BE QUIET! BK008 Pure Rock Slim Heatsink & Fan (Intel & AMD Sockets) £19.99 at Amazon (+£4.49 Non Prime)
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BE QUIET! BK008 Pure Rock Slim Heatsink & Fan (Intel & AMD Sockets) £19.99 at Amazon (+£4.49 Non Prime)

£19.99£229%Amazon Deals
26
Posted 12th Oct
Good value and quality, low noise fan for intel/amd builds.
Pure Rock Slim’s design is compatible with all current Intel® and AMD™ sockets and fits particularly well in PC cases with limited space thanks to the asymmetrical and compact construction. If you are seeking the best possible mix of performance and price in the Essential CPU cooler segment, your search is over. Pure Rock Slim simply has to be your choice.

Excellent Cooling Efficiency
- High cooling capacity for this category, at 120W TDP
- Three 6mm heat pipes with aluminum caps carry heat to cooling fins for high performance

Convenient, Highly Compatible Compact Design
- Compact design saves space, making cooler compatible with a vast array of equipment and possible installation configurations
- Full configuration of RAM memory banks in PC cases with limited space
- Compatibility with Intel® and AMD™ sockets

Low-Noise Operation
- Seven blade silence-optimized 92mm be quiet! PWM fan with high-quality sleeve bearing is optimized for quietness and supports the best balance of cooling performance and silent operation
- Fan blades are airflow-optimized to reduce noise-generating turbulence
- Even at 100% PWM function, noise is a scant 25.4dB(A)
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26 Comments
not good reviews on installation .
ws00712/10/2019 13:16

not good reviews on installation .


Bad review, one, mostly positive
guru3d.com/art…tml


"Final Words
The Pure Rock Slim cooler is intended for compact and simple interwebbz PCs and, with its low profile, a suitable alternative to use in a HTPC. Cooling performance is average when compared to full size models, but that is as expected. The Core i7 4790K we used remains within acceptable temperature levels as long as we do not overclock it. The trade-off with the small form factor and relative average performance is an incredibly low noise level, you'll be hard pressed to be able to even hear noise coming from this puppy. The product ticks the right boxes as that as being compact and silent is the sole purpose of this product. In the end we can surely recommend the Pure Rock Slim, if you stick to the intended purpose of this product though, mainstream cooling with nice low noise levels."

good if your after silent and are not overclocking, i won't bother if you have a ryzen rig.
I might get this for one of the gaming PCs. It has a basic Antec cooler which looks good but is far too loud under idle load and can’t even be speed controlled...
plewis0012/10/2019 13:38

I might get this for one of the gaming PCs. It has a basic Antec cooler …I might get this for one of the gaming PCs. It has a basic Antec cooler which looks good but is far too loud under idle load and can’t even be speed controlled...


I'm sure the motherboard will be doing the speed controlling and not the fan. If it's 4 pin then the MB will send the correct PWM signal via the 4th pin. With the 3rd pin doing speed measurements.
Tried different makes of these and hate them, when building a PC, these are the worst things to install
polarbaba12/10/2019 14:07

I'm sure the motherboard will be doing the speed controlling and not the …I'm sure the motherboard will be doing the speed controlling and not the fan. If it's 4 pin then the MB will send the correct PWM signal via the 4th pin. With the 3rd pin doing speed measurements.


It doesn’t. I know how to attach a fan to the motherboard... if you use Asus AI Suite to test it, it’ll report back the fan can’t be controlled, only the chassis fan. In the BIOS setting it to silent, turbo, normal or even off - nothing changes. The Antec is a 3-pin but they can usually be controlled.
Edited by: "plewis00" 12th Oct
plewis0012/10/2019 14:14

It doesn’t. I know how to attach a fan to the motherboard... if you use A …It doesn’t. I know how to attach a fan to the motherboard... if you use Asus AI Suite to test it, it’ll report back the fan can’t be controlled, only the chassis fan. In the BIOS setting it to silent, turbo, normal or even off - nothing changes. The Antec is a 3-pin but they can usually be controlled.


I thought Asus AI suite is quite smart.

It lets me control via pwm or DC control, which means it doesn't care for pwm signals.


Maybe forcing it to manual will help.

Although I never use the windows software, I always use the BIOS version.


I have a 3 pin CPU fan in my Asus MB . Which works fine.
Also controls my CPU water-cooling pump ( 3 pin ) using CPU temp as it's control.
Edited by: "polarbaba" 12th Oct
polarbaba12/10/2019 14:19

I thought Asus AI suite is quite smart.It lets me control via pwm or DC …I thought Asus AI suite is quite smart.It lets me control via pwm or DC control, which means it doesn't care for pwm signals. Maybe forcing it to manual will help.Although I never use the windows software, I always use the BIOS version.I have a 3 pin CPU fan in my Asus MB . Which works fine.Also controls my CPU water-cooling pump ( 3 pin ) using CPU temp as it's control.


If you let it self-calibrate it says it can’t control it. It’s an H81M-K board with an i5-4590S, I just used older and spare parts on the cheap in a Corsair mATX case but it’s surprisingly capable as a PC, just louder than I want at idle. It’ll run the games I play at decent frame rates too. I put it in the loft extension as it’s out of the way of the missus then but late at night, the CPU fan is the loudest part. I didn’t realise as it was in the office before and with all the equipment I never heard it.

