Originally Posted by nleksan
Just keep in mind that even completely stock, you have a 130W processor rather than the 95W 2500K/26-2700K or 77W ivy Bridge. Now, Ivy Bridge has its own problems, but even so you are putting out 30-45 percent more heat at stock speed than the other processor families.
Also, while the closed loop coolers are convenient, I worry about their long term function, as some amount of liquid will evaporate through the tubing over time, reducing the ability of the cooler and unlike a custom loop, it cannot be simply topped off.
A custom system can be designed to specifically suit your exact needs in every way, while the sealed units are by definition a significant compromise in order to be able to work with every modern processor socket. This is a bad thing, IMO, for performance.
Also, for every 10C you can drop the average operating temp of a component, you approximately double its expected lifespan. The components that most benefit from this are GPUs, which can go from 70-90C under load on air to just 40-50C on water. CPUs typically experience a more mild but still very significant drop, perhaps from 75C to 55C during Prime95, the exact amount depends on how much radiator space you have, the flow rate, the quality of the block/pump/rad/rad-fans, and how many total components are being cooled.
Since you already have most of what you need for a CPU loop, I would just sell/return the H100 and buy an XSPC EX420/EX360 or Alphacool NeXXos UT60 420/360 rad, a few fans (Bgears Blasters 140mm for 420 rad or any one of two dozen great 120mm fans for 360 rad), and some tubing and fittings. Run distilled water with a Kill Coil and a few drops of PTNuke PHN and you will have a setup that is orders-of-magnitude better in every way possible than the H100.
What you say makes sense, very logical actually. FYI, I borrowed an Alphacool ST30 and some fittings just to mockup a custom-loop, as I have never built a custom-loop before, it's difficult for me to determine if a bay-res or stand-alone reservoir is best:
I like the 35X pump with its PWM control, but I worry about it heating up in a bay-res.
Maybe it's an over-active imagination, but a custom-loop seems complex; checking the fittings for leaks, leak testing, changing the coolant every 3 to 6 months, etc. I like simplicity, which was why the H100 appealed to me, until I read so many bad posts about it.
Originally Posted by The_Hairy_Yak
There is no reason to go custom WC unless you are adding your GPU to the loop. IMO that is the only reason to go for a custom vs a Corsair H*. If you already have good fans a H80 in push/pull will perform just as good as any other setup for anything other than benchmarking. The only think that might put that into question would be a really heavily loaded cpu (server/folding/crunching). A custom loop is flashy/cool looking, but doesn't REALLY offer any benefits to daily CPU processing.
What you say is very logical too. Is it really worth the effort building a custom-loop, for a CPU only, when 75% of the time in Window's the CPU will be idle and the custom-loop won't be cooling down the CPU any more than an NH-D14 SE2011 or even an H100? The only time the CPU will ramp up to 100% is likely to be when I'm gaming. You're right in what you say. FYI, I've no intention of water-cooling my GPU, the air cooling is fine, I think.