Corsair Obsidian 550D: Starting to Specialize
by Dustin Sklavos on March 29, 2012 3:01 PM EST- Posted in
- Cases/Cooling/PSUs
- Corsair
- mid-tower
Testing Methodology
For testing Micro-ATX and full ATX cases, we use the following standardized testbed in stock and overclocked configurations to get a feel for how well the case handles heat and noise.
| ATX Test Configuration | |
| CPU |
Intel Core i7-2700K (95W TDP, tested at stock speed and overclocked to 4.3GHz @ 1.38V) |
| Motherboard | Gigabyte GA-Z68MX-UD2H-B3 |
| Graphics Card |
ASUS GeForce GTX 560 Ti DCII TOP (tested at stock speed and overclocked to 1GHz/overvolted to 1.13V) |
| Memory | 2x2GB Crucial Ballistix Smart Tracer DDR3-1600 |
| Drives |
Kingston SSDNow V+ 100 64GB SSD Samsung 5.25" BD-ROM/DVDRW Drive |
| Accessories | Corsair Link |
| CPU Cooler | Cooler Master Hyper 212 Evo with Cooler Master ThermalFusion 400 |
| Power Supply | SilverStone Strider Plus 750W 80 Plus Silver |
Each case is tested in a stock configuration and an overclocked configuration that generates substantially more heat (and thus may produce more noise). The system is powered on and left idle for fifteen minutes, the thermal and acoustic results recorded, and then stressed by running seven threads in Prime95 (in-place large FFTs) on the CPU and OC Scanner (maximum load) on the GPU. At the end of fiteen minutes, thermal and acoustic results are recorded. This is done for the stock settings and for the overclock, and if the enclosure has a fan controller, these tests are repeated for each setting. Ambient temperature is also measured after the fifteen idle minutes but before the stress test and used to calculate the final reported results.
Thank You!
Before moving on, we'd like to thank the following vendors for providing us with the hardware used in our testbed.
- Thank you to Puget Systems for providing us with the Intel Core i7-2700K.
- Thank you to Gigabyte for providing us with the GA-Z68MX-UD2H-B3 motherboard.
- Thank you to Crucial for providing us with the Ballistix Smart Tracer memory.
- Thank you to Corsair for providing us with the Corsair Link kit.
- Thank you to Cooler Master for providing us with the Hyper 212 Evo heatsink and fan unit.
- Thank you to Kingston for providing us with the SSDNow V+ 100 SSD.
- Thank you to CyberPower for providing us with the Samsung BD-ROM/DVD+/-RW drive.
- And thank you to SilverStone for providing us with the power supply.
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ExarKun333 - Friday, March 30, 2012 - link
This is very true. Also, buying a quality fan can make a HUGE difference on not just airflow but noise as well. All 80mm fans are not created equal, same with 120mm, and so forth.Folterknecht - Friday, March 30, 2012 - link
An other point is available space. Ok - if you just build that machine, use it and never touch it again fine, there small cases are ok maybe . But every time I tinker with my builds (midi/big towers) I m happy with my choices because my hands can reach the desired parts without problems. As a bonus you have better thermals with bigger cases, resulting in less noise if you choose the correct case and invest some thoughts into the right components and fans (their placement and direction of airflow).Rick83 - Friday, March 30, 2012 - link
I'm not completely bought by the argument of bigger volume = bigger cooling.Indeed, the bigger volume creates more "dead space", while a smaller case can have more airflow along the surfaces that actually need to be cooled, by more selective "ducting". While this allows for a longer, more gradual ramp-up of temperatures with open-air GPUs, and top-blower CPU-coolers, in the end the final in-case temperature is a direct function of the air passing out of the case (surface are radiation is so small, that I am going to ignore it). Component temperature is a function of cfd along the cooler, cooler surface, and delta-theta of the cooler surface and the air flowing past. I argue that a small case optimizes the first parameter, while the other parameters should be equal, after a burn-in period.
An exception would be a power profile that emits frequent short bursts of thermal energy - in this case a big enclosure has a larger buffer, before the in-case air temperature rises.
The advantage of a bigger volume case is, that you have more area for suction/exhaust with the environment, but you also have less airflow "effectiveness", unless you actually use the space.
Also, few people regularly tinker with their builds. And a well laid out small case may still be superior to a not so well designed large case.
ExarKun333 - Friday, March 30, 2012 - link
Bigger cases allow for bigger fans which = better cooling at lower noise levels.DMisner - Friday, March 30, 2012 - link
I hate when people, especially reviewers, use a Micro-ATX motherboard in an ATX case. Just a pet peeveShieTar - Friday, March 30, 2012 - link
I assume this decision was made in order to test both ATX and µATX cases with the same board, and as such it does make sense.On the other hand I do understand your point too. I did once buils a system into a (admitedly very cheap) case where the cable of the front-USB port was just a tad too short too reach the connectors at the very bottom of the full ATX board. That is a problem that you may not detect when testing with a µATX only.
Not that I expect this kind of problem from a modern Corsair case.
JCheng - Friday, March 30, 2012 - link
Dustin, thanks for this review. New testing methodology notwithstanding, your case reviews are the best I have ever seen, not only in terms of the depth of your coverage and very good writing, but also case selection that mostly matches the cases that I personally find interesting/appealing.I am thinking about buying the 550D today or tomorrow (NewEgg's $20 rebate expires tomorrow) for a new build that will have an OC'd 2600K or 3930X, along with a single low-to-midrange passively cooled GPU (I am going to use it as a Linux development workstation). The CPU will frequently be flogged with doing parallel compiles using as many threads as the CPU can handle concurrently. I would like the system to remain extremely quiet under these loads.
My question is whether you think the 550D's "underwhelming" thermal performance would be fixed by the addition of 2 slow 120mm fans, either behind the drive cages (practically empty--I only need 1 SSD for storage) or as intakes on the top panel. Or whether, since I'm not expecting to have the GPU generating much heat, it is even worth worrying about. I would prefer the CPU not reach 80 degrees under any circumstances.
Any thoughts would be appreciated... thanks!
Nje - Friday, March 30, 2012 - link
I'm also interested in this - although my plan was to add one or two intake fans on the side because of the conclusions drawn in 'The Big Air Cooling Investigation' at BitTech where they tested fan placements. They did use the R3, but I'm guessing the results would be pretty similar on the 550D. It seems that the most beneficial extra fans are the ones placed to blow air directly onto the motherboard.JCheng - Friday, March 30, 2012 - link
I didn't know about that BitTech article, thanks--really helpful information. I'd only worry whether there's enough clearance to put in a side fan if I go with a big tower cooler like Noctua NH-D14.Nje - Friday, March 30, 2012 - link
That's a good question, especially since I'm planning to get the Noctua NH-D14.. I'm still waiting for Ivy Bridge and some custom GTX680 cards to get into the stores though. Presumably at least one of the side fans would still have enough clearance?