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From: - Bobb - on 5 May 2008 09:50

"BillW50" <BillW50(a)aol.kom> wrote in message
news:481deb9e$0$6432$834e42db(a)reader.greatnowhere.com...
> In news:C-KdnX69QeBifYDVnZ2dnUVZ_sOrnZ2d(a)comcast.com,
> Hula Baloo typed on Sun, 4 May 2008 12:14:57 -0400:
<snipped>
>>Sitting in my lap, I doubt if the air flow is
>> optimal, but the power supply fan never seems to be running very fast
>> nor its output all that hot (it's pretty warm air, but you can hold
>> your hand next to it as long as you want without discomfort). Any
>> feedback about the need for a laptop cooler would be highly
>> appreciated. TIA
>
> I never owned a laptop yet that gets very hot at all except my Toshiba
> laptops. And the only ones I owned was from the 90's and none of them
> had vents on the bottom. So those laptop fans probably won't do much for
> those anyway. So I don't think much of those fans anyway. > --
> Bill
I've had a few laptops with 'no vents on the bottom' yet the antec coolers
work fine. Even though no DIRECT air blowing in/out of bottom vent, it
still 'surrounds the bottom of the case with cool air' and dissipates the
heat. Usually the bottom of the motherboard/case is one big heat sink for
the processor and better to cool it than not.
http://www.antec.com/us/productDetails.php?ProdID=75004#
http://www.antec.com/pdf/flyers/NoteBookCooler.pdf

From: Richard Carpenter on 5 May 2008 19:11
"Quaoar" <quaoar(a)marcabfleet.net> wrote in message
news:q7KdndkMjLNTH4PVnZ2dnUVZ_jCdnZ2d(a)comcast.com...
>
> Notebook cooling pads are simply a waste of money and time. None do
> anything but cool the bottom case surface where little internal heat is
> rejected. I hope that those USB-powered cooler manufacturers are sued
> into oblivion when the notebook's USB is burned to the ground for no
> apparent benefit.
>

I would say there is definitely value to cooling the bottom side of most
laptops. That said, I agree that the USB-powered coolers have been known to
draw enough power to burn out USB ports. It happened to a friend of mine,
who was using one on his Toshiba Satellite (some 4 or 5 years old, now).

Also, two things to consider: 1) my Toshiba (also nearly 5 years old) got
*very* hot - so hot that I had to move it from my lap. It would actually
leave my legs red if I were wearing shorts, and 2) AMD mobile processors do
get hotter than their Intel counterparts. AMD seems to have overcome the
heat issue with their desktop processors, but their mobile offerings still
generate more heat than Intel.

--
Richard Carpenter

From: BillW50 on 5 May 2008 20:01
In news:SYGdnZTEpKC4CYLVnZ2dnUVZ_h6hnZ2d(a)comcast.com,
Richard Carpenter typed on Mon, 5 May 2008 19:11:32 -0400:
> "Quaoar" <quaoar(a)marcabfleet.net> wrote in message
> news:q7KdndkMjLNTH4PVnZ2dnUVZ_jCdnZ2d(a)comcast.com...
>>
>> Notebook cooling pads are simply a waste of money and time. None do
>> anything but cool the bottom case surface where little internal heat
>> is rejected. I hope that those USB-powered cooler manufacturers are
>> sued into oblivion when the notebook's USB is burned to the ground
>> for no apparent benefit.
>
> I would say there is definitely value to cooling the bottom side of
> most laptops.

Well maybe... but the one that Bobb talked about...

In news:Y8KdnSDVXu0ujYLVnZ2dnUVZ_tSknZ2d(a)comcast.com,
- Bobb - typed:
>>> http://www.antec.com/us/productDetails.php?ProdID=75004#
>>> http://www.antec.com/pdf/flyers/NoteBookCooler.pdf

Draws air from the top and pushes out the bottom. Which is the opposite
of natural airflow, as heat rises. And most laptops I know draws air
through the bottom and out the side. Thus at least this notebook cooler
is fighting against natural flow and against the laptop's own fan. It
might work, but it seems to make things work against each other isn't
such a good idea.

> That said, I agree that the USB-powered coolers have been known to
> draw enough power to burn out USB ports. It happened to a friend of
> mine, who was using one on his Toshiba Satellite (some 4 or 5 years
> old, now).

My tests shows on this Gateway MX6124 laptop has a drop of 20�F of the
CPU if I add rear legs to boost the rear up an inch or so. As the CPU
runs at 150�F if it is on a flat table. And 130�F with my rear leg
modification. And the critical temperature of this Celeron M is at
156�F. So I think running at 130�F is no problem at all. Why would you
want more weight and power if just boosting up the laptop to increase
airflow will do the trick too?

> Also, two things to consider: 1) my Toshiba (also nearly 5 years old)
> got *very* hot - so hot that I had to move it from my lap. It would
> actually leave my legs red if I were wearing shorts, and 2) AMD
> mobile processors do get hotter than their Intel counterparts. AMD
> seems to have overcome the heat issue with their desktop processors,
> but their mobile offerings still generate more heat than Intel.

Oh I would never buy an AMD Mobile processor. But that is just me. ;-)

--
Bill

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