3RSystem iCEAGE: A New Cooling Company Tackles the Heatpipe Tower
by Wesley Fink on June 21, 2007 12:02 AM EST- Posted in
- Cases/Cooling/PSUs
Noise
For many enthusiasts upgrading cooling the goal is maximum stable overclock, and they will live with the inconvenience of a louder system. For other users silence is the most important factor, and these users will forgo maximum overclocking if that increases system noise levels.
There are very few power supplies that do not have a fan. While Zalman and a few others do make expensive fanless power supplies, we have not seen a fanless unit larger than 500W, or one that would be used for seriously overclocking a system. With that in mind the noise level of the system with all fans turned off except the PSU was measured. The power supply used for the cooling test bed is the OCZ PowerStream 520, which is one of the quieter of the high performance power supplies.
We have also measured the Corsair 620W and Mushkin 650W power supplies which are reported to be quieter than the OCZ. Both the Corsair and Mushkin are indeed quieter at idle or start up speed. However as soon as load testing begins and the PSU fan speed kicks up the measured noise level is almost exactly the same as the OCZ PowerStream 520W.
We are currently in the process of reevaluating our cooler test bed and planning some updates. The new configuration will include a "quieter" power supply with variable speed and noise levels. We will also update to a P35 chipset motherboard with all passive cooling to the chipset. Changes to the test bed will appear as part of a future roundup with the motherboard, PSU, and CPU all upgraded to more current configurations. We are also investigating a change to a quad-core processor as a further challenge to CPU cooling.
The noise level of the power supply was 38.3 dB from 24" (61cm) and 47 dB from 6" (152mm). The measured noise level of the test room is 36.4 dB, which would be considered a relatively quiet room with a noise floor slightly below the OCZ PowerStream 520 PSU.
Noise levels were measured with the 3RSystem iCEAGE fan at both low 1000rpm and high 2200rpm speeds. Both low and high measurements were taken at both the 6" and 24" distances above the cooling fan on an open case side. Results were then compared to the other coolers/fans tested in this category. Measured noise levels in this chart should be considered worst case. Measurements were taken with an open side of a mid tower case 6" and 24" from the HSF. Real world would be a completely closed case with a further reduction in noise. Please look for both low and high speed results in the noise graphs.
The measured noise levels at 6" and 24" are all below the system noise floor at the low 1000rpm speeds. However noise goes up appreciably as the fan speed is increased to 2200rpm - at both distances. The iCEAGE actually specifies a 19dbA to 32dbA noise range for the included fan, but we do not know the test conditions used for measuring noise. Our noise measurements are higher, but our measurement procedure is more demanding than many noise measurement tests. This is another way of saying the specified noise results may be accurate if we had used the same measurement procedures used by 3RSystem.
The iCEAGE fan is definitely audible at high speed, but the noise is not particularly irritating in frequency. The noise audibly disappeared in a fully closed case, but it still will bother those very sensitive to system noise. If you are very sensitive to noise you should definitely run the iCEAGE in a closed case, and reduce the fan to a level about 25% or more down from the maximum speed.
For many enthusiasts upgrading cooling the goal is maximum stable overclock, and they will live with the inconvenience of a louder system. For other users silence is the most important factor, and these users will forgo maximum overclocking if that increases system noise levels.
There are very few power supplies that do not have a fan. While Zalman and a few others do make expensive fanless power supplies, we have not seen a fanless unit larger than 500W, or one that would be used for seriously overclocking a system. With that in mind the noise level of the system with all fans turned off except the PSU was measured. The power supply used for the cooling test bed is the OCZ PowerStream 520, which is one of the quieter of the high performance power supplies.
We have also measured the Corsair 620W and Mushkin 650W power supplies which are reported to be quieter than the OCZ. Both the Corsair and Mushkin are indeed quieter at idle or start up speed. However as soon as load testing begins and the PSU fan speed kicks up the measured noise level is almost exactly the same as the OCZ PowerStream 520W.
We are currently in the process of reevaluating our cooler test bed and planning some updates. The new configuration will include a "quieter" power supply with variable speed and noise levels. We will also update to a P35 chipset motherboard with all passive cooling to the chipset. Changes to the test bed will appear as part of a future roundup with the motherboard, PSU, and CPU all upgraded to more current configurations. We are also investigating a change to a quad-core processor as a further challenge to CPU cooling.
The noise level of the power supply was 38.3 dB from 24" (61cm) and 47 dB from 6" (152mm). The measured noise level of the test room is 36.4 dB, which would be considered a relatively quiet room with a noise floor slightly below the OCZ PowerStream 520 PSU.
Noise levels were measured with the 3RSystem iCEAGE fan at both low 1000rpm and high 2200rpm speeds. Both low and high measurements were taken at both the 6" and 24" distances above the cooling fan on an open case side. Results were then compared to the other coolers/fans tested in this category. Measured noise levels in this chart should be considered worst case. Measurements were taken with an open side of a mid tower case 6" and 24" from the HSF. Real world would be a completely closed case with a further reduction in noise. Please look for both low and high speed results in the noise graphs.
The measured noise levels at 6" and 24" are all below the system noise floor at the low 1000rpm speeds. However noise goes up appreciably as the fan speed is increased to 2200rpm - at both distances. The iCEAGE actually specifies a 19dbA to 32dbA noise range for the included fan, but we do not know the test conditions used for measuring noise. Our noise measurements are higher, but our measurement procedure is more demanding than many noise measurement tests. This is another way of saying the specified noise results may be accurate if we had used the same measurement procedures used by 3RSystem.
