Will a T series processor always be louder and hotter than any P series processor?

Just curious...there are a lot of nice laptops im not even considering because they are T series processors and i think theyll be really loud...should i forget about that?

Also, will a discreet GPU always be louder and hotter than an integrated GPU?

 

No. A P might generally run slightly cooler/quieter than a T, but it mainly based on the computers heat management.
There isnt much fluctuation between the two.

i have a T9300, that never usually goes over 30-35C.

IGP's are almost always cooler/quieter than GPU's though.

 

Processors never make noise; it's your fans that make noise. Hypothetically T-series processors should run hotter, but it is all dependent on how well your notebook's cooling system is. My P8400 ideas at around ~40*C for comparison's sake.

 

my P8600 idles at about 37, but under load goes up to 60-70 coz it's sharing the cooling with 9600GT, which is quite a hot baby...

so it all down to the cooling rather than T or P, really

 

Yep.

Yep.

 

I have undervolted my older T8300 (45nm Santa Rosa Peryn refresh) so it runs under 23.76W, the T8300's TDP rating is 35W...lol

 

T series have 35W TDP and P series 25W. However, that's meant to be the maximum full load power. Since individual CPUs have different pre-defined voltage ranges then the actual power consumptions vary. The power difference appies through the operating range so the P series have lower maximum power consumption than the T series. Both types of CPU can be undervolted. How much depends on the individual CPUs.

Power consumption = heat = work for the cooling system. The noise made by the fan depends on the cooling system design. Small fans in thin notebooks have to spin faster to remove the same heat as a bigger fan spinning more slowly.

Dedicated GPUs produce more heat both on idle and under load compared with integrated GPUs of the same generation. This is a side effect of more transistors to provide extra processing power.

If you are sensitive to fan noise then look for a P series CPU + Intel GPU in a notebook which users report to be quiet. For example, my Dell E6400 (P8600 + Intel graphics) is quiet, partly because the cooling system is designed for a T series CPU + nVidia GPU. Samsung notebooks are usually quieter than average.

John

 

It really depends a lot more on cooling than anything else - a laptop with a quiet cooling system, or that allows the processor to run hotter before putting the fans on high, will matter more than whether a T or P series processor is used. The only time T or P series would matter at all is when it's running near full power usage. When it's near-idle, neither one will generate enough heat to cause significant fan noise, as neither uses that much power at idle - assuming a decent cooling design. Most laptops these days use a T series or AMD equivalent, and it's certainly not the case that most laptops these days are really loud. I wouldn't let the fact that a notebook uses a Txxxx processor prevent you from buying it.

A discrete GPU almost always will produce more heat - although there probably is an exception somewhere. If you care about low heat and battery life, and not about games or other graphics-intensive things (which does not include movie-watching), then an integrated GPU is probably the best choice for you.

Same - my T7500 undervolted runs at the equivalent of 21.24W TDP. Which brings up a good point - undervolting is a really good way to reduce heat production and power usage. Your mileage will vary depending on your individual processor, but 20-30% reduction in power usage at full power is not uncommon, at least with the T-series. Since the P-series uses less to begin with, the average reduction may be less. Undervolting also can reduce idle power draw - thanks to undervolting, my laptop runs just fine with no fans at all at idle - the temperature always stays below 60C, usually close to 51 or 52.

Mathematically, power use is proportional to voltage squared. So a processor that ran at 2V would, all else being equal, use one-fourth the power of one that ran at 4V (note that today's processors use more like 1.3V).

 

Which notebook brand/model has the best cooling system? Magazine reviews never seem to mention this. They only focus on performance.

 

lenovo thinkpads, hands down, if you're looking for something ultra quiet and cool.

if im not mistaken, notebookcheck.net does measure the sound output of the notebooks it reviews, along with uniformity of screen backlighting etc etc

 

I can't complain about my Dell E6400. I need to be in a quiet room to be able to hear the fan. However, I have the P series CPU and Intel graphics while the cooling system is designed to handle the heat from a T series CPU and nVidia GPU. The various Samsung notebooks that have passed through my hands have also had relatively quiet cooling systems. they also have the option to reduce the noise further by limiting CPU speed and allowing higher CPU temperature.

John