Hello, First of all this is my first post, so hey everybody. I've recently bought a new bunch of hardware and got into the whole cooling thing, having always been a programmer and just building my PC I generally never went for such extreme systems before but now I've started I'm hooked. I built a PC with the following specifications: CPU: AMD x6 1090T Mobo: ASUS Crosshair IV Mem: Kingston HyperX 4x2GB Graphics: Sapphire ATi Radeon HD 5970 PSU: Corsair 1000w That is the basic system, in an Antec 1200 case. With that I bought a Corsair H50 "water cooler", pre filled closed loop system, and so far so good with that, my idle temperatures are around 32 C and 52 C under load overclocked at 4 GHz stable, with the memory running around 1550 MHz. I play quite alot of games now, and I have been getting the itch to upgrade to full on water cooling with a dual loop system to cool the CPU and GPUs, but I'm a bit nervous. The H50 is a great product, it does the job really quite nicely, I adapted it slightly and put the fan that came with it in the bottom of the case for additional air flow, and setup a push-pull system on the radiator using 2x Akasa Viper fans (pretty yellow ones). I just put some well hidden cathode blue tubes in there and got a HyperX memory cooler fan setup, but I want lower CPU and GPU temperatures. So far my research indicates I'm better off using a non conductive fluid as my biggest fear is smoking this hardware I love. So I'm thinking of using this: Feser One UV Blue Cooling Fluid 1 Litre Feser One UV Blue Cooling Fluid 1 Litre | Ebuyer.c... (As you may have noticed I'm in the UK so I have to find a UK supplier for any products) My question is, if I want to fit a water block to the CPU and the 5970 graphics card, will I need a dual loop system as I suspect? I am looking for the ultimate cooling performance that I can achieve (without being unrealistic), and I've seen a few nice looking blocks for the 5970 GPUs. The AM3 CPU seems to be available from a whole bunch. Would you people who know about this sort of thing have any recommendations of what to do in this situation? I am eager to buy and get going but I don't want to make a fool of myself and buy crap and get poor performance or worse still blow my hardware to high heaven with leaks where I was too much of a noob to do my research. Any help is hugely appreciated and I apologise for the essay! Thanks, Lee.