[Tested and Burned] ASUS GeForce GTX 560 Ti DirectCU II TOP Review



ASUS ENGTX 560 Ti DirectCU II TOP Review Index



7 – ASUS GeForce GTX 560 Ti DirectCU II TOP Power consumption and Overclocking

ASUS GeForce GTX 560 Ti DirectCU II TOP, FurMark 1.9.0



UPDATE
More overclocking here: (Tested) ASUS GTX 560 Ti DirectCU II GPU Overclocking Session: GPU reaches 1000MHz.




For the power consumption and overclocking test, I used the upcoming FurMark 1.9.0 (still not released due to a little lack of time but it should be there shortly! –already seen somewhere…). The graphics workload in the new FurMark 1.9.0 has been slightly increased, leading to more power consumption (few watts in more). But this extra graphics workload can make the difference with high overclocking settings.

The total power consumption of my testbed in idle with the GTX 560 Ti is 100W.

As I said in the first part of the review, GTX 500 power monitoring hardware (see here: GeForce GTX 580 Power Monitoring Details)
is an optional feature on GTX 560 Ti. ASUS has decided to not implement this power monitoring hardware on its custom GTX 560 Ti DirectCU II TOP. And honestly it’s a good choice, especially for a card with high quality components (chokes, capacitors, MOSFETs) like this one.

I say that ASUS has not implemented the power monitoring hardware but actually I have no confirmation of this fact. I base my assumption on my FurMark tests. But I’m sure that ASUS has tweaked or removed this power monitoring hardware because of the power consumption of the card: around 225W for the card alone with default clocks when FurMark 1.9.0 is ruuning.



With default GPU clock speed (900MHz), the total power consumption of the testbed stressed by FurMark 1.9.0 is 351W for a max GPU temperature of 78°C (FurMark settings: 1920×1080, fullscreen, Burn-in mode, dynamic background, no AA, no postfx).

Hey, just a detail: ASUS’s DirectCU II VGA cooler is a great product and GPU temperature at idle does not exceed 33°C. Really nice!

The reference clock of the GF114 is 822MHz. There is already a factory overclocking of +78MHz. Let’s see if we can go further.

  • FurMark 1.9.0, GPU core: 900MHz, Vcore: 1.025V, Total power consumption: 351W, GPU temp: 78°C
  • FurMark 1.9.0, GPU core: 940MHz, Vcore: 1.025V, Total power consumption: 360W, GPU temp: 80°C, stable in Burn-in test, stable in Xtreme Burn-in test
  • FurMark 1.9.0, GPU core: 950MHz, Vcore: 1.025V, Total power consumption: 362W, GPU temp: 80°C, stable in Burn-in test, UNSTABLE in Xtreme Burn-in test
  • FurMark 1.9.0, GPU core: 960MHz, Vcore: 1.025V, UNSTABLE in Burn-in test, UNSTABLE in Xtreme Burn-in test



Then without tweaking the GPU voltage, the max stable GPU clock is 940MHz (or +118MHz compared to the reference clock). And I’m sure that with a little boost of the GPU voltage, we can increase again the GPU clock speed (up to 1000MHz?).

We can the calculate the power consumption of ASUS’s GTX 560 Ti with default GPU clock. The Corsair AX1200 PSU has an efficiency factor of around 0.9 (see this article, there is a graph of the AX1200 efficiency).
P = (351-100) * 0.9
P = 225 watts

225W is rather far from the TDP of 170W. It’s normal. The TDP is not the max power consumption of the card and ASUS’s GTX 560 Ti is already overclocked. Then a GTX 560 Ti with an overclocked GPU stressed by FurMark can exceed without problem 220 watts.

Here is a stress test with FurMark 1.8.2 Xtreme test mode and the GTX 560 Ti DCII TOP with default clocks:

  • FurMark 1.8.2, GPU core: 900MHz, Vcore: 1.025V, Total power consumption: 346W, GPU temp: 75°C

Here is a comparative table of the power consumption of the card ALONE (not the total power consumption of the system):

Power: 352W – EVGA GTX 580 SC (core: 880MHz, Vcore:1.082V) – OC settings
Power: 330W – ASUS ENGTX580 (core: 871MHz, Vcore:1.088V) – OC settings
Power: 324W – EVGA GTX 580 SC (core: 797MHz, Vcore:1.082V – default settings)
Power: 298W – ASUS Radeon HD 6950 (core: 840MHz, Vcore: 1.300V) – OC settings
Power: 290W – ASUS ENGTX580 (default settings)
Power: 276W – SAPPHIRE Radeon HD 6970 (core: 940MHz, Vcore: 1.175V) – OC settings
Power: 272W – EVGA GTX 480
Power: 260W – SAPPHIRE Radeon HD 6970 (core: 880MHz, Vcore: 1.175V)
Power: 225W – ASUS ENGTX560 Ti DirectCU II TOP (core: 900MHz, Vcore:1.025V)
Power: 220W – SAPPHIRE Radeon HD 6870 (core: 1000MHz, Vcore: 1.300V) – OC settings
Power: 197W – ASUS Radeon HD 6950 (core: 810MHz, Vcore: 1.100V)
Power: 185W – ATI Radeon HD 5870
Power: 155W – SAPPHIRE Radeon HD 6870 (core: 900MHz, Vcore: 1.175V)
Power: 147W – ASUS EAH6870
Power: 135W – MSI N460GTX Cyclone 768D5 OC



ASUS ENGTX 560 Ti DirectCU II TOP Review Index


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