Linked by Thom Holwerda on Sun 15th Apr 2007 21:10 UTC
Apple During a special event at the National Association of Broadcasters conference today, Apple introduced some new products. They introduced Final Cut Server and Final Cut Studio 2. "Final Cut Studio 2 puts a powerful new version of Final Cut Pro at the center of an integrated post-production workflow. Final Cut Pro 6, Motion 3, Soundtrack Pro 2, Compressor 3, DVD Studio Pro 4, and Color - a brand-new application for professional color grading - are all included in Final Cut Studio for USD 1299."
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CrimsonScythe
Member since:
2005-07-10

No, it's not an Apple-exclusive limit. The Intel 945 chipset only supports 32-bit addressing, which does allow for up to "4 GB of memory". What they don't mention, is that addressing of other hardware is also done in the same address space. The result is that you'll end up with only 3.2-3.4 GB of memory, depending on the computer you're using. This is the same for Dell, HP, etc. (Note, that the OS will report 4 GB, but will not be able to use all of it.) This limit will disappear when the addressing space is expanded from 32 bits to 64 bits.

Reply Parent Score: 2

tyrione Member since:
2005-11-21

No, it's not an Apple-exclusive limit. The Intel 945 chipset only supports 32-bit addressing, which does allow for up to "4 GB of memory". What they don't mention, is that addressing of other hardware is also done in the same address space. The result is that you'll end up with only 3.2-3.4 GB of memory, depending on the computer you're using. This is the same for Dell, HP, etc. (Note, that the OS will report 4 GB, but will not be able to use all of it.) This limit will disappear when the addressing space is expanded from 32 bits to 64 bits.

Intel's information is quite interesting on this [Note: I've got an Asus V2-PH1 with 4 Gigs of DDR2-667 PC5300 which the bios preallocates 896MB for itself leaving me with 3.06 GB on Linux 2.6.20]:

From http://www.intel.com/products/chipsets/945g/index.htm

Delivers up to 10.7 GB/s of bandwidth and 4 GB memory addressability for faster system responsiveness and support of 64-bit computing.


The G965 Chipset:
http://www.intel.com/products/chipsets/G965/index.htm

It says,

Delivers up to 12.8 GB/s of bandwidth and 8 GB memory addressability for faster system responsiveness and support of 64-bit computing.


Dilemma: Dual Channel is installed in pairs and thus with 4 banks going from 4 Gigs to 8 Gigs leaves one to imagine how much more memory the BIOS will preallocate to itself that is not available for the OS.

Now I'm more interested in knowing if this is a legacy BIOS [early implementations of EFI] that varies with how much preallocated memory the system holds to account for registry sharing or not.

Reply Parent Score: 2

CrimsonScythe Member since:
2005-07-10

With 33 bits, you could address 8 GB of memory. G965 has 64 bits, which means that they have 31 bits to use for the rest of the hardware, so you would not have any such limitations anymore. In fact, with 64 bits you could address 16 exabytes, so we'll do just fine for a while... ;-)

I would think the current situation depends on both the hardware and BIOS implementations.

Reply Parent Score: 2