The iCEAGE fan is definitely audible at high speed, but the noise is not particularly irritating in frequency. The noise audibly disappeared in a fully closed case, but it still will bother those very sensitive to system noise. If you are very sensitive to noise you should definitely run the iCEAGE in a closed case, and reduce the fan to a level about 25% or more down from the maximum speed.
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STL - Friday, June 22, 2007 - link
A couple of suggestions:1. One of the most important things about any heatsink is its mounting system, but this article (like other AnandTech reviews) has no detailed photos of how the heatsink mounts to the motherboard.
"That's like the only thing that matters!", I scream in agony.
Such photos are somewhat difficult to take, but a few good macro shots can vastly improve a review.
2. Will AnandTech ever review the Enzotech Ultra-X? It's a down-blowing 120mm heatsink with four 8mm heatpipes (larger than the usual 6mm). It also has a bolt-through-board-to-backplate mounting system with spring thumbscrews, making four points of contact with the base - i.e. ABSOLUTE HEAVEN, at least on Socket 775. (These three criteria don't seem to be satisfied by *any* other modern heatsink. The old Swiftech MCX-4000 was bolt-through-board, spring screws, four points of contact with the base - although it had no backplate, thus exerting bending force on the board.)
I decided on the Ultra-X after reading horror stories about the Ultra 120 Extreme's tendency to not stay flush with the heatspreader, since it's held down by only one point of contact to the base.
It would be nice to see an AnandTech review that acknowledged the importance of the mounting system, and that the Ultra 120 Extreme isn't perfect.
strikeback03 - Friday, June 22, 2007 - link
Technically, a plane is defined by three points, so adding a 4th is next to impossible without one point being out-of-plane. So a 3 point mounting system would be the most flat.IIRC the Tuniq uses 4 thumbscrews with springs to bolt through the board to a backplate.
STL - Saturday, June 23, 2007 - link
No argument there - however, a spring-loaded mounting system ensures that minor variations in height between the mounting points don't make a difference.When the base is held down by only two (or worse, one) points of contact, the heatsink can *tip* off of the core, because we use towers and not desktops.
If you look at the Tuniq Tower 120, it indeed uses a bolt-through-board-to-backplate system with four spring thumbscrews, but what is bolted through the board is an H-shaped mounting plate that pins the heatsink down along a single line. The bar of the H looks too narrow to prevent the heavy heatsink from potentially tipping off of the CPU, although it might be wide enough.
StraightPipe - Thursday, June 21, 2007 - link
I've been looking for a quiet HSF to run in my living room, but these graphs can be hard to sort through.If you differentiated the low and high speeds by making them 2 different colors it would be much easier to read.
It's pretty darn easy to find a fan that will idle silently next to a +500W PSU, but It's a whole nother story to find one that runs on high quietly.
xsilver - Thursday, June 21, 2007 - link
silentpcreview rates the scythe ninja as the best "quiet" cooler available right now - AT's graphs dont show that because they have a lower ceiling on their graphs.Wesley Fink - Thursday, June 21, 2007 - link
Actually the Scythe Ninja is not the quietest cooler, as coolers are basically noise-free. The Scythe Ninja FAN is among the quietest we have tested, but it is just average in cooling ability. The Ninja performs better with more air flow than the stock fan can provide. The Noctua fan is one of the quietest we have tested, and any of the towers will be quiet indeed with a Noctua fan. Higher output but still quiet is the Scythe SFlex SFF21F. We are working on a 120mm fan roundup to select a stock fan to use in all cooler tests - in addition to stock fan tests.erikpurne - Thursday, June 21, 2007 - link
What? That's absurd. Maybe the serrated edges of the fins help with cooling in some obscure way having to do with turbulence or something, but they most definitely do not affect the surface area in any significant way.
Serrating the edges of the fins increases the amount of edge for a given surface area of fin. So yeah, technically, the surface area of the edges is increased. But the surface area of the edges of the fins is, at most, what... 0.01% of the total surface area of the cooling fins?
Retarded, but I guess when you have to come up with 8 pages of filler, some of it is going to be stupid.
Also, does anyone know how Anandtech compensates for ambient temperature? I'm starting to worry that they don't, since I haven't heard it mentioned, which would make their temperature readings worthless.
customcoms - Thursday, June 21, 2007 - link
"Room temperature is measured before beginning the cooler tests and is maintained in the 20 to 22C (68 to 72F) range for all testing."That is how the compensate for ambient...by keeping it the same for all tests. yeah, That is a four degree F range, 2 degree Celsius, but do you have a better system in your computer room?
Wesley Fink - Thursday, June 21, 2007 - link
We doubt those using the coolers we are testing have a heating/cooling system that maintains better than 2C in ambient temperature. This is very much in line with our philosophy of "real-world" component testing. We do agree comparisons of summer tests in Phoenix without air-conditioning to winter tests in Buffalo, NY in 4 feet of snow would not be a fair comparison, but we do monitor and maintain temperatures within reasonable limits as stated.Spanki - Friday, June 22, 2007 - link
D'oh! I always hav trouble with this "comment" software... please see http://forums.anandtech.com/messageview.aspx?catid...">this thread for my comments. Thanks.