i want see if you can use the corsair h50 for the cpu cooling and koolance exsos 2.5 for cooling my 3 of gtx 480 hyro copper for a 3 way sli also cool my motherboard. Could you do that with a corsair 800d .
You need 2 times that radiator not counting the CPU. You need at an ABSOLUTE Minimum a 120X4 for just the GPUs in thir own loop with thier own pump and radiator. I'd get a 120x3 and a 120x2 for the GPUs if you want quiet and cool temps. The GPUs is NINE HUNDRED WATTS OF COOLING for three of them.
The CPU can go with the stuff you posted, all by itself. I have no idea what your CPU is, your ambient temps or your overclocks. So I could be wrong.
cjchrism, Conundrum knows his stuff. He is right on the money with what he is telling you.
The kits you are talking about using off the shelf do not have enough radiator or pump to be able to cool your components. Th ekits in question are actually just about as good as high-end air cooling with regards to their ability to cool for about twice the price you would pay for that self-same air cooling.
To get effective water cooling, you will have to either build a custom rig or have someone else build it for you. The price Conundrum posted is just about right, and in reality, he is giving you a sweetheart deal on the labor and expertise needed to put it all together. If I were you, I would either take him up on the offer or scuttle your way up to his stickied thread and start educating yourself.
You are already talking about thousands of dollars in components just for what you already have...it would only make sense to cool it with what Conundrum has outlined than to try to cobble together two questionable kits and expect to get better-than-air performance. Why not spend a little bit more time and money and learn how to build your own loop? Trust me, if you already have the knocks to build your own computer, it won't take all that much more ambition to jump to the next level.
Those of us who overclock would love to be able to afford the hardware you are describing. But then, it wouldn't be much of a challenge to get top-level performance out of top-level parts, would it? The real challenge is to get that same level of performance from components that cost a fraction of what you have laid out for your computer.
Those of us who have done this long enough will overspend on kit to cool the computer and scrimp on the components that we end up overclocking, because, more often than not, all that cooling kit ends up in the next build.
More often than not, it is about the journey, and not the destination. If your end goal is to have a rig that blasts all the other kiddies outta the water at your next lanparty, then get someone else to build your rig for you. If, in the end, you are actually interested in learning something new that you can build on, go read Conundrum's stickied thread and start educating yourself.