Probably not. No. That is a good card. Only cheap PCI cards or PCI x1 cards have bottlnecks (because the slots do)
I think you card is x4 speeds so it's unlikely a bottleneck for you.
Someone might be able to put math to it but generally a HDD only reads up to 200MB/sec (3TB SEAGATES)
(I'm too lazy to look up x1, x4 speeds etc and do the math. Sorry)
"Too much is almost enough. Anything in life worth doing is worth overdoing. Moderation is for cowards."