hashcat v3.00 - Is this the reasonable speed on Mac?

[ukyang]

Just compiled hashcat v3.00-7-gedb5028 on osx 10.11.5. Here is the result I got from benchmark:

ukyang@MBP [:][/Forfun/hashcat] ./hashcat.app -d 2 -b
hashcat (v3.00-7-gedb5028) starting in benchmark-mode...

OpenCL Platform #1: Apple
=========================
- Device #1: Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz, skipped
- Device #2: GeForce GTX 760, 512/2048 MB allocatable, 6MCU
- Device #3: Iris Pro, skipped

Hashtype: MD5

Speed.Dev.#2.:  6341.0 GH/s (0.05ms)

6431 GH/s, this speed is amazing. But it seems too good to be true. Can anyone tell me if this benchmark is valid or not?

Thank you.