Re: OT: Which MacBook Pro to buy
Re: OT: Which MacBook Pro to buy
- Subject: Re: OT: Which MacBook Pro to buy
- From: Thomas Davie <email@hidden>
- Date: Sun, 18 Jan 2009 19:11:27 +0100
On 18 Jan 2009, at 18:56, Clark Cox wrote:
On Sun, Jan 18, 2009 at 7:21 AM, Chris Jones
<email@hidden> wrote:
Hi,
Not really answering, but it's my understanding that the
limitation to 4GB
is not really a hardware one for the 15". I've even heard of 6GB
upgrade
currently available and demonstrated... I might be wrong though.
Yes, I've read the same reports and would tend to agree and likely a
software constraint. What matters is the kernel and in OSX 10.5
this is
still 32bit.
The kernel can already access more than 4 GB of memory and has been
able to for a while (the PowerMac G5 supported up to 8 GB years ago,
and the current MacPros support up to 32 GB).
It does seem somewhat strange then that the 15" MacBook Pros don't
support 8GB. The fact that people have succeeded in using 8GB,
including writing and reading to all the high-4GB really suggests that
the limit is entirely artificial, that somewhere this code exists:
if (isMacBookPro15Inch() && installedRam == 8GB) { usableRam = 4GB; }
Bob
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