When set to its Silent profile, the H2
O 920 impressed us with its LGA1155 cooling, keeping our overclocked Intel Core i5-2500K at 52˚C above room temperature at full load. However, this is 1˚C higher than the Thermaltake Frio at its low fan speed, and saw the H2
O 920’s cooling fans spin up to a quiet, though not inaudible, speed of 1,500rpm.
It was a different story when we set the H2
O 920 to its Extreme profile, though, with the cooler producing a chart-topping delta T of 46˚C under load, 3˚C lower than the Frio in the same test. At this setting, the fans spun at a very noisy 2,500rpm, though, which would be intolerable during everyday use.
NOTE: We've removed the AMD cooling figures, as we've since found an irregularity with the AMD thermal test system. Bit-tech prides itself on being accurate first and foremost so we don't want to publish possibly inaccurate information for a second longer than necessary. We will update the situation as soon as possible.
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With its excellent cooling, customisable lighting and option to configure fan speeds from the desktop, the Antec Kühler H2
O 920 certainly goes further than any liquid cooler we’ve ever seen towards justifying its price premium.
However, £80 for a CPU cooler is still a little galling; that’s double the price of the Frio, which performs similarly on LGA1155 systems – and at ear-friendly fan speeds.
For many, the price will be too high, and for cooling CPUs at stock or mildly overclocked frequencies, a conventional air cooler makes more sense.
However, for those wanting to push their CPU to its limit, the H2
O 920 is a well-made, easily configurable cooler with bags of performance, offering a welcome halfway house between air cooling and bespoke water cooling.