How many radiators do I need?

[neo-omega]

I am looking to upgrade my system by adding a second 4870 (512) and to water cool it in the same loop as the rest of my rig (overclocked Q6600, 4870 (512)). I currently have a triple radiator (a thermochill PA 120.3 I believe). Will that be enough to cope with it or should I get a second, double radiator?

I know that naturally more cooling surface is better but for the life of me i couldn't find recommendations or a rough guide to the most suitable radiator size for the job.

Any and all input welcome ^_^ (even if it's to point out a thread I haven't noticed.)

 

[pastymuncher]

If it's just the pair of graphics cards and the cpu then the PA120.3 will be enough. I have one keeping the cpu/nb/gpu cool and it copes extremely well. Going to add another 5770 soon as well.

 

[Teq]

I just had a PA160 and a high flow loop for a single GPU, NB and Q6600 solution, I do have a handy spreadsheet which details the requirements for cooling components that dump as much heat as you describe but I cannot give such information here (forum rules)

 

[neo-omega]

cant you load it up as a google docs and then link it here?