#1, you are OC'ing the i7, so immediately expect your temps to be higher, although Skinnee's tests were done on an OC 920 @4ghz and gave moderately decent temps in the 60's and 70's Celsius. Now, with that in mind, it would possibly be a decent cooler if you never intended on watercooling GPU's...which let me be honest...was my next step once I watercooled my CPU. Regardless, i've seen a few things on the H70 which is supposed to be a replacement for the H50 is supposed to be released soon, but I doubt there are any tests done on it yet. I'd hope it would be better, but I (correction: WOULD NOT) recommend the H50, Thermaltake Bigwater or Zalman Reserator to ANYONE. Sorry, in my book, these are gimmicky attempts to entice entry WC users into coughing up money before they figure out the kits are bunk and not worth the pretty box they come in.
In my mind. The H50 is as much of a water cooler as any heatsink with heat pipes... well they both have water in them and the performance is actually closer to high end air coolers with heat pipes anyway.
Zalman reserator and Bigwater is perhaps a bit closer to real water cooling system but honestly they are priced too close to full water system too. I can't recommend them at all.
I owned the H50 and i clocked to 3,6 ghz and got 50C norm and 80 load. Tryed prime 95 for 15 min and puff my mobo was gone(asrock extreme 58)
Before i had a Zalman 9900 it was a litle better than the H50. But know i changed my H50 to Noctua NH-D14 and there is a world in difference. Its 42 idle and 50 load - all the way up to 3,8 ghz samme temps i´m impressed!