Rad choice:480 vs 2 x240?

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Hi

I am starting to build watercooling loop for my system in a few days and was wondering, is there any significant difference/advantage of using 2 x 240 rads vs 1 480.
I have a 4770k and I am planing to oveclock it, as for gpu I am planing to buy a Radeon 290.
As for a pump, I was planing to buy a XSPC D5/Cube res combo.
Now, the problem is:
1. If I use the sinle 480 rad, the water will go from Pump/res to cpu block, then already heated up a bit to gpu, then to rad and back to res/pump. I don't want to have heat problems on my gpu.
Do you think there would be any?

2. If I use 2 x 240 rads, the water will go from pump/res to cpu block, then to rad, then to gpu, then to second rad and back to res/pump. Problem is the placement of rads. I can install one on the side of the case or behind it, but second one would have to be located under the case. The placement is specific to the project and cant be changed. If I place 2nd rad under the desk, it will take 50-60cm of tube to get from gpu to rad and same amount to get frrom rad to res/pump. Is single D5 strong enough to handle loop going through 2 240 rads, cpu and gpu blocks and 2 - 2.5 m tubing?

Those are only options I have, apart of going for 2 pumps and I would prefer to avoid any additional costs.

Let me know which one of those 2 options is better or if my concerns are right.

Cheers
BH
 
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Bart_Hunt Well i run xspc 720 pump/res combo thing.
I had cpu+gpu on 1x320 rad Temperatures ware good
Then i added another Thick 120 rad in between CPU and GPU.
Temperatures on GPU dropped 1-2c.

Conclusion ?? Lost flow extra bends and stuff ware not worth it !!!

Those new cards are good to go up to 90c so cpu wont heat water up enough to make any difference to gpu itself.

I am going back to one 360 rad setup i think.
 
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