I'm looking to upgrade to watercooling, as to get decent temps on my GPU and in my case, I have 7 fans installed, and I realized water cooling was a more efficient and more quiet solution. I am, however, on a limited budget. My case is the Fractal Design Arc Midi.
My CPU is currently overclocked to 4.2ghz, reach max temp of 70 C during a 16-hour prime95 run, at 1.16-1.17 volts. My GPU is overclocked using GPU boost to 1189mhz, and with my new fan setup, I get 70-73C max temps during 2 hour sessions of Shogun 2, one of my most graphically demanding games. The Witcher 2 gets the same temps, as does Skyrim with heavy visual mods/ENB.
I'm hoping, along with the quieter sound, to get lower temps; I'd be happy with losing 20C off both my GPU and CPU max temps, however I don't know if this is realistic with my proposed setup. My budget is $350, although if I must, I will go over that, but to no more than $420.
Here are the options I'm considering:
The main thing I'm worried about with the kit that has the DDC pump is that the DDC pump isn't that good. The EX240 is $50 more, but once again, I don't know if the pump is worth it. And the main reason I'm throwing the EX420 with the 360mm rad in there is because I'm worried 240mm won't be enough.
Which pump would suit my needs best? I'll be getting, if not right away, this XSPC GTX 680 waterblock for my GTX 670 (which uses a reference 680 PCB), unless that's not very good and you guys suggest something else.
I was thinking that if I wasn't happy with the cooling a 240mm rad was giving me for CPU+GPU, I could simply add a $40-$50 single 120mm rad to put in the back rear fan position of my case. That would help right? The radiators don't individually cool each component?
Also, I'm confused with ID, OD of tubing, barb/compression sizes, and thread sizes. Which have to be compatible with which? I need to know this for when I order one of the kits, it asks me to choose, and I just want to make sure the kit will be compatible with whatever waterblock I get.