Performance increasing relative to variation

[Todeskuss]

When I run the following:

Code:

cudaHashcat64.exe -w 3 -a 3 hash.hash mask.hcmask

where mask.hcmask reads as:

Code:

56789,0.9?1?d?d?d?d?d?d?d?d?d?d?d?d56dbXXXXbababXXXXbe8d6XX

I get only about 131 MH/s

However when I change mask.hcmask to:

Code:

0.?d?d?d?d?d?d?d?d?d?d?d?d?d?d56dbXXXXbababXXXXbe8d6XX

I get 1150 MH/s

In the first one, there can be only choices from 0.9ydddddddddddd* where y = any numbers 5-9 and d = any numbers 0-9.  In the second one, there can only be choices from 0.dddddddddddddd* where d = any numbers 0-9.  In the first example there is less variety but my performance is severely hindered.  In the second example there is more variety but I get more MH/s.  The first one does take less time to perform but not by much because my performance becomes atrocious.

Also, when I run cudaExample0.cmd, I get 426 MH/s

Note: The 56db* string is not my hash, it's a standard string that needs to be included at the end before hashing

Why does my performance vary like this? Am I doing something wrong? Is there a way to ensure that I get as high performance as I did in my second mask?

GPU: GTX 650 Ti Boost
CPU: i3 4160