Prev: iOS4 Windows'ism
Next: Has iOS 4 removed support for Ad-hoc Wi-fi networks?
From: zoara on 26 Jun 2010 19:12
Chris Ridd <chrisridd(a)mac.com> wrote:
> On 2010-06-25 15:19:28 +0100, zoara said:
>
>> Chris Ridd <chrisridd(a)mac.com> wrote:
>>> On 2010-06-23 13:08:09 +0100, Jim said:

>>>> Battery life is supposedly much improved as well. I think Engadget
>>>> reported 38 hours of 'normal' use. Not bad.
>>> That seems slightly outrageous. And/or unlikely!
>> In which direction?
>
> I'd expect a shorter battery life.

Righto.

>> I suspect that Engadget's "normal" use of a smartphone is heavier
> > than
>> average, so I'd expect them to get a lower-than-average figure here.
>
> So would I. But "normal" to me means games, videos, etc and that would
> be *much* harder on the battery.

Ah, I hadn't thought of games. Somehow I get the impression that the
Engadget crew don't play many iPhone games though...


>> But if you think it's too high that might be because you think of the
>> "use" as the time in your hands actually doing something, whereas
> > that
>> figure is actually from the time they took it off the charger to the
>> time it died - ie with plenty of standby time going on.
>
> Maybe the A4 chip really is that good?

Heh.

The iFixit crew reckon it's a 1GHz A4, the same as the iPad. But the die
is about a quarter of the size, isn't it? I'm dubious about that, TBH.

-z-

--
email: nettid1 at fastmail dot fm
From: Jaimie Vandenbergh on 27 Jun 2010 05:31
On 26 Jun 2010 23:12:48 GMT, zoara <me18(a)privacy.net> wrote:

>The iFixit crew reckon it's a 1GHz A4, the same as the iPad. But the die
>is about a quarter of the size, isn't it? I'm dubious about that, TBH.

Can't find it now, but I saw reference to some benchmarking results
that put the iPhone4 at about 80% of the CPU speed of the iPad.

Die size is largely irrelevant - at most it affects the size of the
solder pads and heat dissipation. With the memory being onboard the A4
package and the power consumption being so low there's a lot fewer
pads than your average computer CPU.

Cheers - Jaimie
--
Actually, the Singularity seems rather useful in the entire work avoidance
field. "I _could_ write up that report now but if I put it off, I may well
become a weakly godlike entity, at which point not only will I be able to
type faster but my comments will be more on-target." - James Nicoll
From: zoara on 28 Jun 2010 12:01
Jaimie Vandenbergh <jaimie(a)sometimes.sessile.org> wrote:
> On 26 Jun 2010 23:12:48 GMT, zoara <me18(a)privacy.net> wrote:
>
>> The iFixit crew reckon it's a 1GHz A4, the same as the iPad. But the
> > die
>> is about a quarter of the size, isn't it? I'm dubious about that,
> > TBH.
>
> Can't find it now, but I saw reference to some benchmarking results
> that put the iPhone4 at about 80% of the CPU speed of the iPad.

Woo, nice.

> Die size is largely irrelevant - at most it affects the size of the
> solder pads and heat dissipation. With the memory being onboard the A4
> package and the power consumption being so low there's a lot fewer
> pads than your average computer CPU.

Oh? So why are the die sizes so drastically different between the iPad
and iPhone? Miniaturisation costs - the iPad doesn't need a small die so
we'll save cash by making it bigger? Or something else?

-z-


--
email: nettid1 at fastmail dot fm
From: Jaimie Vandenbergh on 28 Jun 2010 12:09
On 28 Jun 2010 16:01:29 GMT, zoara <me18(a)privacy.net> wrote:

>Jaimie Vandenbergh <jaimie(a)sometimes.sessile.org> wrote:
>> On 26 Jun 2010 23:12:48 GMT, zoara <me18(a)privacy.net> wrote:
>>
>>> The iFixit crew reckon it's a 1GHz A4, the same as the iPad. But the
>> > die
>>> is about a quarter of the size, isn't it? I'm dubious about that,
>> > TBH.
>>
>> Can't find it now, but I saw reference to some benchmarking results
>> that put the iPhone4 at about 80% of the CPU speed of the iPad.
>
>Woo, nice.
>
>> Die size is largely irrelevant - at most it affects the size of the
>> solder pads and heat dissipation. With the memory being onboard the A4
>> package and the power consumption being so low there's a lot fewer
>> pads than your average computer CPU.
>
>Oh? So why are the die sizes so drastically different between the iPad
>and iPhone? Miniaturisation costs - the iPad doesn't need a small die so
>we'll save cash by making it bigger? Or something else?

Guessing: Smaller pad grids are going to be harder to get the solder
flow right, so I expect the iPad is at the nominal best size for best
assembly reliability, while the iPhone is tinky cos it's tiny and has
to be 1cm wide to fit.

Cheers - Jaimie
--
"the first successful time machine will be used to retrieve lost
Doctor Who episode footage." - KKC, ugvm
First  |  Prev  | 
Pages: 1 2 3 4 5 6
Prev: iOS4 Windows'ism
Next: Has iOS 4 removed support for Ad-hoc Wi-fi networks?