SHA512 Linux

[testing123]

I'm trying to run a dictionary attack on Linux password hashes with my AMD 7850, I only get about 5500 H/s, is this a realisitic figure or am I doing something wrong here? I'm using the following command

Code:

oclhashcat64 -m 1800 -a 0 --remove hashes.txt -o cracked.txt mydictionary.txt

[royce]

That looks about right, given your card.  sha512 is a slow hash.

Code:

cudaHashcat v1.38 starting in benchmark-mode...

Device #1: GeForce GTX 970, 4095MB, 1316Mhz, 13MCU
Device #2: GeForce GTX 970, 4095MB, 1316Mhz, 13MCU
Device #3: GeForce GTX 970, 4095MB, 1316Mhz, 13MCU
Device #4: GeForce GTX 970, 4095MB, 1316Mhz, 13MCU
Device #5: GeForce GTX 970, 4095MB, 1316Mhz, 13MCU
Device #6: GeForce GTX 970, 4095MB, 1316Mhz, 13MCU

Hashtype: sha512crypt, SHA512(Unix)
Workload: 1024 loops, 8 accel

Speed.GPU.#1.:    54711 H/s
Speed.GPU.#2.:    54782 H/s
Speed.GPU.#3.:    54745 H/s
Speed.GPU.#4.:    55171 H/s
Speed.GPU.#5.:    55579 H/s
Speed.GPU.#6.:    55132 H/s
Speed.GPU.#*.:   330.1 kH/s

[testing123]

Thanks for your answer, I could be here some time...