Sapphire R9 270 Dual-X slower than HD5850

[TheDarkOne]

Hi there,

i just wanted to confirm something I've stumbled upon while trying out different Graphic Cards I have lying around.

I've got a Sapphire R9 270 Dual-X and an Sapphire Radeon HD5850 Toxic. The Results for cracking SHA512 seem ok as the R9 is noticable quicker then the HD5850 (About 195 MH/s for the R9 compared to the ~145 MH/s for the HD5850) but when I try the OS X 10.9 Hash the R9 is way slower than the HD5850.

On Workprofile 3 the R9 cracks ~1300 H/s and the HD5850 scratches at the 1900 H/s Mark. I've tried the Hash on my Linux Installation as well as on my Windows Installation (Linux = xUbuntu 14.04 x64 with Catalyst 14.9 and oclHashcat 1.31 ; Windows = Windows 7 Ultimate x64 with Catalyst 14.9 and oclHashcat 1.31).

Now the Question: Is this normal? Can I assume that its Hash related or am I missing something here?! The Parameters I used were the following:

Code:

sudo ./oclHashcat64.bin -m 7100 -a 3 -w 3 --status <hash> -1 ?l?d?s

I would appreciate any Suggestions as to why the R9 is significantly slower at this Hash than the Hd5850. If its an Architecture related Problem of the Card any Suggestions as to which Cards I should buy to improve the Performance when cracking OS X 10.9 Hashes whould be nice!

Thanks in Advance