Artifacts appear when overclocking the ATI 5470 on an Asus A42JR notebook

Hey guys, it seems that my friend's laptop has trouble overclocking the ATI 5470 gpu.

Whenever it is being overclocked tiny green squares will appear all over the screen.

It works fine on stock clocks (750/800).
Anything more than that, artifacts will start appearing.

My ATI 5650 has no trouble overclocking, but I can't understand why the 5470 reacts differently when overclocked.
Can someone explain to me why ?

I'm using AMD GPU Clock Tool btw...

 

ups.......

 

this is normal

 

So it can't be overclocked ? Do you have a ATI 5470 too ?

 

I doubt the designed the chip to fail when overclocked... but if it *could* go faster, it probably wouldn't have been binned down.

 

Any way to confirm this ?

 

every card is different, some go more some go less, some don't go at all. that is because at the factory they push some chips to their limit, and when you get them there is no room for improvement.

a tip is don't overclock the memory or shader, just do the core. infact you might try underclocking the memory to see if you can overclock the chip higher without artifacts and lockups. start at factory settings then boost the frequency by only 5mhz and run a demanding benchmark to see if it messes up, keep doing that to see how far it will go. Once you find the maximum you will have to back down 10 to 15mhz to keep the system stable.

 

NO it's not like that u cannot Overclock ur ATI 5470 ............ihave a ATI Mobility Radeon5470 HD(512)mb.......i used AMD GPU Clock tool and over clocked both memory and core by 30mhz and there was a huge diffrence in performance......before overclocking i got about 10-17 fps in COD MW2 but after overclocking it was about 25-30fps or more.....GPU Temp was below 72 degree celcius.....i tested it with several benchmarks and the system was still stable =D

 

A lot of people don't seem to understand this. Overclocking means going over the factory's stable limit. Sometimes it works, sometimes it doesn't. Just because your hardware can't overclock, doesn't mean you have a lemon. It just means you got a product that can perform 100%, just not 101%.