I have a CSP 750 black dtek version with a spiral block and a single 120mm heatercore. It is cooling a mobile athlon xp that is at 2.6ghz @1.8v. My temps are 41ish(+/-2C) idle and under load it maxes out about 51-53C. I am going to add a DD maze4gpu block to my new 6600gt but from a previous thread everyone decided that the single pump would be enough to cool both blocks. Should I upgrade to a DD RBX or TDX ($35 and $45 respectively) while I add the gpu block? Can a single CSP750 handle this setup? Any input is greatly appreciated.