CoolerMaster Hyper 6 Heatsink for P4/K8

Cooling
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TEST RESULTS

First with the stock fan...

Hyper 6 w/stock fan
Fan voltage
°C Idle
°C Load
°C Rise >ambient
°C/W re TDP
°C/W re MP
12 V
32
40
16
0.23
0.21
7 V
33
43
19
0.27
0.24
5 V
35
47
22
0.32
0.28

The performance at all fan voltage levels is excellent, but the noise is terrible. At 12V, the stock fan exhibits a low-mid frequency motor noise that is audible anywhere in the test room, and even a decent distance right down the hall when the door is open. Worse than those acoustics, however, is the vibration; this fan shakes like it caught the bad episode of Pokemon and went into convulsions. Attached to the Hyper 6, the vibration conducts into the entire assembly, further exacerbating noise by exciting the entire testbed into a full sound and fury fiesta.

Absolutely, positively no SPCR community member in their right mind would ever want this thing blasting away at full throttle in their rig. The thing that really surprises me is Cooler Master's decision to not utilize one of their Rifle Bearing fans, which, from my experience with two samples so far, is a dramatically superior fan.

While much better behaved at 7V, the stock fan is still not quiet. Vibration from the stock fan diminishes, but it is still there. Even at 5V, while vibration is finally insignificant, the motor noise is still plainly audible. So much for ultra silence.

With the Panaflo 80L...

Hyper 6 w/Panaflo 80L fan
Fan voltage
°C Idle
°C Load
°C Rise >ambient
°C/W re TDP
°C/W re MP
12 V
32
41
17
0.25
0.22
7 V
33
46
22
0.32
0.28
5 V
35
55
31
0.45
0.40

What blessed relief after the stock fan! At 12V, the Panaflo almost matches the performance of the stock fan at subjectively half the noise. But for most SPCR readers, it is still too noisy. At 7V, the cooling performance is still excellent, and the noise drops to a level that many would judge as very quiet. You can see the dramatic increase in temperature as the airflow drops to <10CFM at 5V, but at this voltage, the fan is essentially inaudible inside a case.

With dual Panaflos 80L in Push-Pull...

Hyper 6 w/Panaflo 80L x 2 fans
Fan voltage
°C Idle
°C Load
°C Rise >ambient
°C/W re TDP
°C/W re MP
12 V
32
39
15
0.22
0.19
7 V
33
44
20
0.29
0.26
5 V
35
52
28
0.41
0.36

With one fan blowing in on one side and another fan blowing out on the other side, the pressure through the fins is increased for better cooling. The noise penalty is theoretically +3dBA. Subjectively, it is a small increase. Except at 5V, this configuration essentially matches the excellent cooling of the stock fan but at much reduced noise levels.

Is there enough room for a second fan?

The answer depends on the location and juxtiposition of the CPU HS retension bracket on the motherboard. If the heatsink retention bracket's long side is parallel to the I/O panel of the board, then there will not be enough room: The second fan will probably extend beyond the edge of the motherboard and jam up against the power supply. This is precisely the situation with my ASUS P4P800 mainboard; check the photos in previous pages.

If it is rotated 90° so that the short side of the HS retention bracket is parallel to the I/O panel of the mainboard, then there probably would be enough room for the second fan in most cases. This configuration of the mainboard is definitely preferable for the Hyper 6. See next text box for details.

COMPARISONS

First, here are the results for a Thermalright SP94, highly ranked in previous SPCR reviews.

Thermalright SP94 w/Panaflo 80L fan
Fan voltage
°C Idle
°C Load
°C Rise >ambient
°C/W re TDP
°C/W re MP
12 V
32
45
21
0.30
0.27
7 V
33
53
29
0.42
0.37
5 V
35
73
49
0.71
0.62

And now, a comparison between the Hyper 6 and the Thermalright SP94 both equipped with the Panaflo 80L.

Hyper 6 versus SP94 w/ Panaflo 80L
Fan Voltage
Heatsink
°C Idle
°C Load
°C Rise
°C/W re TDP
°C/W re MP
12V
Hyper 6
32
41
17
0.25
0.22
SP94
32
45
21
0.30
0.27
7V
Hyper 6
33
46
22
0.32
0.28
SP94
33
53
29
0.42
0.37
5V
Hyper 6
35
55
31
0.45
0.40
SP94
35
73
49
0.71
0.62

It's a downright massacre, isn't it? The cooling advantage of the Hyper 6 is 4°C at 12V, which is pretty big as heatsink performance goes. But it gets bigger as airflow is lowered: 7°C at 7V and a whopping 18°C at 5V.

In fairness to the SP94, previous experience and testing have shown that it does much better with a 92mm fan, for which the design appears to have been optimized. So, let's do another comparison, this time Hyper 6 + Panaflo 80L vs. SP94 + Panaflo 92L. The Panaflo 92L is rated for 43 CFM while the Panaflo 80L is rated for 24 CFM (at 12V); the manufacturer's noise ratings are 27 and 21 dBA/1m.

Hyper 6 + Panaflo 80L VS. SP94 + Panaflo 92L
Fan Voltage
Heatsink
°C Idle
°C Load
°C Rise
°C/W re TDP
°C/W re MP
12V
Hyper 6
32
41
17
0.25
0.22
SP94
30
41
17
0.25
0.22
7V
Hyper 6
33
46
22
0.32
0.28
SP94
31
46
22
0.32
0.28
5V
Hyper 6
35
55
31
0.45
0.40
SP94
33
55
31
0.45
0.40

Well, we have a tie in cooling performance. The Thermalright SP94 is able to match the performance of the Hyper 6, but with a >50% airflow advantage and higher noise. It's true that the noise difference at 7V and 5V is much smaller than the 6 dBA difference at 12V, but it is still there; the 80L is a quieter fan.



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