Arctic Cooling Duo: Alpine 7 & Freezer 7 Pro Attack Value
by Wesley Fink on January 29, 2008 2:00 AM EST- Posted in
- Cases/Cooling/PSUs
CPU Cooling Test Configuration
All tests use our new cooling test bed. This consists of a Rosewill R604-P-SL case sold by Newegg without a power supply. The Rosewill is typical of a moderately priced mid-tower case our readers might own. We chose this case because it is a Newegg top seller and includes a variable front intake louver and a quiet 120mm exhaust fan at the rear of the case. The case is also screw-less with components held in place by plastic holders instead of metal-to-metal connections. This appears to reduce case vibration and noise.
The power supply is a Corsair HX620W, which has proven in benchmarks to be an exceptionally quiet unit. The HX620W features a variable speed exhaust fan and a down-facing intake fan mounted just above the CPU space in the case. To eliminate the video card as a source of noise we have moved to a fanless card. Since we will move to Vista and DX10 in the very near future, the test bed runs an MSI NX8600 GTS that supports DX10 and cools with heatsinks and heatpipes. The reduced noise power supply and fanless video card have the potential to dramatically lower system noise in the test bed.
The motherboard is the ASUS P5K Deluxe. This P35 chipset motherboard has exhibited outstanding overclocking capabilities in our testing. It can also mount the newest 1333 FSB Intel Core processors and can handle our existing high-speed DDR2 memory. The P5K3 uses heatsinks and heatpipes to cool board components so all motherboard cooling is passive. There are no active cooling fans to generate unwanted noise during testing.
The 120mm exhaust fan mounted to the rear of the case is below the system noise floor. We run that fan during performance and overclocking tests. However, system noise can be cumulative, so we turn off the exhaust fan during noise testing.
| Cooling Performance Test Configuration | |
| Processor | Intel Core 2 Duo
X6800 (Dual-core 2.93GHz, 4MB Unified Cache) |
| RAM | 2x1GB Corsair Dominator PC2-8888 (DDR2-1111) |
| Hard Drive(s) | Hitachi 250GB SATA2 enabled (16MB Buffer) |
| Video Card | MSI NX8600GTS (fanless) - All Standard Tests |
| Intel TAT | Version 2.05.2006.0427 |
| CoreTemp | Version 0.95 |
| Video Drivers | NVIDIA 163.71 |
| CPU Cooling | Arctic Cooling Alpine 7 (with
PWM) Arctic Cooling Freezer Pro 7 ZEROtherm Nirvana NV 120 Cooler Master Hyper 212 OCZ Vendetta Scythe Kama Cross Swiftech H2O-120 Compact Corsair Nautilus 500 Thermalright Ultima-90 ZEROtherm BTF90 Xigmatek AIO (AIO-S800P) Evercool Silver Knight Enzotech Ultra-X 3RSystem iCEAGE Thermaltake Big Typhoon VX Thermaltake MaxOrb Scythe Andy Samurai Master Cooler Master Gemini II Noctua NH-U12F Asus Silent Square Pro Scythe Ninja Plus Rev. B OCZ Vindicator Thermalright Ultra 120 Extreme Thermalright Ultra 120 Scythe Infinity Zalman CNS9700 Zalman CNS9500 Cooler Master Hyper 6+ Vigor Monsoon II Lite Thermalright MST-9775 Scythe Katana Tuniq Tower 120 Intel Stock HSF for X6800 |
| Power Supply | Corsair HX620W |
| Motherboards | Asus P5K Deluxe (Intel P35) |
| Operating System | Windows XP Professional SP2 |
| BIOS | Asus AMI 0501 (06/26/2007) |
We run all cooling tests with the components mounted in the standard mid-tower case. The idle and stress temperature tests are run with the case closed and standing as it would in most home setups. Room temperature is measured before beginning the cooler tests and is maintained in the 20 to 22C (68F to 72F) range for all testing.
For consistency of test results, we use a standard premium silver-colored thermal compound. In our experience, the thermal compound used makes little to no difference in cooling test results. This is particularly true now that processors ship with a large manufacturer-installed heatspreader. Our current test procedure uses this standard high-quality silver-colored thermal paste for all cooler reviews.
For comparison, we first tested the stock Intel air-cooler at standard X6800 speeds and measured the CPU temperature at idle. We then stress the CPU by running continuous loops of the Far Cry River demo. We repeat the same tests at the highest stable overclock we could achieve with the stock cooler. "Stable" in this case is the ability to handle our Far Cry looping for at least 30 minutes without crashing.
The same benchmarks are then run on the review cooler(s) at stock speed, 3.33GHz (10x333) at stock voltage, highest stock cooler OC speed (3.73GHz), and the highest OC that could be achieved in the same setup with the cooler being tested. This allows measurement of the cooling efficiency of the test unit compared to stock and the improvement in overclocking capabilities, if any, from using the test cooler.
We compare cooling results with a representative sample of air and water-cooling results measured with CoreTemp. TAT provides a similar core measurement, but test results with CoreTemp are more consistent over a wide range of test conditions than the results reported by TAT. We retested previously reviewed coolers with CoreTemp under idle and load conditions. In benchmarks where the new test bed makes no apparent difference, like maximum overclock, we include results for all coolers tested since beginning cooling reviews in early 2007.
