Re: AMD RADEON HD 7990 vs i7 870
First, I recommend using the 13.8 V2 drivers. Secondly, any Crossfire solution is going to have micro-stuttering. It's what AMD cards are known for apart from frame latency, which the 13.8 drivers have cleaned up quite a bit.
Next, the easiest way to tell if the card is being bottlenecked is monitor GPU usage with MSI-Afterburner. If the first GPU is at 99% (or slightly below) and the second GPU is barely being used, that's just the game/drivers not utilizing your second GPU properly. If both are being used equally and they are around 70% or lower then that would be your CPU holding your GPU back.
If it is, a 4670k would be a huge upgrade over your current i7.
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