Bread <> wrote:
> On 2012-06-13 14:36:58 +0000, Michelle Steiner said:
>
> > In article <>,
> > Martin Frost me at invalid stanford daht edu
> > <> wrote:
> >
> >> I haven't notice much (or any?) discussion of the fact that the new
> >> "retina display" MBP models come with an SSD (or as Apple calls it
> >> "Flash storage").
> >
> > They're available (in various sizes) on the regular MacBook Pros, where
> > they are called Solid State Drives.
>
> On the regular MBPs, the drive bay and connector is a standard SATA
> 2.5" bay and there are a variety of standard third-party sources for
> replacement hard drives as well as SSDs.
>
> On the MacBookAir -- and on the new Retina MBP -- it's non-standard.
> As far as I know, the only ones making replacement SSD drives for them
> is Other World Computing.
The 2012 models have a different connector, so OWC's existing MacBook
Air SSDs will only work on the 2010 and 2011 series.
> Here's their blog post regarding the new RetinaMBP:
>
> http://blog.macsales.com/14090-not-a...ook-pro-w-reti
> na-display
>
>
> More distressing than the non-standard SSD/HD bay is the fact that the
> RAM is soldered onto the motherboard. Whatever amount of RAM comes in
> your MBA or RMBP, that's all the RAM that machine will ever have. If
> you're debating paying up for more RAM vs. more SSD space on one of
> those machines, get the more RAM.
Agreed. A friend ordered one quickly, but I managed to warn him about
the soldered in RAM before he placed the order, so he went with 16 GB.
If I was getting one I'd probably go with 16 GB even though it would be
overkill now, as I expect I would be making good use of it later in the
lifetime of this computer. I upgraded my mid 2010 MacBook Pro from 4 to
8 once the memory prices got cheap enough and it makes a big difference
when using things like virtual machines.
I'm most interested in having at least 500 GB of internal storage. At
present that would mean getting the high end model as you can't do a
storage upgrade in the cheaper model, so I'd be looking at the expensive
model with the US$200 RAM upgrade.
I'm perfectly happy with my current MacBook Pro, so I'll pass on this
model and see how things pan out with next year's refreshes. I expect
SSD prices will come down by then.
The other factor holding me back is 802.11ac and 802.11ad, which are
likely to be coming in the next year or two. The iFixit teardown of the
Retina MacBook Pro confirms it has an 802.11n chip, so Apple hasn't
included "yet to be revealed" draft 802.11ac in this model.
I'd be irritated not have 802.11ac in my main computer for a few years,
and would prefer to wait long enough to get 802.11ad as well.
(802.11ac is the next WiFi generation after 802.11n, operating on 5 GHz
with potential speeds exceeding 1 Gbps. 802.11ad operates on 60 GHz and
is for short range very high speed transfers up to about 7 Gbps.)
> OTOH, with the speed of the SSDs, apparently the need for extra RAM is
> diminished by the speed of swapping - all Macs use some of the space on
> the boot hard drive as extra virtual memory - since the SSDs are so
> fast, the speed of that virtual memory is very much higher than the
> speed of using regular hard drive space would have been. The
> responsiveness of a Mac running off an SSD - even with less real RAM -
> is amazingly faster than similar on a Mac running off a regular HD.
> I'd still get as much RAM as possible and worry about upgrading the SSD
> later on.
The major improvement in VM performance with an SSD is due to the
elimination of delays for head movement.
Even with the faster SSDs, they still only read at 500 MB per second,
probably slower for write, which is in the order of four times faster
than a spinning hard drive. The RAM can transfer up to 12.8 GB per
second (25 times faster again).
--
David Empson