Corsair Obsidian 900D Review: Making Room For High-End Gear

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Installing The Power Supply

Upright, And A Choice Of Left Or Right

There are two viable mounting locations for the power supply, so you can take your pick (unless of course you'd like to install two power supplies, which is also possible). In both cases, the PSU sits upright. This isn't particularly ideal for passively-cooled power supplies, but it shouldn't be a problem for units with fans.

The shot below shows that there's plenty of room, even for extra-deep power supplies. If your power source of choice is less than about 7.5" deep, you can mount a drive cage in front of it. Don't feel pressured to, though; this case already offers tons of interior space for storage.

The power supply sits on the bottom of the case, without any sound-proofing material. I don't think a thin rubber pad for isolation is too much to ask for in this price category.

I hooked up my microphone and concluded that relatively quiet power supplies probably won't present any vibration problems. But if you plan to mount an older PSU with a large or unbalanced fan, the lack of acoustic decoupling could result in additional noise.

Putting this minor concern aside, I wanted to address a more pressing question: does the upright position result in higher power supply temperatures? I measured Corsair's AX1200i sitting up and loosely positioned on its back, recording zero different between the two orientations.

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Summary
  1. Going Hands-On With Corsair's Massive Obsidian 900D
  2. Specifications And Features
  3. Outside Corsair's Obsidian 900D
  4. The Obsidian 900D's Stock Cooling System
  5. Replacing The Fans With Quieter Alternatives From Corsair
  6. Six-Channel Fan Control: Scythe Kaze Master Pro
  7. Installing The Power Supply
  8. Installing Hard Disks And SSDs
  9. Installing Optical Drives
  10. Motherboard Installation And Cable Management
  11. Audio Power: Our 48 W Scythe Kama Bay Amp Pro
  12. An Illuminating Case Mod
  13. Results: Temperatures And Acoustics
  14. Corsair's Obsidian 900D: Big, Bold, And Beautiful
About the author
Igor Wallossek

Igor Wallossek is a Senior Contributing Editor for Tom's Hardware DE. He tests and reviews CPUs, GPUs, games and headsets.

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38 comments
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  • slomo4sho
    Thanks for including the acoustics and temperature for a workhorse in addition to the gaming rig.
  • kitsunestarwind
    I am seriously waiting for this to be come available in Australia, I have the 800D , I love it, but I have no room left and I want/Need more liquid cooling Rad space without resorting to Case Mods, The Corsair 900D will do me perfectly and hopefully won't look so full
  • greenrider02
    Quite frankly, that is a beautiful case.
  • ASHISH65
    Good review! Corsair's Obsidian 900D looks so great!!
  • mapesdhs
    Igor, please at least include the option to show temps in C, not F. :D

    Ian.
  • slicedtoad
    ^yeah, I've never seen any computer related benchmarks done in Fahrenheit , lol.
    Very nice review though, Corsair makes some sweet cases, second only to the custom suppliers (mountain mods and the others) but much cheaper.
  • JJ1217
    kitsunestarwindI am seriously waiting for this to be come available in Australia, I have the 800D , I love it, but I have no room left and I want/Need more liquid cooling Rad space without resorting to Case Mods, The Corsair 900D will do me perfectly and hopefully won't look so full


    Be prepared to fork out an extra $120 because of the simple fact we're from Australia.
  • Vatharian
    I don't fully understand your review. Workstation-class rig is up to the challenge for exploring 900D abilities, but gaming rig? You slap off-the-shelf closed loop watercooler on the midrange CPU (TDP wise), one simple GPU and call it 'watercooled system'? What's the point? Get two or three water coolled GPUs in addition to CPU, set up one loop and them evaluate if the case is suitable for serious LC&OC, and if it's possible to arrange radiators such way to get rid of the heat and not kill usability. Point is: for such class of case you put low-end gaming rig. It doesn't tell us will it perform if serious system is inside. If the case performs with high-wattage rig, it will do for any smaller one, but not necessarily the other way around.
  • Idonno
    My 800D preforms great with a high end system and there is every indication the 900D is even better.
  • christop
    Good review!! I want one!!!
  • seller417
    very nice...i hope the price comes down a bit
  • TheBigTroll
    i hope people buying this case dont fit something like a MVG board
  • zankuto
    Great case. Did anyone else noticed the teddy bear in the window reflection in the picture in the "illuminated case mod" page lol
  • soundping
    With all those fans running it probably sounds like a break room full of coke machines.
  • ericjohn004
    I love minimalistic designs. Although I prefer the Fractal Design Define R4 w/Window, but that's why I own one. The Fractal case is a midtower though and if your looking for something as awesome as the R4, but in a full tower, I'd definitely recommend this case.
  • ericjohn004
    IdonnoMy 800D preforms great with a high end system and there is every indication the 900D is even better.


    They built two different systems in this rig. One to test the heat, and another one to try and replicate what a "normal" buyer would probably do with this case. Not many people go all high end, 6,000$ build. And even if they do, the Opteron build shows that it can handle any heat you throw at it. Because the Opteron build is a lot hotter than a water cooled build. So the with the Opteron build you learn a whole lot more about the cooling prowess of the case vs. 2 480mm radiators anyways.

    I see your point, but I think your asking for a bit too much. You wanted them to do a third build? Because to me, it's more important to show these two builds than a 5-6000$ build that most people aren't getting anyways. And to me, it's pretty obvious that you can fit this case with 2 480mm radiators and it would stay cool. So your not really learning anything by doing that.
  • ubercake
    Not only do I love this case... I am IN LOVE with this case.
  • sanilmahambre
    Now that's what i call the BIG , BOLD and BEAUTIFUL
  • JPForums
    I know I can just convert temperatures to C, but given how much more prevalent it is in the computer industry, can we have the temperatures given in C and then convert to F if we'd like. Better yet, include both. Thanks.
  • Hahaha, I almost had a heart attack when I saw the temps! Then I realized it was in Fahrenheit.

    Good review though.
  • grokem
    As much as I hate how all cases include too many external 5.25" bays, I applaud you for actually using them in this review. Almost every mid-tower ATX case or larger has 4 external bays that never get used. I could see an entire article about this topic.
  • cobra5000
    Funny, how these "high end" cases, still need fan upgrades?!
  • arkadi
    I have the 800 with h100 best case i had. This one look even better! To big for most ppl
  • FormatC
    117741 said:
    Igor, please at least include the option to show temps in C, not F. :D Ian.

    Here is the original with understandable temps:
    http://www.tomshardware.de/Corsair-Obsidian-900D,testberichte-241254-14.html

    I got this case really late and in the end I had only 3 days for testing, photos and write the whole review. I think, the workstation hardware is more realistic to stress big cases in the hard way. Water cooling is interesting but not the way to check out the cooling possibilities of a case.
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