nvfans wrote:
話說發文的既然看錯了...(恕刪)
日本度假ing 不便多說.
文章數據圖片全都在那,麻煩自己看.
阿 說好的醬鴨超頻呢?
待機電壓0.850V提升至0.950V，負載電壓1.170V提升至1.256V。
HD 7970 Tahiti XT
113-C3860100-100
Tahiti B0 CR XT C38601 GDDR5 3GB
300MHz / 150MHz : 0.850V
925MHz / 1.38GHz : 1.170V
HD 7970 GHz Edition Tahiti TX2
113-C3862000-004
Tahiti B0 XT2 C38620 GDDR5 3GB
300MHz / 150MHz : 0.950V
1.05GHz / 1.5GHz : 1.256V
8156777 wrote:
舊版7970預設時脈...(恕刪)
What can I say?
AMD's mechanism is really basic, in high-performance 3D, the card runs at a single fixed clock speed of 1050 MHz, just like any other AMD card did in the past. Only when AMD's PowerTune algorithm detects an overload situation, it will reduce the clock speed to a fixed value of 1000 MHz, that's it.
Each of these two clocks (1050 MHz and 1000 MHz) has one voltage associated with it. You can see two additional faint points at the other clock's voltage, but these are measurement artifacts from the switching of clock and voltage, which does not happen at the same time. For example, when going to 1000 MHz to 1050 MHz, the voltage will also change to 1.219 V from 1.163 V. But since either the clock change or the voltage change will be finished first, it will create a "new" combination of clock and voltage, which is displayed in the plot.
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