Speed Difference from old MacPro1.1 to current versions?

[Steve Nunez]

Hey guys, I have an older MacPro desktop with this specification: Processor 2 x 2.66 GHz Dual-Core Intel Xeon...........when compared to the newest MacPro which features: 3.2 GHz Quad-Core Intel Xeon W3565 processor, (Turbo Boost dynamic performance up to 3.46 GHz, 8 MB of fully shared L3 cache per processor
Hyper-Threading technology for up to 8 virtual cores) what sort of speed differential could I expect when rendering video?

I primarily work with GH3 72mbps video as well as AVCHD and would like to know what sort of speed increase I could expect from such a machine upgrade?

Thanks Mac Pro guys~

Steve
(Note: this is the Mac I'd like to purchase but only if speed increase is rather substantial; http://www.bhphotovideo.com/c/product/871876-REG/Apple_MD770LL_A_MACPRO_QC_XEONPROCESS_3_2g_6GB_1TB.html )

[Shaun Roemich]

Mountain Lion is not RECOMMENDED for running FCP7 although many report it working just fine. I have read a lot of reports of the other software in the Suite not working at all though.

Of course, YMMV.

[William Hohauser]

A reasonable speed increase in FCP7 but you might not find the expense worth it. The real rendering improvement comes with moving to FCPX especially if you are working with GH3 AVCHD files. But even there the MacPros are not as efficient right now as the new iMacs or MacbookPros due to the older hardware architecture in the MacPro line. Converting your GH3 files to ProRes and purchasing more hard drives would be a better way to invest until Apple finally delivers the new MacPro (which is entirely dependent on Intel releasing their new CPU chips) later this year. An iMac is not a bad choice at this point in time if it fits your workflow.

I use FCP7 with Mountain Lion on my 2009 MacPro and my 17" MacbookPro without any major issues aside from random disappearing audio waveform previews.