Well, I decided to do it. I am adding an Alphacool 140mm x 45mm Crossflow radiator this weekend over the rear opening.
Since this was my first loop, I am glad I went with soft tubing. It left a lot more flexibility as I dialed in my system. This will be my fourth time modifying the loop.
I decided i did not need an additional pump at this time, but I built in support for it if I need it in the future.
I will be moving my serial CPU to GPU loop to a parallel CPU/GPU loop for looks. Based on a lot of the research I seen, it should not affect my thermals to much. My CPU block is supposed to be relatively low restriction.
I also switched my flow around.
Yeah, I know flow doesn't matter and loop order doesn't matter, unless you are trying to squeeze out as much efficiency as possible
My case is small and I am about to max out the radiator space available. So if I can optimize I may gain a few C. I used to do HVAC so I know this will give me a little better heat exchange on the new rear radiator.
OLD Loop order: Pump/Res > AQ Flow Sensor > Temp probe > Front 280mm INTAKE radiator > Top 280mm INTAKE radiator > temp probe > CPU > GPU > Back to Res.
My current loop would have had the Front and then the Top INTAKE (Ambient) Radiators cool the coolant down as much as possible. Then it heads through the Rear EXHAUST which tries to further cool the already cooled water using case air 12 to 15 c higher than ambient. I am quite sure that insufficient heat will be exchanged and might even result in a net loss.
NEW Loop order: Pump/Res > parallel CPU/GPU loop > temp probe >Rear 140mm EXHAUST radiator > Top 280mm INTAKE radiator > Front 280mm INTAKE radiator > Temp probe > AQ Flow Sensor > Back to Res.
By flipping the loop around I will get the water at it's hottest (after the blocks) and then run it through the Rear EXHAUST radiator. Since the water is at its warmest, it will get better heat exchange with the warm case air. This way the Rear 140 will act as a pre-cooler for the two 280mm Radiators that are sucking in pure Ambient goodness.
After this I will have 700mm x 140mm of Radiator in full Push/Pull on a Mid ATX case, and 560mm of that on Ambient intake! I am hoping to be gaming at 9c after this.
One of the benefits of me rethinking the loop order is that I started thinking outside the box. First I thought about running the parallel CPU/GPU loop.
Then I said, well if this looks as good as I think this will, I should be soon be ready to hard-line. So I am now in the process of trying to 'straighten out' some of my loop runs now, to make it easier to add Acrylic tubing later on. The crossflow radiators I used saved me a bunch of tubing runs so the case will be real clean after this modification. I figure during Christmas Vacation it will be time to do me some hard-lining.
I will try to post some build pictures as I go. Cleaning out radiator tonight with Blitz Part 1.