Corsair Obsidian 650D: Transmuting Graphite to Obsidian
by Dustin Sklavos on July 29, 2011 1:05 AM EST- Posted in
- Cases/Cooling/PSUs
- Corsair
- mid-tower
Noise and Thermal Testing, Stock
Honestly I'm reasonably certain the Corsair Obsidian 650D's performance is going to be comparable to that of the Graphite 600T; internally the designs are almost identical. What makes the 650D nice is now we have a more usable performance reference point than we did with the 600T, which was tested before our methodology was firmed up.
The 650D includes a fan controller just like the 600T and you'll find like I did that the fan controller is good for reducing noise from the fans...and that's about it. Instead of the knob on the 600T the 650D's controller just has three settings, but as you'll see it's better to just set it to low and forget it. For all the other cases with adjustable fan speeds, I used the results from testing that best balanced acoustics and performance.
As you can see there's really no benefit to running the fans at any setting but the lowest, but my skepticism of the 650D's negative air pressure design from long term experience with the 600T begins to bear itself out, with thermal performance largely in the middle of the pack. SilverStone's RV03 in particular is able to produce notably better CPU and GPU temperatures while being almost $50 cheaper, and In-Win's $99 value juggernaut, the BUC, continues to run wild.
Under the circumstances, though, the 650D's design does pay off somewhat, as the noise levels are on par with if not better than most of the other cases. Idle noise levels aren't great, but load noise is near the top of the charts. The real test is going to be how it handles the increased thermal load of our overclocked settings.
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The Sorcerer - Friday, July 29, 2011 - link
NZXT Gamma and now Shinobi. Both brilliantly made cases for that price. Get a good set of fans and that's all one needs for a mid-end gaming rig.Just a question, wouldn't filling up the HDD bays and doing the required cable work (SATA Power connectors and SATA cables) give more clear idea about how good the cable management should be? MATX layout boards are bundled with shorter SATA cables, whereas a full-fledged atx motherboards (Like...890GPA UD3H) comes with bit longer cables.
Its been a very long time since I got my hands on those prebuilt systems with "slim" unit linueups, but back in the days negative pressure enclosures were nicely made and well thought construction to hold the adds-ons nicely.
Dustin Sklavos - Friday, July 29, 2011 - link
I can actually comfortably say cable management in the 650D will still be stellar even if you load the whole thing up. Why? Because internally it's nigh identical to the 600T and I did exactly that with my primary machine.randinspace - Friday, July 29, 2011 - link
Why doesn't Corsair just produce a model that comes with one of their popular (?) water cooling units?AlexKitch - Friday, July 29, 2011 - link
I'm a big fan of this case but had such problems getting my hard drives into the hard disk bays. I felt like I was about the snap them every time.Also, make sure you get the update to this case which upgrades the fan controller and mounts the front intake fan on rubber standoffs rather than the original screws - this solves a lot of noise/resonance problems.
darckhart - Friday, July 29, 2011 - link
what's the model number for the "update?"AlexKitch - Friday, July 29, 2011 - link
Corsair's website has it listed as product SKU# CC650D-FANKIT . When I bought the case, it had already been included in the box (but not fitted)Locklear - Friday, July 29, 2011 - link
The front fan is a real offender in noise. Something to do with the pitch of the fan-blades in combination with the front mesh. Just built a new comp with this case, and switching the 200mm fans with Cooler Master Megaflows worked wonders on noise. The annoying "whirling" disappeared completely. The fan change will come at a slight price though. You have to sacrifice one drive cage and move the other to the middle position in the cabinet due to the added 10mm depth on the megaflows (200x30mm). Using other 200x20mm fans should also work fine.rbg08 - Saturday, July 30, 2011 - link
Good to about this fix. I own this case and just yesterday ordered a Xigmatek XLF-F2004 White LED Black Case Fan (200x20mm) on sale from Newegg to match the fan on my Dark Knight-S1283W CPU heatsink. I was debating whether to install it in front or on top. Sounds like I may decrease noise as well by mounting it in front.malignate - Wednesday, August 3, 2011 - link
This is my biggest complaint about this case since I've set it up! If you do a search on youtube for 650d and noise, there is a video demonstrating this problem. I went back and forth with Corsair on a solution and the best they could come up with was to send me another fan. As mentioned, it has to do with the combination of the fan and the front mesh.I tried replacing the front fan with the XIGMATEK CLF-F2004 White LED fan, which is also 20mm so it still fits without drive cage modification. This took some adjustment because the fan screw mounts on the fan are facing for an exhaust fan, not an intake fan. I ended up using wire ties and attaching it to the front mesh. Not pretty but it still works. Unfortunately, this fan has the same problem with this case but is slightly muted. I think I'm going to have to go the Cooler Master Megaflow route and move the hard drive cage as has been recommended by others. This is a ridiculous design flaw for a case that costs this much and seems otherwise well thought out. Corsair needs to fix this.
flong777 - Tuesday, August 23, 2011 - link
I own the 650D and the case is not noisy - nor does the Anandtech review reflect excessive noise. I don't think that I have the updated fan kit either. No case that moves air is going to be entirely silent. Read the reviews on the Fortress FT02.People should not be misled into thinking that this case is noisy. I mean if you are really sensitive about noise, turn the fans to low and you will have trouble hearing the system at all.
With the fans on low I hear my CPU cooler but not the case - I have the Noctua NH-D14 cooler.