I have a cisco 7507 with VIP2 R5K cards. All have one VIP card with 32Mb cpu sdram / 4Mb sdram. On one of the VIP's I have 2x FE100 single port cards. I am seeing CPU time on this VIP reach 50% at times on average. All others have 6% or less CPU usage on average. My question is if it is possible the traffic flowing on these two interface could be affecting Internet browsing speeds and resulting in latency spikes. This same router has a VIP4 card with 256 / 64Mb sdram. Would it make more since to move the FE100 cards over to this VIP4 card with more memory?