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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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$38.70
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119 Comments

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This comment has been rated as unhelpful by Slickdeals users
Joined Apr 2015
L3: Novice
258 Posts
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#91
Quote from 7minutessober
:
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.
I want you to google "negative air pressure" and "positive air pressure" and then when you're done you can come back and apologize for your ignorance.
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Joined Jul 2008
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#92
Quote from hallaj33
:
I want you to google "negative air pressure" and "positive air pressure" and then when you're done you can come back and apologize for your ignorance.
Uh-huh, I want you to watch the videos of people blocking the airflow in their cases completely to no ill effects, then come back and apologize for yours. I got some links for you. Or, how about you set up a negative air pressure system and post your barometer readings.

Air out = air in. But you keep pretengineering.
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Joined Jul 2008
L6: Expert
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#93
Quote from s3rgioru3las
:
I'm not even going to bother with this nonsense. Efficiency is just not in your vocabulary.
So what you're saying is you can't show how the parts in your machine suffered any ill effects other than your imagination about temps due to airflow. Thought so.
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Joined Mar 2008
L2: Beginner
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#94
At this price its pretty tough to beat.
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Joined Jul 2008
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#95
Quote from hallaj33
:
Then why did switching cases fix the problem? The fans I have are fine, the case restricts airflow and prevents the fans from working optimally. On an open bench the fans work fine because they're not straining to work.
My guess is you don't know how to build.
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Joined Jan 2014
L2: Beginner
55 Posts
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#96
Quote from 7minutessober
:
Uh-huh, I want you to watch the videos of people blocking the airflow in their cases completely to no ill effects, then come back and apologize for yours. I got some links for you. Or, how about you set up a negative air pressure system and post your barometer readings.

Air out = air in. But you keep pretengineering.
As a test, I blocked the holes on this case to see if it would help temps. But it actually hurt temps. Funny how that worked... But go on.
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Joined Jul 2008
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1,754 Posts
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#97
Quote from LarryB6823
:
As a test, I blocked the holes on this case to see if it would help temps. But it actually hurt temps. Funny how that worked... But go on.
Uh uh. Still having trouble coming up with those parts that failed huh?


https://youtu.be/YDCMMf-_ASE


I mean you do realize it doesn't mean shit that your temps are a few degrees higher if they're within spec right? No obviously you don't.
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Last edited by 7minutessober September 12, 2020 at 12:03 PM.

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Joined Jan 2014
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#98
Quote from 7minutessober
:
Uh uh. Still having trouble coming up with those parts that failed huh?


https://youtu.be/YDCMMf-_ASE


I mean you do realize it doesn't mean shit that your temps are a few degrees higher if they're within spec right? No obviously you don't.
The moment you start arguing with an ignorant fool, you have already lost.
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Joined Oct 2007
Mess with my muny motions
1,077 Posts
77 Reputation
#99
Worrying about (and arguing about) air pressure stinks. Just buy a 120mm aio liquid setup and some good fans and call it a day

Even more impressive is if you can fit in a dual 240 but I don't believe it's always necessary
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Joined Jun 2014
L1: Learner
18 Posts
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#100
Good luck with CM MIR. Have had issues with them.
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Joined Jul 2008
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#101
Quote from LarryB6823
:
The moment you start arguing with an ignorant fool, you have already lost.
Still unable to back your concerns with data then? Pithy Confucius quotes don't make you any less incorrect about air pressure and temps.

I enjoy arguing with ignorant fools though, someone else might not get led astray by their ignorance.
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Joined Jul 2008
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#102
Lots of reviews saying the case layout is terrible.
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Joined Sep 2016
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Original Poster
Pro
#103
Has anyone been able to locate the UPC on the box? I received the box but can't find any UPC bar codes anywhere.
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Joined May 2013
L3: Novice
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#104
Quote from MrBlackFriday
:
Lots of reviews saying the case layout is terrible.
Layout is honestly just okay. Been building gaming rigs for 20+ years now, and as one of the cheaper cases I've built out of, I'd say it's about "average" for the price.

Mostly everything goes and fits exactly where you'd expect, with some hurdles for the case fans and PSU. I didn't have any glaring issues or notice anything extremely unusual - again- outside of the pointless PSU bracket and lack of tie-down anchor points. The default position of the front panel I/O can certainly interfere with longer video cards (granted a CPU tower cooler is in the way as well), but it's modular so you can just reposition the I/O panel. They also only preinstalled one of the motherboard stand-offs, but at least provide a very useful tool to install the other motherboard stand-offs. Other than that, hunting for 4 holes for each fan was an inconvenience, but the Q300L gets a point back for being flexible, at least (i.e. you can basically mount the fans anywhere you want once you find 4 holes that align).

Thermals were also fine in our tests. Buddy's Ryzen 3700X is idling at 40-50C and when hit with a synthetic load (OCCT) it topped out at 75C (attached HWinfo screencap). This was achieved with the stock Wraith Prism cooler and its pre-applied thermal paste. Didn't get a chance to do any thermal testing on his 5700XT (reference blower design) unfortunately. Overall, it's a good-looking serviceable case with a lot of cut corners.
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Last edited by spartanvi September 14, 2020 at 08:27 AM.

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This comment has been rated as unhelpful by Slickdeals users
Joined Jul 2008
L6: Expert
1,754 Posts
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#105
Quote from spartanvi
:
Layout is honestly just okay. Been building gaming rigs for 20+ years now, and as one of the cheaper cases I've built out of, I'd say it's about "average" for the price.

Mostly everything goes and fits exactly where you'd expect, with some hurdles for the case fans and PSU. I didn't have any glaring issues or notice anything extremely unusual - again- outside of the pointless PSU bracket and lack of tie-down anchor points. The default position of the front panel I/O can certainly interfere with longer video cards (granted a CPU tower cooler is in the way as well), but it's modular so you can just reposition the I/O panel. They also only preinstalled one of the motherboard stand-offs, but at least provide a very useful tool to install the other motherboard stand-offs. Other than that, hunting for 4 holes for each fan was an inconvenience, but the Q300L gets a point back for being flexible, at least (i.e. you can basically mount the fans anywhere you want once you find 4 holes that align).

Thermals were also fine in our tests. Buddy's Ryzen 3700X is idling at 40-50C and when hit with a synthetic load (OCCT) it topped out at 75C. This was achieved with the stock Wraith Prism cooler and its pre-applied thermal paste. Didn't get a chance to do any thermal testing on his 5700XT (reference blower design) unfortunately. Overall, it's a good-looking serviceable case with a lot of cut corners.
I can add that yeah, this case is cheap, but I have one of my machines in it running an i5 8400 and a 1660ti my kid uses for VR. Contrary to what all the Chicken Littles in this thread have complained about, there have been no inconveniences, let alone the catastrophic failures they allude to due to poor airflow.
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Last edited by 7minutessober September 15, 2020 at 08:33 AM.
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