On 17 Jul, 16:01, cashcrea...@googlemail.com wrote:
> I'm considering using a 2.5" 7,200RPM as a primary C: drive for the OS
> + applications, would it run as fast as a 3.5" 7,2000RPM? i.e. latency
> and throughput. I'm aware it's more expensive per GB but that doesn't
> affect since it's only for the OS installation and not for massive
> storage space. Would I be correct it that it would use less power and
> generate less heat also?
It would use Much less power.
I don't know if there are other factors that affect heat production,
but power is certainly THE factor.
(this is especially obvious for processors, where low power processors
can use *little* passive i.e. fanless, heatsinks)
you can get power plugs / energy monitor / metre plugs or whatever you
call them , and SEE exactly how many watts your devices use.
(if you ever used a USB-IDE adaptor, you would know that you can power
an "internal" drive up independently, run a cable from it to the
wall).
You don't even really need to look at a specification. Look at some
drives themselves. they say on the front. If you haven't bought the
drive yet, then you may want to check the specification to be sure,
incase it is a weird exception of some kind. I am not aware of
exceptions though
There is variation amongst 2.5" drives, and variation amongst 3.5"
drives. But the difference between 2.5" and 3.5" is huge.
Hitachi 2.5" drive 5V *0.5A That is 2.5W !!!!!
Now, that may be an underestimate, and it may be that at full powre
that drive is somewhat more.
I have another 2.5" drive, rather thick and old. 5V*0.7A. 3.5W
Not much more.
Compare that with 3.5"
(And by the way. I Have seen 3.5" drives on my energy plug thing, they
are monstrous in comparison to 2.5")
Remember. They use 12V and 5V
Here is one
5V *0.92A
12V*0.9A
That's approcximately 5W+12W, which is 17W.
And I think that's an underestimate. The 3.5" drives I have seen do
more than their advertised watts. Like 40W even! When they advertise
like 17W.
Now look at 2 CD Drives. I find CD drives might overestimate..
But that is not important. Just look at the difference between 3.5"
and 2.5"
My 3.5" CD drive says
5V 1.5A
12V 2A
That's 31.5W
You know when they make a shitload of noise? That's when they are
going on full watts!!
My 2.5" CD drive Actually, it's not 2.5" but to be specific, it's for
2.5" IDE. Actually. Most are, but this one has a 3.5" IDE. I have no
idea about this one! The one I have in mind is upstairs, I won't go to
check it now.
But I can tell you that slim IDE / slimIDE (which I think is 2.5"
IDE, same thing), those drives, use just 5V, and just like the 2.5"
hard drives(also just 5V). They are far lower watt.
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