[Lee Berger] ", I'm going to have to replace the Fiber Channel Card. I can save $200 by going with a 2Gb, dual channel over the 4Gb dual channel."
OK
No it will not make your current array any faster.
Think about the future- yes your current array is only 2GB/s now but the the card at 4GB/s will support your current array and anything that you may add in the future.
I say spend the $200 now to save you a second "new" card later.
gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows
Inside look at the IoHD