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How many rads can fit inside R4 case?

post #1 of 3
Thread Starter 
I'm thinking of a doing a fully watercooled rig (only CPU & 2 GPU, no MOBO or RAM). The goal is to make it as silent as possible, even under full load. I'm not thinking of overclocking much, just a bit for the CPU to brighten up the system and push the GPU to full throttle without OC.

I have read numerous times that if given enough radiators and fans, the fan speed and pump can be dialed down to medium or even lowest speed, while maintaining 50-60C under full throttle. The system I'm planning for right now is 4670k with reference 290x, possibly dual 290x, but not sure yet. If this is the case, how many radiators would I need to achieve it? Is it possible to fit all those into a Fractal R4? If it is achievable, how many rads would I need? How many of each size?

Thanks everyone in advanced for helping me out.

Another quick question, I've thought of dual pump, not for performance but simply as a backup, in case one fails. Is it possible to have them in parallel, using a Y-splitter to feed them into same tube. Will the pressure be too high?
Edited by billyboy8888 - 4/25/14 at 1:34am
post #2 of 3
Generally, the rule is 1x120mm per waterblock with an extra 120mm for headroom. So, I would say you'd want ant least 480mm of total radiator space if you go dual 290x. That could be 2x 240mm rads, 1x 120mm and 1x360mm rads, 4x 120mm rads, etc. Having more than that will allow you to run the fans slower and maintain good temps.

Having a set of fans on each side of the radiators, push+pull, helps performance and allows you to run lower fan speeds as well.

I'm not sure what that case can hold though. I'm sure there is a Club here for that case were people have posted pictures of their loops. Just look at those and see how they did it.

For dual pumps, don't run parallel. You want them in series, one after the other. If one dies, the other will pick up the slack
post #3 of 3
Quote:
Originally Posted by morencyam View Post

Generally, the rule is 1x120mm per waterblock with an extra 120mm for headroom. So, I would say you'd want ant least 480mm of total radiator space if you go dual 290x. That could be 2x 240mm rads, 1x 120mm and 1x360mm rads, 4x 120mm rads, etc. Having more than that will allow you to run the fans slower and maintain good temps.

Having a set of fans on each side of the radiators, push+pull, helps performance and allows you to run lower fan speeds as well.

I'm not sure what that case can hold though. I'm sure there is a Club here for that case were people have posted pictures of their loops. Just look at those and see how they did it.

For dual pumps, don't run parallel. You want them in series, one after the other. If one dies, the other will pick up the slack

+1 to all of the above. The only thing I have to addf to it is some testing results to back it up:

Multi Pump Setups – Parallel vs. Series

http://martinsliquidlab.org/2011/04/26/pump-setup-series-vs-parallel/

The takeaway:
Quote:
Conclusion

Parallel pump setups are very clearly a poor choice for water cooling. Not only is the performance benefit very small and only some benefit for very low restriction loops, it also barely manages to provide enough pumping power for redundancy. Series setups give you double the head pressure of a single pump and that increased head pressure is tuned ideally for water cooling’s high restriction nature. I will caution that running two pumps in series and the resulting increased flow rate does work your pumps harder, so you should consider additional cooling particularly with DDC pumps. I would also advise that dual pumps is not something that will normally net large measurable temperature gains, it’s generally reserved for those that are in search of that last degree in performance…or for those with extremely large, complex, and restrictive loops.

Bottom line….Use Series setups in multiple pump configurations, do not use parallel pump setups. There is really no advantage to using parallel over series, series is always better for watercooling.
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