COOLER MASTER R4-BM8S-30PK-R0 Blade Master 80mm Case Fan

Pros: The fan does move a lot of air, even at half speed.

Cons: It is noisy at 100% speed, but that is to be expected with this fan. I found that with my system, keeping it at about 60% speed will get me the best air flow before the noise becomes an annoyance. I imagine that better mounting hardware and more solid case would reduce some of the noise.

Other Thoughts: This fan is perfectly adequate for my system.

Pros: They move a lot of air, for their size. Variable speed. No LED. (I hate lights.)

Cons: Power cables are surprisingly short. If you put these into a Cooler Master HAF XB, you're almost guaranteed needing to buy 4pin extensions. Unless you connect them via molex adapter (which they don't come with). If you do that, see next con. Minus an egg.

Loud at high speed. This is to be expected, especially for an 80 mm fan. The details page says 28 dba at 3,000 rpm. That is absolute bunk. I'd say more like mid to high 30's dba. However, I'm not going to take an egg for their noise level.

A few of the frame screw holes split a small amount while I was mounting them. Minus an egg.

Other Thoughts: These are simply too loud at full speed. I'm going to have to buy some extensions and connect them to my motherboard and limit their speed to somewhere around 1,000 - 1,400 rpm. That will obviously reduce the amount of air they move. Adding filters will reduce it even further but that's a trade off I'm willing to make.

Pros: -PWM.
-Good air flow.

Cons: -Does get loud at max RPM.
-Not as cheap as I feel it should be.

Other Thoughts: "Long life sleeve"... Long life compared to what? A Mayfly?

I bought 2 of these for a small server and a year later they're already rattling around.

Obviously YMMV based on your usage. I've been running them near continuously for the past year so that may factor heavily but I didn't expect them to fail this soon. CoolerMaster generally makes quality product so it's a bit disappointing...

I have 4 CoolerMaster ball bearing 80mms that I use as a heat exhaust system for a cabinet that have run nearly non-stop for the better part of the last 6 years and they run as silent and smooth as the day I installed them... Heck they are so old that the CM stickers have fallen off the hubs! Granted they are much lower RPM/CFM but it speaks to the general quality of CM's fans.

Pros: Inexpensive ($10 with free shipping w/ Iron Egg Guarantee), includes foam pads for fan mounts, fairly good air flow, 4-pin PWM connector.

Cons: Sightly louder for my taste, even with the PWM control. Also, I expected slightly higher quality from Cooler Master, but hey.

Other Thoughts: Overall, good fan. I liked the 4 pin, though make sure your motherboard supports 4 pin connection. Depending on your tolerance for sound, it might be loud, but for me, my 90mm fan drowns out the 80mm when both are on.

Pros: Installed as case fans, they'll move a good amount of air if installed properly.

Quiet! Installed, turned on and didn't even think they were running. Then I set my BIOS to disable fan control to run them at full speed.. noticeable, but didn't seem loud at all. The fan on my GPU under load is louder.

Cons: Cable could maybe be slightly longer for larger cases with smaller boards, but I didn't have a problem with mine as it's a full-size ATX case and motherboard.

Seems as though the PWM speed control minimum is about 800 RPM. My BIOS supports turning down the fans completely under no load. That is set, but they still run at 800 RPM. Definitely not a deal breaker though, can't even hear them at this level.

Other Thoughts: Ordered two, got them both installed in under ten minutes.

Pay attention before you buy, these are 4-pin with PWM control for motherboard fan headers.

Pros: Nice cheap fan
not to loud

Cons: none

Pros: Is decent while it works.

Cons: Very loud whining after a few months. Not recommended.

Other Thoughts: Case fan works well when new. Now, at 6+ months, it will sometimes whine like a banshee. At first I thought it was my furnace, but turned out to be this fan.

I'm with you Greg Parent; I remember when the CoolerMaster name meant something. Now it just seems to be shoddy merchandise in nice packaging.

Manufacturer Response:

Hi RacerX,

We are sorry to hear that you are having trouble with the Case Fan. Please fill out the parts request, link below, so we can see if we can send you a replacement. If you have any other questions, please contact us on live chat for further assistance.

Respectfully,
CMSUA Customer Support

External Link(s):

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Request Parts|

Pros: Moves air and is quiet, just like a fan should. The rubber mounting pads were a nice touch.

Cons: None

Other Thoughts: At level 4 fan setting it's quiet
At 5 it's noticable
At 7 it starts to be loud.

Pros: Were quiet as advertised for 45 days.

Cons: After 45 days, I actually had to unplug one of the fans because it sounded like a weedwacker was in my case. No kidding, my wife came downstairs to ask what the noise was! Fortunately the other one I put in is only one third as loud so it still gets to run until I can find better fans.

Other Thoughts: Oh, and the other two fans (I bought four at once based on the name brand) will never see the inside of a case. I remember when the CoolerMaster name meant something. Guess I'll go shopping for Zalman instead.

Manufacturer Response:

Hi Greg Parent, we are sorry to hear that you are having trouble with our case fans. Please make sure to keep the fans clean of dust. Dust can cause many issues including rattling. Moreover, the fans in question have warranty. Please contact us via the Live Chat link below so we can get the fans replaced. Respectfully - CMUSA Customer Support.

External Link(s):

Live Chat|

Pros: Fit where I needed it to, an old U**** heat sink that the fan died on.

Cons: none

Other Thoughts: sleep!