Please help: 2 of the 4 290X are way too slow when performing dictionary attack

[SomeGuy]

2) all 4 cards perform identically when performing brute force attacks. Problem materializes when performing dictionary attacks

OK so on brute force it runs 100% but on a dictionary attack it runs at 85%...brute force shouldn't need to transfer anything but on a dictionary attack is the whole dictionary in RAM or VRAM? if it is in RAM then it could be due to the 1x limit because the only thing different from brute force and dictionary is that a dictionary is needed. How is the dictionary supplied to the GPU? constant? Bulk? or is 100% of it loaded into it (VRAM)?