GTX980 vs GTX1080
#1
Calculation powers;
Gtx980 4.6 TFlops
Gtx1080 9 TFlops


hashcat64 -b -m 2500
hashcat (v3.00-1-g67a8d97) starting in benchmark-mode...
OpenCL Platform #1: NVIDIA Corporation
- Device #1: GeForce GTX 1080, 2048/8192 MB allocatable, 20MCU
Hashtype: WPA/WPA2
Speed.Dev.#1.:   415.1 kH/s (94.61ms)
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hashcat64 -b -m 2500
hashcat (v3.00-1-g67a8d97) starting in benchmark-mode...
OpenCL Platform #1: NVIDIA Corporation
- Device #1: GeForce GTX 980, 1024/4096 MB allocatable, 16MCU
Hashtype: WPA/WPA2
Speed.Dev.#1.:   224.9 kH/s (91.26ms)
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hashcat64 -b -m 2500
hashcat (v3.00-1-g67a8d97) starting in benchmark-mode...
OpenCL Platform #1: NVIDIA Corporation
======================================
- Device #1: GeForce GTX 1080, 2048/8192 MB allocatable, 20MCU
- Device #2: GeForce GTX 1080, 2048/8192 MB allocatable, 20MCU
Hashtype: WPA/WPA2
Speed.Dev.#1.:   417.4 kH/s (94.67ms)
Speed.Dev.#2.:   414.8 kH/s (95.83ms)
Speed.Dev.#*.:   832.2 kH/s
#2
Hash algorithms use integer math, not floating point math, so TFLOPS is absolutely irrelevant when it comes to password cracking.