Maybe because I'm using Asus GPU tweak..give it a try, or can also opt for sapphire TrixX?

when i oc my sapphire 7950 flex oc edition.
i saw my firefox browser got some artifacts, small white squares.
is this normal or the gpu damage ?

can i send it to rma ?

i lower the voltage to get lower temperature.
so the artifact is because low voltage ?
how about the trixx  board power li.
should i change it to 20 or leave it ?
thanks alot.

I dont think it's because of lower voltage esp when you can only see it in firefox and not games. I'd say try to change it to 10 first, if artifact still there then try to change to 20 when OC'ing the GPU. these are just few steps to find out a root cause of your problem. usually when people OC< they wont lower the voltage but instead either keep using stock volateg or raise the voltage a bit. so have you tried updates driver/firefox/flash player etc?

okok.
i will try it tonight set 10 first and see there is any artifact .
i lower the voltage because this is rig going to full load 24/7.
with stock voltage will be very hot and the fan noisy.
this is actually fresh windows and all updated software.

another question is if i change the board power li,is the temperature also increase or remain the same ?
example remain the same clock speed and memory but just put board power li to 10.

when your power limit is set at 100%, this means your card is 'limited' to it's TDP...each GPU has a set of TDP(total draw power), and if whatEVER you're doing with the card is causes it to exceed a draw of 175W(example), the driver will start to downclock and downvolt the card in order to get it run within the expected power envelope designated by the power target slider and the TDP.

Raising the Power Target up simply allows for your card to draw more juice through it's three connectors without resorting to downclocking/volting. In the scenario I described, it's likely that whatever % value you have available over 100% is going to reflect the difference between TDP and 'max safe wattage draw', based on the connectors running to your card. If your card indeed had a TDP value of 175, it's likely that max power target would be 100% + (225-175)/175 * 100, or 128% maximum power target.

So, when you OC, and especially when you OV your card, you are obviously likely to increase the power draw of the card (depending of course on the intensity of the test, whether you have v-sync on, these types of things), and if you don't raise the power limit, it might well cause the card to downclock/downvolt when you don't want it to.

ic,but i am a bit confuse board power li with the vddc.
both is adjust the power.

that mean giving enough juice for the gpu to order oc better not throttle.
is this also mean the temperature increase,because i care about the temperature.

edited:load stock clock ,the thing appear again when gpu full load.
so this gpu can rma ?

A LYN forumer is kind to send me the SAPPHIRE R9 280X TOXIC for review.



This card shows some decent mem overclocking. VRAM overclocked from 6400MHz to 8200MHz on air

  panjang betoi kad nie....

off topic .. what model  memory it carry out .. sk hynix @qimonda

Yes, it is even longer than the dual GPU powered MARS 760
The memory chip made of Hynix AFR

Nice OC and score , but to see those Mem clock on air 

A LYN forumer is kind to send me the SAPPHIRE R9 280X TOXIC for review.



This card shows some decent mem overclocking. VRAM overclocked from 6400MHz to 8200MHz on air

Using a Sapphire 7970 Ghz Edition Vapor-X 6GB

Hmm , I push my clock speed to 1150 already with stock voltage 1.256v . ( Enough ? )

Temp peak at 74c (Safe ?). I'm stressing it with Heaven loop ( correct way ? )

for 7970, 1150MHz core is a sweet spot for 24/7 OC..it's good if you stay at this clock first and do heavy gaming for a week or two. If no black screen,artifacts, driver resert or game crash during that period then you're good to try even higher though I dont feel a need if you go a little bit higher.

Your card might be able to pushed up to 1200MHz+ but temps will rise proportionally and that's not a good idea for the long run. so if I were you, I'd stay at 1150MHz for heavy gaming and stock speed for normal games which dont require max gpu power.

Temp at 74max is good..to me below 80'C is considered fine enough. you can use valley,heaven,3dmark and some other heavy games benchmark like metro LL, metro 2033, AvP etc also to test OC stability..