LGA2011 CPU Cooler Review Roundup
Intel RTS2011LC
Underwhelming in the extreme
Intel isn’t shipping stock heatsinks with Sandy Bridge-E CPUs, perhaps assuming that consumers of $600 and $1,000 CPUs are going to want performance a little better than Intel’s stock coolers have typically provided. Instead, Intel is offering a branded liquid-cooling loop as an optional accessory. The Asetek-built cooling loop features a glowing blue Intel logo and a bright blue LED on its single 12cm fan, but otherwise looks nearly identical to the Antec Kuhler 620, which was also built by Asetek (which also built AMD’s Bulldozer-branded liquid cooling loop).

Yet another single-fan all-in-one liquid CPU-cooling loop.
The RTS2011LC uses Asetek’s low-profile pump unit/heat exchanger and a 120mm radiator that’s less than an inch thick and mounts in place of a stock case fan (typically the rear exhaust fan). The heat exchanger mounts to the LGA2011 socket using Asetek’s standard barb-and-ledge mounting system, although with big solid posts instead of the flimsy screws and plastic clips Asetek used to use. The PWM fan plugs into the pump, which plugs into the CPU_FAN header.
Alas, the cooler’s single fan and radiator were no match for any of the air coolers in our roundup save one. The RTS2011LC tied with the Zalman CNPS12X for last place, and its 12cm fan was irritatingly loud at full speed. For stock-clocked chips, the Intel cooler is fine. It’s quiet when not fully ramped up, and it doesn’t block any RAM slots, unlike the Noctua and Zalman coolers. But for an overclocked Sandy Bridge-E CPU, the Intel liquid cooler is louder and hotter than the Cooler Master, Noctua, Xigmatek, and NZXT coolers, and more expensive than all but the Noctua, which is just $5 more. If you want a great liquid-cooling solution for an overclocked LGA2011 chip, keep looking.
Specifications
| Dimensions HxDxW (inches, with fans) |
6x2.6x4.75 |
| Weight |
1.25x2.5x2.5 (circular) |
| Heat pipes |
1lb, 12.5 oz (total) |
| Stock Fans |
1x 12cm PWM |
| Add’l Fan Support |
1x |
Easy install; good build quality; quiet at low temperatures.
Loud at high temps; doesn’t cool as well as a $30 air cooler.
$80, www.intel.com
Corsair H100
Double your radiator space, double your fun
Another all-in-one liquid-cooling loop! Hooray! Corsair’s H100 is its fifth liquid cooler; after two with Asetek, the company has put out three with CoolIT. The H60 is your standard 120mm radiator-with-single-fan, the H80 is the double-thick double-fan version, and the H100, the first Corsair liquid-cooler to support LGA2011, is its first cooler with a 240mm radiator.
The H100’s radiator is around an inch thick and 10.8 inches long and fits in any case that can accommodate a 240mm radiator, though some cases may not have the vertical clearance to mount the fans inside the case. The pump/heat exchange unit is square, and very slightly taller than Asetek’s. It contains four 4-pin PWM headers to control the radiator fans, as well as a connector for Corsair’s Link system control software/hardware combo (sold separately). There’s also a three-speed fan-control button on top of the pump. The pump unit itself has a 3-pin motherboard fan connector and a 2-pin Molex for power. The cooler unit mount is simple; four double-sided thumbscrews mount to the unified backplate, the brackets at the corners of the pump unit slide onto those, and more thumbscrews secure them in place.

The H100’s 240mm radiator supports up to four 12cm fans, and the pump unit
We mounted the radiator to the top panel of our Thermaltake Level 10 GT test bed, with the fans on the inside pushing air through the radiator out of the case. In this configuration, with the H100’s fan speed set to medium, the Corsair cooler lowered our CPU’s burn temperature to 69.2 C—the best of any cooler in our roundup. Even with the fans at their lowest setting, the H100 was a match for the air coolers in the roundup.
Its 240mm radiator won’t fit in every case, and it’s the most expensive in our roundup, but the H100 is a competent, quiet liquid cooler and the best LGA2011 cooler we’ve yet tested.
Specifications
| Dimensions HxDxW (inches, with fans) |
10.8x2x4.7 |
| Weight |
1.6x2.6x2.6 (square) |
| Heat pipes |
2 lbs, 2.5 oz |
| Stock Fans |
2x 12cm, 3-pin |
| Add’l Fan Support |
2x |
Quiet; excellent performance; easy install; supports up to four fans.
Won’t fit in every case; need to open case to adjust fan speed; expensive.
$110, www.corsair.com