Thermalright HR-22 CPU Heatsink

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TEST RESULTS

Test Results: Thermalright HR-22
Fan Voltage
Single Ref. 140 mm Fan
Dual Ref. 140 mm Fans
SPL@1m
Thermal Rise
SPL@1m
12V
29 dBA
37°C
35°C
32 dBA
9V
22~23 dBA
39°C
36°C
25 dBA
8V
19 dBA
40°C
37°C
21~22 dBA
7V
15 dBA
42°C
38°C
17~18 dBA
6V
12~13 dBA
44°C
39°C
15 dBA
Measuring mic positioned 1m at diagonal angle from the center of the heatsink.
Ambient noise level: 10~11 dBA.

The HR-22, mounted on our system with the minor adjustment described earlier, provided excellent results: Thermal rise above ambient of 44°C at 5V and 37°C at 12V using our reference Noctua NF-P14 fan. It was resilient as the fan speed was reduced, never heating up by more than 2°C at each step.

While mounting a second fan on the heatsink itself isn't supported, its size seemed suitable — it is precise what would happen anyway if the duct was used to couple the heatsink to the case exhaust fan — so we strapped one on with a couple of zip-ties. Typically we see a 2~3°C reduction on an average high performance heatsink after adding a second fan which often isn't enough to justify the increase in noise. The HR-22 bucked this trend hard, becoming increasingly effective as the fan speeds were slowed to quiet levels. At 7V and 6V, there was a 4°C and 5°C advantage respectively. When we tested the HR-02, it also displayed surprisingly strength in this scenario.

Passive Cooler Comparison: Thermal Rise
(Core i7-965 @ 3.2 GHz, 1.2V, Prime95, half load)
Time Elapsed
Thermalright HR-02 Macho
SilverStone Heligon HE02
Thermalright HR-22
NoFan CR-95C Copper
Start
14°C
14°C
14°C
15°C
1 mins
41°C
37°C
34°C
41°C
2 mins
48°C
43°C
39°C
49°C
3 mins
53°C
49°C
42°C
53°C
4 mins
59°C
54°C
46°C
55°C
5 mins
65°C
60°C
50°C
57°C
6 mins
71°C
64°C
54°C
58°C
7 mins
76°C
68°C
58°C
59°C
8 mins
79°C
73°C
61°C
60°C
9 mins
FAIL
76°C
64°C
61°C
10 mins
FAIL
68°C
11 mins
72°C
12 mins
75°C
62°C
13 mins
78°C
14 mins
FAIL
>15 mins

As a passive heatsink, the HR-22 isn't stellar, but it is better than most, lending credence to Thermalright's claim that it can adequately cool a high-end CPU with system fans alone (with the heatsink ducted to the rear exhaust fan). During our half-load fanless test, with each passing minute the thermal rise increased fairly consistently by between 3°C and 4°C, significantly slower than the HR-02 and SilverStone HE02. While the temperature never showed any signs of stabilization, eventually failing our test, it survived a full 5 minutes longer than its little brother.

HEATSINK COMPARISON TABLES

°C Rise Comparison:
CPU Coolers with Single 140 mm Reference Fan
Heatsink
Fan voltage / SPL @1m*
9V
(~21 dBA)
7V
(~15 dBA)
6V
(~13 dBA)
Thermalright Archon SB-E
37
40
42
Noctua NH-U14S
38
41
44
Thermalright HR-22
39
42
44
Prolimatech Armageddon
39
42
45
Scythe Mugen 4
39
42
45
Thermalright HR-02 Macho
39
43
45
NZXT Havik 140
40
43
47
Scythe Ashura
41
44
46
Noctua NH-C14
(top mounted)
40
44
48
Noctua NH-C14
40
44
49
Thermalright Silver Arrow
39
45
49
Phanteks PH-TC14PE
42
45
48
SilverStone Heligon HE02
45
48
50
be quiet! Dark Rock 2
49
51
53
*Note: there are minor differences in measured SPL due to the variety of fan orientations and mounting methods offered by the compared coolers.

Paired with one of our reference 140 mm fans, the HR-22 lands a top three spot, just behind the Noctua NH-U14S. Given its size and price, we wouldn't expect any less, though it's notable that the smaller and cheaper HR-02 trailed by about 1°C.

°C Rise Comparison:
CPU Coolers with Dual 140 mm Reference Fans
Heatsink
Fan Voltage / SPL*
8V
(~21 dBA)
7V
(~17 dBA)
6V
(~14 dBA)
Prolimatech Genesis
36
37
39
Thermalright HR-02 Macho
36
37
40
Thermalright HR-22
37
38
39
Noctua NH-C14
37
39
41
Thermalright Silver Arrow
37
39
41
Noctua NH-U14S
39
39
40
Noctua NH-D14
38
40
42
Scythe Mugen 4
39
40
42
Phanteks PH-TC14PE
39
41
43
NZXT Havik 140
39
40
43
Scythe Ashura
40
41
43
SilverStone Heligon HE02
43
44
46
*Note: there are minor differences in measured SPL due to the variety of fan orientations and mounting methods offered by the compared coolers.

Like the HR-02, the HR-22 benefits greatly from a second fan at low fan speeds, but not enough to overtake its little brother. In this dual fan configuration, the HR-22's more rotund body turned out to be a hindrance, with the push-pull setup not quite as effective.



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