Antec Kuhler H20 650
WHAT WE LIKED:Dual Reservoir, excellent cooling solution, easy installation, built-in temperature indicator, low block clearance
WHAT WE DISLIKED:Bulky fan with pump
Our test setup is as follows:
CPU: AMD FX-6300
GPU: Gigabyte R9 280x Windforce
RAM: G.Skill Ripjaws 16GB (2×8)
PSU: Raidmax RX-1000AE
DRIVES: 320GB Western Digital 2.5″ , 2TB Western Digital 3.5″
Cpu Cooler: Antec Kuhler H20 650
Case: NZXT Phantom 630
All tests are run using Tuniq TX-4 thermal compound for comparison purposes. The CPU and heatsink was cleaned with rubbing alcohol and Tuniq TX-4 was reapplied. Tests are run at stock (3.5GHz [with 4.1GHz Turbo Boost]) and an OC at 4.8GHz (no Turbo Boost). The system is left to idle for 20 minutes and a baseline temperature is recorded using HWmonitor and confirmed by OCCT sensors. An OCCT test using Large Data Set was ran for 20 minutes and the temps are recorded again. The recorded temperature is the average of the 6 cores. Since ambient temperatures can affect CPU temperature readings ambient temps are recorded during idle and full load testing. The ambient temperature is then subtracted from the recorded CPU temperatures resulting in a Delta T measurement, (or how many degrees above ambient the CPU cooler keeps the CPU). This levels the field for different ambient temperature tests.
As stated, the Kuhler H20 650 was tested running stock settings and then overclocked to 4.8GHz, I ran the same tests compared to the AMD FX-6300 stock cooler, ThermalTake 2.0 Pro and a custom loop.
As we can see, the Antec 650 had a huge 14 degree drop from the ThermalTake 2.0 with only a difference of 6 degrees under load compared with a custom loop. Next, we’ll see how it handles under the stress of an overclock.
Under a 4.8GHz overclock the Kuhler H20 650 really showed its true colors, beating the previous leader by a full 14ºC and was only 11ºC behind the custom loop on full load, I was quite surprised at how well this performed and wasn’t expecting this much of a temp difference. Granted this isn’t the most powerful loop out there but it did perform exceptionally well.
The LED on the block was an added bonus; the temperature changes as the temperature becomes hotter. From cool to hot, the colors cycle through from a light to dark blue and then change from a light to dark tint purplish.