Can not crack some example of hashes

some of example Hash-Mode could not be crack. like:
RAR5 --> 13000
Winzip --> 13600
i use hashcat version 4.1
my device is AMD Radeon 6970
hash is example of hashcat in https://hashcat.net/wiki/doku.php?id=example_hashes
driver is catalyst-15.7 and windows 10, 64 bit

but i crack this with NVIDIA 1080 ti 
why radeon 6970 can not crack?