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Cooler Master MasterBox Q300L Micro-ATX Tower w/ Magnetic Design Dust Filter EXPIRED

$38.70
$48.99
after $10 Rebate + Free S&H
+78 Deal Score
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Amazon.com has Cooler Master MasterBox Q300L Micro-ATX Tower w/ Magnetic Design Dust Filter for $48.66 - $10 Rebate = $38.66. Shipping is free. Thanks bitinabyte
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Edited September 12, 2020 at 11:09 AM by
A decent case for budget builds. Has a $10 rebate and there's an additional $0.30 discount.

Total: 48.99 - 10 - 0.30 + tax

https://smile.amazon.com/gp/produ...UTF8&psc=1 >Coupon is NLA. Price is now $38.66 AR.
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119 Comments

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Joined Jun 2007
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#76
does this thing actually have no provision for an ODD?
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Joined Jul 2008
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#77
Quote from JeffreyJ7022
:
I really like the look of this case but the airflow in it sucks.
What parts fail due to poor airflow in this case?
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Joined May 2013
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#78
Quote from muchwow
:
dust filters will reduce dust, not airflow. i'd recommend putting a dust filter on your rear intake (if you haven't already).

edit: adding a link that tests airflow vs dust (from the same guy that talked about airflow in your link). this test actually shows that using more exhaust fans keeps the dust out, which makes sense in terms of keeping your pc clean. but we want to balance airflow and keeping dust out. positive airflow does not mean less dust.

https://www.youtube.com/watch?v=d...usTechTips
Yes, we use the magnetic Silverstone 120mm fan filters. I suspect that adding dust filters to your intake fans would obstruct intake airflow, pressure, and obviously dust. Appears to be common knowledge that a physical barrier such as a filter would disrupt airflow, but probably not significantly enough to outweigh the benefits.

I think LTT's 1-year experiment was interesting, but I didn't link it because it's not reflective of real world configurations. They really needed to test positive vs negative bias in relatively balanced setups as data points as well. Basically, variations of their "in-betweenie" configuration with a negative pressure bias (and maybe static pressure data point too) would be more useful comparison/s vs their positive biased in-betweenie setup. I don't think we can conclusively say that a negative air pressure bias in an otherwise balanced fan setup (e.g. 3 exhaust + 2 intake) would reduce dust based upon their all "outtie" test alone.

I'd expect "in-betweenie" configurations where there's a positive air pressure bias would still outperform an "in-betweenie" configuration with a negative bias (granted all intake fans are filtered) in terms of thermals and dust concentration. Negative pressure configurations will force air into the case from not just the filtered intakes, but also the unfiltered ventilation/cracks (e.g. expansion slots and other unfiltered holes, gaps, vents, etc.) in the case. We even saw that in LTT's "outtie" configuration where the dust was relatively lean throughout the case, but highly concentrated on the fans (unhealthy for fan bearings) and huge dust bunnies were present inside the video card's cooler since it was sucking in unfiltered air directly next to the expansion bays.
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Last edited by spartanvi September 11, 2020 at 02:21 PM.
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Joined Nov 2013
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#79
Quote from spartanvi
:
Yes, we use the magnetic Silverstone 120mm fan filters. I suspect that adding dust filters to your intake fans would reduce intake airflow, pressure, and obviously dust. Appears to be common knowledge that a physical barrier such as a filter would disrupt airflow, but probably not significantly enough to outweigh the benefits.

I think LTT's 1-year experiment was interesting, but I didn't link it because it's not reflective of real world configurations. They really needed to test positive vs negative bias in relatively balanced setups as data points as well. Basically, variations of their "in-betweenie" configuration with a negative pressure bias (and maybe static pressure data point too) would be more useful comparison/s vs their positive biased in-betweenie setup. I don't think we can conclusively say that a negative air pressure bias in an otherwise balanced fan setup (e.g. 3 exhaust + 2 intake) would reduce dust based upon their all "outtie" test alone.

