03-03-2019, 03:12 PM
I started using hashcat with my old GTX670, which does 48kH/s WPA. It is stable and can run 24/7 for a long time. Then I replaced it with a GTX970. It's as stable as the old GPU and does 170kH/s WPA. Improvement is great.
gtx970.png (Size: 58.62 KB / Downloads: 7)
As you can see the core is at 1316 MHz, temp at 70c (never goes higher) and fan at 61%. Everything is perfect.
But then I thought why not use both cards? So I attached back GTX670 to the second PCIE slot (I have 3 in total; MB is MSI Z77A-GD65) and then GTX970 started behaving strange:
both-cards.png (Size: 61.59 KB / Downloads: 11)
It quickly reaches 79c, fan runs faster too and gets so loud. Meanwhile GTX670 is running fine, like before, when it was alone. I tried underclocking GTX970 and it didn't help much:
underclock.png (Size: 66.48 KB / Downloads: 5)
Core is down to 813 MHz, cracking speed to 134kH/s but the temp is still high: 74c.
I see the bus speed is 16 when GTX970 is alone but 8 when both cards are present but I read that even PCIE x1 is fine for hashcat cracking.
What am I missing, what did I do wrong?
gtx970.png (Size: 58.62 KB / Downloads: 7)
As you can see the core is at 1316 MHz, temp at 70c (never goes higher) and fan at 61%. Everything is perfect.
But then I thought why not use both cards? So I attached back GTX670 to the second PCIE slot (I have 3 in total; MB is MSI Z77A-GD65) and then GTX970 started behaving strange:
both-cards.png (Size: 61.59 KB / Downloads: 11)
It quickly reaches 79c, fan runs faster too and gets so loud. Meanwhile GTX670 is running fine, like before, when it was alone. I tried underclocking GTX970 and it didn't help much:
underclock.png (Size: 66.48 KB / Downloads: 5)
Core is down to 813 MHz, cracking speed to 134kH/s but the temp is still high: 74c.
I see the bus speed is 16 when GTX970 is alone but 8 when both cards are present but I read that even PCIE x1 is fine for hashcat cracking.
What am I missing, what did I do wrong?