best.

Elger


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Eric Hansen
Re: Safe to use 32 or 64 GB of RAM with Resolve9 on a 2010 Mac Pro?
on Jun 24, 2013 at 3:56:22 pm

I may be wrong here, but wasn't the speed difference almost negligible?

thinking about an app like After Effects, having 32GB of RAM is way more important than having 24GB running slightly faster. when using After Effects, I wish I had way more than the 40GB I have now.

e

Eric Hansen
Production Workflow Designer / Consultant / Colorist / DIT
http://www.erichansen.tv


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Peter Chamberlain
Re: Safe to use 32 or 64 GB of RAM with Resolve9 on a 2010 Mac Pro?
on Jun 25, 2013 at 1:31:08 am

Elger Sio is correct and this was a key consideration in earlier Macs and earlier versions of Resolve. Its less of an issue now. Remember the 2008 MacPro need a 4Ch config and when the '09 came out we were still a 32 bit app so getting high speed access to the 3Ch memory was important.

I doubt you will encounter any issue running 64GB on the new OS and Resolve 9.
Peter


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Peter Chamberlain
Re: Safe to use 32 or 64 GB of RAM with Resolve9 on a 2010 Mac Pro?
on Jun 26, 2013 at 12:48:56 am

Update, my mistake, I'm reliably informed the 2008 was dual channel, not 4ch. And while memory bandwidth is still important with our 64 bit app, you will likely be fine with the current OS and Rv9.
Peter


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