How powerfull a pump(s) for this rad ?

[MindBuster]

Ok, so there's a guy who wants to sell this radiator very cheap, but by the size of the thing, how powerfull pump(s) would suffice ?

It got more than one inlets/outlets, guess one could be used for cpu and another for gpu (prolly SLi), and it would need no fans obviously.

He couldnt tell me about pumps as it has never been used for PC watercooling, he got it for free at his work, and it's quite expensive from new, specially made at this company ,so not something that can be bought everywhere.

Here a pic...

It measures 115cm x 55cm x 6,5cm so i guess a pretty powerfull pump(s) is needed.

 

[robble]

Here are a couple that would work well.
http://www.amospumps.com/waterpumps.htm



I'd use 3 12" vornadoes on that rad!