sapb, which card (est)

[marsman007]

If I do a benchmark instead of attacking one hash (bruteforce) , I see the following results:

oclHashcat64.exe -b -m 7700
oclHashcat v1.31 starting in benchmark-mode...

Device #1: Cayman, 2048MB, 830Mhz, 24MCU
Device #2: Cayman, 2048MB, 830Mhz, 24MCU
Device #3: Tahiti, 3072MB, 830Mhz, 32MCU
Device #4: Hawaii, 3072MB, 830Mhz, 44MCU

Hashtype: SAP CODVN B (BCODE)
Workload: 1024 loops, 64 accel

Speed.GPU.#1.: 118.7 MH/s
Speed.GPU.#2.: 118.7 MH/s
Speed.GPU.#3.: 725.3 MH/s
Speed.GPU.#4.: 985.7 MH/s
Speed.GPU.#*.: 1948.4 MH/s

cudaHashcat64.exe -b -m 7700
cudaHashcat v1.31 starting in benchmark-mode...

Device #1: GeForce GTX 660 Ti, 2048MB, 1137Mhz, 7MCU

Hashtype: SAP CODVN B (BCODE)
Workload: 1024 loops, 256 accel

Speed.GPU.#1.: 293.6 MH/s

Also with benchmark, HD 6990 is lagging far behind the 290X. Even my old GTX660 Ti is faster?
HD6990 is somewhat faster than your benchmarked HD5970 which is in line with the estimates from http://golubev.com/gpuest.htm

Still, I don't understand the big difference between HD6990 and 290X?