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Old 09-17-2015, 12:07 AM
Logichead Logichead is offline
Join Date: Mar 2004
Posts: 435
Default Upgrading 8 Cores To 12 Cores

Just thought I'd share some of my experiences upgrading my 2.26 8 core to a 3.46 12 core. I also upgraded to 32 gigs of the faster ram from 14 gigs of slower ram.

Mountain Lion on SSD, HD6 Accel (PCIx), ProTools 10.3.8, UAD Octo and Quad PCIe, Quad Satellite, 40 fader D-Command.

I had a bit of a time setting the pb engine. No matter what settings I used, the cpu meter in ProTools was jumpy. I finally realized I needed to adjust the UAD cards to have the extra buffer turned on. Once that was done the jumpy cpu meter settled down quite a bit. I'm still playing with the pb settings, but 512 buffer and 5 processors at 95% seem to be working best. The meters are still somewhat jumpy at the 256 buffer setting.

The additional UAD buffer setting did cause some delay compensation issues for the Lexicon PCM reverb - delay couldn't be compensated on higher buffer settings.

I'm a little concerned that the 3.46 processors were never actually offered in a Mac, but so far so good. For about a grand, I've doubled the Geekbench score of my Mac Pro and (hopefully) extended it's usefullness for a few more years.

I'm interested in anyone else's upgrade experiences.


Last edited by Logichead; 10-11-2015 at 12:33 AM.
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Old 09-24-2015, 11:13 PM
Barry Johns Barry Johns is offline
Join Date: Dec 2002
Location: Orlando, FL
Posts: 3,565
Default Re: Upgrading 8 Cores To 12 Cores

You are probably confusing people by using the term PowerMac as those are the old IBM based G5's. I also recently upgraded my 2009 8 Core to a 12 Core Mac Pro, GeekBench Scores over 30k!!!!
HD Native Pcie, PTHD 11, PT12 Vanilla, Omni, Lynx Aurora 16, 192 I/O (16 in/8 out), 24 Fader D-Command, lots of preamps and compressors.

MacPro 5.1 (12) Core (2009 MacPro 8 Core Upgraded to a 12 Core MacPro), 56 Gig Ram, SSD System & 3 - 2TB Drives, OSX 10.9.5, Windows 10 Via Bootcamp
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Old 10-11-2015, 12:32 AM
Logichead Logichead is offline
Join Date: Mar 2004
Posts: 435
Default Re: Upgrading 8 Cores To 12 Cores

Oops, duh! (Fixed)

I am running into a (hopefully) non serious issue - my CPU clip meter is showing 1% clipping, on and off, throughout my sessions. I don't hear any problems but I am wondering if using a processor that Apple never sold could be a problem.

Anyone have any insight? I don't recall ever seeing this meter doing anything, certainly doesn't on my MacBook Pro.

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