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QUOTE (Bitter @ Jun 1, 2014 - 9:11 AM)

>I'd rather do a water loop with a massive passive radiator, that's much cooler.
If you add some ethylene glycol antifreeze to the cooling water it becomes more efficient by a noticable amount. I noted a 5-8c drop in all temps with the addition of a slight amount, about 4:1 water:eg. It was about 8 months after I installed the water block with arctic silver under it so it wasn't coincidental temp drop from the AS setting up or anything, cpu temp and coolant temp's both dropped, the eg added a little viscosity and made the water a little 'stickier' so it dropped heat better in the radiator I think. I used plain green, but you toyota freaks may want to use Toyota Red.
I use a pre mixed formula from XSPC, it has all the chemicals for it already mixed. I also used some flush formula to begin to make sure that the loop had no debris in it. The coolant in my res is still nice coloured, so I think the washout helped, and some debris did come out with the wash.
My temps were around 45-50C at first, but after the AS5 settled (It officially takes 200 hours, but mine settled in around 110), and after settling it now sits at 30C on both GPU and CPU at idle.
My loop runs as follows:
Res/pump -> CPU -> GPU -> Front 200MM Radiator with no fan -> Top 240mm Radiator with x2 SP120mm fans -> Res/pump
Under full load, 40C.
CPU: i7 2600K
GPU: AMD Radeon R9-290X