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Craig Seeman
Barefeats tests new Sapphire Radeon HD 7950 in MacPro
on Mar 19, 2013 at 9:30:16 pm

Barefeats tests new Sapphire Radeon HD 7950 in MacPro
http://barefeats.com/gpu7950.html

What I find intriguing is that in the Motion 5 Render Preview tests, not only does the BTO 27" iMac's GTX 680MX outperform it, so does the ancient Radeon 5770 and the GTX 285.

In Resolve 9 though the 7950 beats everything but the GTX 680MX is reasonably close.



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John Davidson
Re: Barefeats tests new Sapphire Radeon HD 7950 in MacPro
on Mar 19, 2013 at 9:49:27 pm

Feeling pretty good about ordering another 27 imac an hour ago.

John Davidson | President / Creative Director | Magic Feather Inc.


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Lance Bachelder
Re: Barefeats tests new Sapphire Radeon HD 7950 in MacPro
on Mar 19, 2013 at 11:01:37 pm

Love my GTX680 iMac! Photoshop raytrace renders are 3 times faster than my GTX570 all SSD PC!

Lance Bachelder
Writer, Editor, Director
Downtown Long Beach, California
http://www.imdb.com/name/nm1680680/?ref_=fn_al_nm_1


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Rick Lang
Re: Barefeats tests new Sapphire Radeon HD 7950 in MacPro
on Mar 20, 2013 at 6:39:37 pm

Solely based on the Resolve 9 tests with three nodes, it looks like the tricked-out iMac can support 24-30 fps of CinemaDNG raw from the Blackmagic Cinema Camera. The CinemaDNG raw is 2400x1350 compared to HD 1980x1080 or about 1.5x the effort to process compared to HD. I believe I read a post recently from someone who said they were getting realtime playback of 24fps for CinemaDNG, but these benchmark tests appear to support that in a controlled test.

Rick Lang

iMac 27” 2.8GHz i7 16GB


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Rick Lang
Re: Barefeats tests new Sapphire Radeon HD 7950 in MacPro
on Mar 20, 2013 at 6:41:37 pm

Pardon my typo, of course HD is 1920x1080.

Rick Lang

iMac 27” 2.8GHz i7 16GB


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Don Eitner
Re: Barefeats tests new Sapphire Radeon HD 7950 in MacPro
on Mar 20, 2013 at 12:01:59 am

Does anyone have any thoughts (preferably insight) on why the 7950 is so much slower than the 5770 with Motion 5? Could it be as simple as an immature driver in 10.8.3 which might get better in 10.8.4?


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Craig Seeman
Re: Barefeats tests new Sapphire Radeon HD 7950 in MacPro
on Mar 20, 2013 at 12:24:18 am

My uninformed nefarious thought is that Apple doesn't want you to buy the 7950 for the ancient MacPros. The upcoming new MacPro, that they will want you to buy, will magically release the secret sauce to good performance with Motion.

It is very odd though. I also wonder if anybody can speculate about that.



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Frank Gothmann
Re: Barefeats tests new Sapphire Radeon HD 7950 in MacPro
on Mar 20, 2013 at 12:29:23 pm

Yes, Craig, I am sure that's the reason. What else could it be. Makes perfect sense.

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Thomas Frank
Re: Barefeats tests new Sapphire Radeon HD 7950 in MacPro
on Mar 21, 2013 at 12:12:02 am

[Craig Seeman] "What I find intriguing is that in the Motion 5 Render Preview tests, not only does the BTO 27" iMac's GTX 680MX outperform it, so does the ancient Radeon 5770 and the GTX 285."

The reason for that are the drivers, which are being looked into...

http://www.fcproxuniversity.com/FCPro_X_University/Extra_Credit/Entries/201...



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Craig Seeman
Re: Barefeats tests new Sapphire Radeon HD 7950 in MacPro
on Mar 21, 2013 at 12:31:11 am

Thanks for that update. Interesting how the drivers can do fine with some apps and not others (not related to the kinds of drawing games are doing).

This is pivotal to the value of the MacPro replacements when they happen.



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