I see here in the forum lots of people advising dual loop imho its a flawed concept.
I get the idea behind the dual loop but to me it just dose not make sense.
Dual ore triple rad setup on the other hand make's perfect sense to me.
For argument sake we have a setup whit 1 CPU 150W and 2 GPU's whit 2x 150W heat dissipating and we are using 2x 240mm rads.
(And yes you can use different size rads but the argument still holds that you always bound by eider GPU ore CPU depending on what your doing and that part need the cooling the most)
Yes your CPU will be a little cooler whit a dual loop but at the same time your GPUs will be hotter, because your only loading your CPU rad to 50% ware your GPU rad has a 100% load on him.
(and yes this is not totally correct way of using load Nr's, but it keep's the discussion simpler)
So even do you can OC your CPU a little higher your GPU OC will be lower if you have load on both your CPU and GPUs.
If you on the other hand use a dual rad setup you are going to load both rads up to 75% giving you 50% extra cooling on the GPUs and 25% less on your CPU imho that is a big win and a little loss.
Also when i measure the intake and the outlet on my current rad i only have a 1.7 degree Celsius different's in temp (*)
(*)i7 920 @ 3.9GHz and a 5870 @ 920Mhz on a magic cool slimline 240 and Swiftech MCP655 pump
So your CPU temps are not going to spike suddenly.
So if you have a pump > rad > CPU > (pump >) rad > GPU > GPU > pump setup you still have your CPU cooler then your GPU even do CPU is gone run a little warmer your GPUs are gone run a lot cooler because your getting cooler coolant in to your rad.
Also your CPU rad is going to have a higher delta because its warmer and will have a higher temp difference whit the intake air so you that one gets more efficient, on the other hand your GPU rad is doing the opposite, but overall i think you still win a littel.
but overall i think you gone win a bit, on games that are not really CPU/GPU bound and have a good balance, your win is not extreem, but if our a Folder ore encode video, that is eider GPU ore CPU bound you going to win big because you get cooling help from the second rad.
*** games max out the GPU and/ore CPU they don't max them out thermal, ware Folding and video encoding like programs do max out a possessor but only one of them, not both CPU and GPU
So i think in all whit a dual rad you can have a higher OC then whit a dual loop, in all a win win situation.
My 2 cents
I get the idea behind the dual loop but to me it just dose not make sense.
Dual ore triple rad setup on the other hand make's perfect sense to me.
For argument sake we have a setup whit 1 CPU 150W and 2 GPU's whit 2x 150W heat dissipating and we are using 2x 240mm rads.
(And yes you can use different size rads but the argument still holds that you always bound by eider GPU ore CPU depending on what your doing and that part need the cooling the most)
Yes your CPU will be a little cooler whit a dual loop but at the same time your GPUs will be hotter, because your only loading your CPU rad to 50% ware your GPU rad has a 100% load on him.
(and yes this is not totally correct way of using load Nr's, but it keep's the discussion simpler)
So even do you can OC your CPU a little higher your GPU OC will be lower if you have load on both your CPU and GPUs.
If you on the other hand use a dual rad setup you are going to load both rads up to 75% giving you 50% extra cooling on the GPUs and 25% less on your CPU imho that is a big win and a little loss.
Also when i measure the intake and the outlet on my current rad i only have a 1.7 degree Celsius different's in temp (*)
(*)i7 920 @ 3.9GHz and a 5870 @ 920Mhz on a magic cool slimline 240 and Swiftech MCP655 pump
So your CPU temps are not going to spike suddenly.
So if you have a pump > rad > CPU > (pump >) rad > GPU > GPU > pump setup you still have your CPU cooler then your GPU even do CPU is gone run a little warmer your GPUs are gone run a lot cooler because your getting cooler coolant in to your rad.
Also your CPU rad is going to have a higher delta because its warmer and will have a higher temp difference whit the intake air so you that one gets more efficient, on the other hand your GPU rad is doing the opposite, but overall i think you still win a littel.
but overall i think you gone win a bit, on games that are not really CPU/GPU bound and have a good balance, your win is not extreem, but if our a Folder ore encode video, that is eider GPU ore CPU bound you going to win big because you get cooling help from the second rad.
*** games max out the GPU and/ore CPU they don't max them out thermal, ware Folding and video encoding like programs do max out a possessor but only one of them, not both CPU and GPU
So i think in all whit a dual rad you can have a higher OC then whit a dual loop, in all a win win situation.
My 2 cents