I'd expect "in-betweenie" configurations where there's a positive air pressure bias would still outperform an "in-betweenie" configuration with a negative bias (granted all intake fans are filtered) in terms of thermals and dust concentration. Negative pressure configurations will force air into the case from not just the filtered intakes, but also the unfiltered ventilation/cracks it (e.g. expansion slots and other unfiltered holes, gaps, vents, etc.) in the case. We even saw that in LTT's "outtie" configuration where the dust was relatively lean throughout the case, but highly concentrated on the fans (unhealthy for fan bearings) and huge dust bunnies were present inside the video card's cooler since it was sucking in unfiltered air directly next to the expansion bays.
valid points, but subtle changes in positive vs negative won't affect it as much as having a filtered intake (my original point). positive airflow is preferred for cooling purposes - simply put, so that the exhaust fans are not wasting energy on moving nonexistant airflow - but to say that it makes a meaningful difference on dust buildup (especially when we're counting one to two fan differences on intake vs exhaust) wouldn't be entirely accurate.
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#80
Ah gotcha, fair points too.
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Joined Jul 2003
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#81
I've bought of these and have them running with an old full size Nvidia card and everything fits great. I know feels a little flimsy but the cable management and mounting locations work perfectly for my mATX setup. I did add 3 more fans to give it more air flow. I'm not too sure why some are saying it's loud, I've added 3 fans on top of what included in both builds and it doesn't sound out of the ordinary. Maybe something is loose inside or a cable is touching a fan? I'm having no problems with this case except with the dust filters sliding if I bump it. Overall for the price it's a really nice case.
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Joined Oct 2010
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#82
I love this case! The only criticism I have is the lack of a PSU cover. Those covers help the builder produce a super clean looking build by hiding the wires.
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Joined Jun 2011
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#83
the magnetic filter concept here is pretty cool. I kinda wish i needed a case Smilie
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Joined Sep 2013
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#84
Used this case for my 1st pc build and it was the absolute worst case in terms of thermal performance. The holes are too small to meaningfully push air out and with the filter it becomes almost negligible. Don't take my word for it either, Gamer's Nexus did an excellent review that highlights this problem. I wouldn't purchase this case at all at any price. Thermals will be horrendous and you'll lose value in the performance loss. Here's a link to Steve's review on YT https://www.youtube.com/watch?v=F3n80GxU-Zs
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Joined Sep 2013
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#85
Quote from s3rgioru3las
:
Used this case for my 1st pc build and it was the absolute worst case in terms of thermal performance. The holes are too small to meaningfully push air out and with the filter it becomes almost negligible. Don't take my word for it either, Gamer's Nexus did an excellent review that highlights this problem. I wouldn't purchase this case at all at any price. Thermals will be horrendous and you'll lose value in the performance loss. Here's a link to Steve's review on YT https://www.youtube.com/watch?v=F3n80GxU-Zs
edit: link is for Q500L but it's the exact same hole size. And the link has already been posted but it's good to highlight it again since it gets lost in the comments
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#86
Quote from s3rgioru3las
:
edit: link is for Q500L but it's the exact same hole size. And the link has already been posted but it's good to highlight it again since it gets lost in the comments
You people do understand that air out = air in right? You people complaining about airflow in every farking case thread are as bad as people selling essential oils.
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Last edited by 7minutessober September 11, 2020 at 05:51 PM.
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Joined Sep 2013
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#87
Quote from 7minutessober
:
You people do understand that air out = air in right? You people complaining about airflow in every farking case thread are as bad as people selling essential oils.
What are you even talking about? By your own logic, the hole size being too small for meaningful airflow means intake is bad. Which is where the problem comes from? Which is what I'm talking about anyway??? I'm trying really hard to understand you, but you don't make any sense. This case's holes are too small for meaningful airflow and as a result, thermals are some of the worst out there. You keep saying "you people" but this is the only case I've ever left a comment for on SD because I bought this very case and had terrible thermals.
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#88
My anecdotal evidence is that the case is bad for keeping your GPU temps in check. I suspect it's due to too many holes causing the air to stagnate instead of flowing in a focused stream in and out. Like I said earlier, put the same parts in another case and my temps went down almost 20C.
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Joined Jul 2008
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#89
Quote from s3rgioru3las
:
What are you even talking about? By your own logic, the hole size being too small for meaningful airflow means intake is bad. Which is where the problem comes from? Which is what I'm talking about anyway??? I'm trying really hard to understand you, but you don't make any sense. This case's holes are too small for meaningful airflow and as a result, thermals are some of the worst out there. You keep saying "you people" but this is the only case I've ever left a comment for on SD because I bought this very case and had terrible thermals.
Every pc thread has the same circus of geniuses saying "b-b-b-b-but muh airflow!!!"

How bad were your thermals, what components were running outside of their specs?

If you're exhausting air outside the case, fresh air is pulled in at the same rate, regardless of the size of input holes. You aren't creating a vacuum inside the case. Unless you're overclocking your components past their manufacturer specs, virtually any case will be fine.

Hell we used to pull fresh air from behind drive panel blanks and it was just fine.
Literally any case with an intake and exhaust fan, or even a couple exhaust fans will be fine. But every case deal on this site has 400 pretengineers jumping in with how their machines literally melted into a puddle on the floor because they didn't have a 2ft square wind tunnel under their desk.
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Joined Sep 2013
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#90
Quote from 7minutessober
:
If you're exhausting air outside the case, fresh air is pulled in at the same rate, regardless of the size of input holes. You aren't creating a vacuum inside the case.
Literally any case with an intake and exhaust fan, or even a couple exhaust fans will be fine.
I'm not even going to bother with this nonsense. Efficiency is just not in your vocabulary.
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