ATI 5730 GPU Temps.

There is a nice thread about overclocking the hd 5730 here:

http://forum.notebookreview.com/asus-reviews-owners-lounges/457517-asus-n71ja-x77ja-review-oc-freak.html

With 750/950,I basically get the same overall effect as Oc-Freak at 800/1000 (mind that my CPU is just slightly faster). But there is quite a difference between stock and oc'd GPU - around +1,5k 3dMarks 06.

Anyways my CPU and GPU temperature difference under load, between stock GPU clocks and overclocked values, differs only 1°C. Looks like the hd 5730 is made for overclocking

I have also noticed that when idle, my GPU clocks drop to 100/150, which i belive is very interesting... Don't know why??? But should lenghten my battery life, when not plugged in, so i am not touching that.

Regards

 

Could you please explain a bit more about this?

Thank you and best regards,

K

 

That is awesome...wonder why they aren't advertising this? In essence it's doing the same thing as an i7...running at say 1.6GHz and only speeding up if the application demands it, thats how a computer should be.

 

It's more complicated that chips being simply binned for different clock speeds.

If a chip wont to 600mhz at 1.2v it may to 500mhz at 1.1v. They reduce voltage for lower binned prodcuts because lower frequencies dont need so high voltages for a chip to be stable.

A chip's power consumption scales pretty linearly with frequency, however its a squared relationship with voltage.

Therefore a 10% voltage increase will cause a MUCH larger increase in power than a 10% frequency increase.

That's why overvolting and overclocking a chip can cause chips to run so much hotter.

 

Thats Ati PowerPlay. You can enable and disable it in CCC.

 

Thank you for the explanation.

I belive that power consumption is proportional to voltage, it's not a squared function (power = current x voltage). Or am I mistaken? It can be a square function, when using the equation with the resistance - but resistance very much depends on temperature. I am not sure that this is a credible way of calculating the power consumption (at least not with simple linear equations).

Anyway, i tested the card's temperature at stock settings and at overclocked settings (similar conditions) and the temperature difference was 1°C. Throughout the test my fan was running at "normal" speed on both settings (according to NBProbe program) - when the laptop is idle it's says "low and quiet".

So i don't belive that 1°c or even 10°C increase is problematic, as long as the temperature is under cca. 85°C (for GPU).

 

Hello.

I have "maximize performance" while plugged in, but still the clocks are 100/150 - when i disable the powerplay, the clocks indeed jump to 650/800. But i don't know why this is happening if "maximize performance" is selected?

I am not complaining, i think this is a huge power saver, but i just don't understand it. Maybe it's like with the new processors - like wetcardboard said: when extra power is needed, the card gives it...

 

a little of topic but how are u getting switchable meaker?