Noise Levels
In addition to cooling efficiency and overclocking abilities, users shopping for CPU cooling solutions may also be interested in the noise levels of the cooling devices they are considering. We measure noise levels with the case on its side using a C.E.M. DT-8850 Sound Level meter. This meter allows accurate sound level measurements from 35b dB to 130 dB with a resolution of 0.1 dB and an accuracy of 1.5 dB. This is sufficient for our needs in these tests, as measurement starts at the level of a relatively quiet room. Our own test room, with all computers and fans turned off, has a room noise level that has been reduced slightly to 35.0 dB(A) compared to the previous 36.4 dB(A). With the new test bed, the system noise at idle is 36.5 dB(A) at 24" and 37.8 dB(A) at 6". This is better than our previous system noise floor of 38.3 dB(A) at 24". The noise reduction at the 6" distance is dramatically lower than the previous test bed floor of 47 dB(A).
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Etern205 - Tuesday, January 29, 2008 - link
Sorry for the triple post.Somehow the link code does not work so...
http://www.intel.com/cd/channel/reseller/emea/eng/...">http://www.intel.com/cd/channel/reselle...essors/c...
strikeback03 - Wednesday, January 30, 2008 - link
Great, an LED fan direct from Intel.and it still uses push pins, though since it weighs about the same as the previous stock cooler I guess that is expected.
sparkuss - Tuesday, January 29, 2008 - link
Is there any reason you don't include with the new testbed/database your custom water cooling setup that you've been using to chart the X38/X48?I realize it may be extreme but it feels missing if only to show what that "next" level of cooling means in relation to the "top rated performers". I guess I'd also be remiss in not asking for at least one of the new Peltier/Water compact combo coolers in the mix just for those reference lines on the graphs.
If you only want to limit results to "available/ready to buy" I understand.
I'm still looking at all options for my next "technology-leap" (AMD 4000+ 939) system build and being able to see if investing in the extreme is worth the results would help with some of the choices.
Thanks
strikeback03 - Wednesday, January 30, 2008 - link
I'd guess Wesley is in a different part of the country/world than Raja or whoever has the extreme cooling setup.mindless1 - Tuesday, January 29, 2008 - link
Quote:"low noise, longer-life fan bearings and elastomeric fan mounts. This is expensive engineering."These aren't really longer-life bearings. Anyone can make a bearing and claim that in an ideal environment it will have really long life. That's shady marketing, the finished fan, as implemented, is not that ideal environment for several reasons such as thrust level, imbalance, ambient temp. Frankly I find the bearing on my Freezer 64 Pro to be below average compared to my major (fan manufacturer not PC parts relabeler) brands. I would rate them as well if not better than many of the crude fans one would find on cheap heatsinks at least, and the fan imbalance being offset by the rubber mounts does help.
As for the elastomeric fan mounts, no this is not expensive engineering. Maybe a penny a piece, no more expensive than screws to hold a fan on. Perhaps we could say the unique fan frame design cost a slight bit extra though when in volume the cost may be less than you'd think, particularly if not manufactured by a major label. Upon examination of the fan bearing anyone with a trained eye can easily see these are not premium sleeve bearings by any stretch, and they are a lot short on lubricant, you should expect them not to be so quiet within the life of the system. Relube the bearing periodically for best results.
While my comments seem (are) negative, overall these coolers are a great value, but we do need to be objective in recognizing the cons as well as the pros. I'm not aware of better value for the money so they are still 'sinks to seriously consider except for attempts at extreme overclocking.
Wesley Fink - Tuesday, January 29, 2008 - link
The Engineering is expensive - not necessarily the parts. What we were trying to say here is that these kinds of solutions are usually reserved for higher-priced coolers, and not often seen on coolers selling for such a low price.As for bearing life, most coolers in this price range don't even rate fan bearing life. The expected "life" of the fan on the under $15 Alpine 7 is 400,000 hours and the bearing is a Fluid Dynamic Bearing - like the Scythe Sflex 120mm fan which is $20 for the fan alone. These are both impressive specs for any cooler fan - especially one that sells with the complete cooler for less than $15.
mindless1 - Tuesday, January 29, 2008 - link
The life rating of 400K hours is nonsense.Their typical fan sells for $6, and that with a bit of profit built in. Their bearings are not special, just the marketing is.
http://www.newegg.com/Product/Product.aspx?Item=N8...">http://www.newegg.com/Product/Product.aspx?Item=N8...
A minimum price is a better proof than an inflated one, as even the generic junk out there selling for $2 is also marked up 250% or more through relabelers.
forgotmypassword - Tuesday, January 29, 2008 - link
Your under load test is WAY TOO GENTLE. Same AC Freezer 7 can hardly keep my E6550 @ 2.8GHz Core Duo under 75C under 100% load... Compare it to your 41CRamarC - Tuesday, January 29, 2008 - link
if your e6550 is hitting 75c you either don't have the freezer 7 mounted properly or your bios/fan control is configured to allow that level of heat.mindless1 - Tuesday, January 29, 2008 - link
You have no evidence of that. A higher ambient temp, worse case ventilation, and/or higher vcore can cause this.However, some mountings don't seem to put as much pressure on the 'sink, it can be mounted as "properly" as possible and still this (and especially along with a combination of aforementioned factors) could result in that temp.
The real question is WHY someone would have allowed their CPU to get this hot instead of reducing the o'c or taking whatever other measures are necessary.