Will One Pump Suffice?
 

Hi, I'm looking to run a Swiftech XT CPU block, EK Northbridge block, a universal GPU block (AquaXtreme MP-1), and three Swiftech triple rads. Do you think a single Swiftech MCP655 will suffice? It's the one with a speed adjuster, if that makes any difference.

Interesting question. the three rads bit is what IDK. otherwise I would vote no issues.

what is preventing you from going dual pump for safety sake?

A combination of cost and space constraints. Is three rads too many? I suppose I could just use two. I just have three lying around so I thought I'd use them all.

go for it then.
lying around parts need to be put to use.

One pump is fine, most people with two pumps could easily use one, but choose two for redundancy, I am cheap/poor so I run a single pump, and just set my motherboard to shut down if my CPU reaches 65C.