It's a 1x to 16x powered riser, this one:
An yes.. I too and seeing a real delay with BTER deposits as well.
what was your command line when launching cudaminer with the risered card? if you've been using -H 1, try switching to -H 2.
Maybe the x1 bus connection was beginning to limit the hashing speed, so the benefits of any additional overclock were lost.
Christian
I will try that.. It was -d 1 -m 1 -l T5x24 -i 0 -H 1
I replaced it back in the system for now to get some power measurements, I will retry with
System idle 183 watts
Hashing at default clock - 294 watts
Overclocked hashing - 319 watts
Speeds were 1371 GPU /3477 Mem - pictured below