01-28-2015, 11:38 PM
Power supply is irrelevant. The 295X2 requires nearly 550W when using oclHashcat, but it is only a 500W card. So the firmware will throttle the GPUs to keep the power draw under 500W. This is what AMD calls "PowerTune." It dynamically manages clocks and voltages to prevent the card from drawing too much power.
The card also has a maximum temperature of 75C, unlike the 290X which has a maximum temperature of 95C. This means if the card starts to get anywhere near 75C, the firmware will throttle the GPUs to keep the temperature down. This limit is way too low, but there's nothing you can do about it.
Both of these things make the 295X2 a poor choice for oclHashcat use.
This has all been explained multiple times before. Search the forums.
The card also has a maximum temperature of 75C, unlike the 290X which has a maximum temperature of 95C. This means if the card starts to get anywhere near 75C, the firmware will throttle the GPUs to keep the temperature down. This limit is way too low, but there's nothing you can do about it.
Both of these things make the 295X2 a poor choice for oclHashcat use.
This has all been explained multiple times before. Search the forums.