The options are either replace it entirely or use one of those speed limiter cables - as it’s an S CPU it doesn’t get hot anyway.
Edited by: "plewis00" 12th Oct
plewis0012/10/2019 14:26

If you let it self-calibrate it says it can’t control it. It’s an H81M-K bo …If you let it self-calibrate it says it can’t control it. It’s an H81M-K board with an i5-4590S, I just used older and spare parts on the cheap in a Corsair mATX case but it’s surprisingly capable as a PC, just louder than I want at idle. It’ll run the games I play at decent frame rates too. I put it in the loft extension as it’s out of the way of the missus then but late at night, the CPU fan is the loudest part. I didn’t realise as it was in the office before and with all the equipment I never heard it.The options are either replace it entirely or use one of those speed limiter cables - as it’s an S CPU it doesn’t get hot anyway.


Can you play with the fan curve?. That helps.
polarbaba12/10/2019 14:30

Can you play with the fan curve?. That helps.


That’s what the calibration does, the speed is constant no matter what.
plewis0012/10/2019 14:55

That’s what the calibration does, the speed is constant no matter what.


Sounds like like you tried most things already. Last resort is a fan controller gadget.
This has been the price for ages and better buy a Deepcool Gammaxx 400 which i far better performance wise compared to this.
polarbaba12/10/2019 14:57

Sounds like like you tried most things already. Last resort is a fan …Sounds like like you tried most things already. Last resort is a fan controller gadget.


Or replace the fan with this BeQuiet. In games it’s not as bad the GPU fans start anyway. I am going to try a speed-limiter cable first, the case doesn’t have bays for a fan controller either.
plewis0012/10/2019 14:26

If you let it self-calibrate it says it can’t control it. It’s an H81M-K bo …If you let it self-calibrate it says it can’t control it. It’s an H81M-K board with an i5-4590S, I just used older and spare parts on the cheap in a Corsair mATX case but it’s surprisingly capable as a PC, just louder than I want at idle. It’ll run the games I play at decent frame rates too. I put it in the loft extension as it’s out of the way of the missus then but late at night, the CPU fan is the loudest part. I didn’t realise as it was in the office before and with all the equipment I never heard it.The options are either replace it entirely or use one of those speed limiter cables - as it’s an S CPU it doesn’t get hot anyway.


Or just replace the fan for a 4pin one?
ws00712/10/2019 15:19

Or just replace the fan for a 4pin one?


The way it's mounted, you can't.

It's this cooler:
amazon.co.uk/gp/…c=1

Like I said, cheap and cheerful. But they are lying when they say 20dBa because it just isn't...
Edited by: "plewis00" 12th Oct
plewis0012/10/2019 15:19

The way it's mounted, you can't.It's this …The way it's mounted, you can't.It's this cooler:https://www.amazon.co.uk/gp/product/B01HLAHDWE/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1Like I said, cheap and cheerful. But they are lying when they say 20dBa because it just isn't...


ARCTIC F9 PWM PST - 92 mm PWM PST Case Fan | Silent Cooler with Standard Case | PST-Port (PWM Sharing Technology) | Regulates RPM in sync amazon.co.uk/dp/…Y32

That's what cable ties are for.

FOR Cable Tie Black 2.5 x 100mm Box 100 FORCT100B amazon.co.uk/dp/…EKE
ws00712/10/2019 15:35

ARCTIC F9 PWM PST - 92 mm PWM PST Case Fan | Silent Cooler with Standard …ARCTIC F9 PWM PST - 92 mm PWM PST Case Fan | Silent Cooler with Standard Case | PST-Port (PWM Sharing Technology) | Regulates RPM in sync https://www.amazon.co.uk/dp/B002QVLBPO/ref=cm_sw_r_cp_apa_i_UoEODb0WGBY32That's what cable ties are for. FOR Cable Tie Black 2.5 x 100mm Box 100 FORCT100B https://www.amazon.co.uk/dp/B009HN1NJS/ref=cm_sw_r_cp_apa_i_TrEODbE7DJEKE


If I'm going to meddle around with it, use some ghetto mod and take the computer apart I might as well replace the entire cooler. I can't be doing with cable tying the fan on, mostly because if it's not quite right it'll buzz and vibrate anyway.
plewis0012/10/2019 15:43

If I'm going to meddle around with it, use some ghetto mod and take the …If I'm going to meddle around with it, use some ghetto mod and take the computer apart I might as well replace the entire cooler. I can't be doing with cable tying the fan on, mostly because if it's not quite right it'll buzz and vibrate anyway.


Sounds like you should spend a lot more on computer components if you just want them to work, and avoid the cheap and nasty stuff :/
ws00712/10/2019 15:49

Sounds like you should spend a lot more on computer components if you just …Sounds like you should spend a lot more on computer components if you just want them to work, and avoid the cheap and nasty stuff :/


Yeah that or I shouldn't listen to randoms on a forum. Since you came late, I'll just tell you what I said above, it's a spare computer build out of leftover parts. The Antec cooler cost less than £10 worked fine when I bought it, still works fine now and the entire machine runs AAA games acceptably - it's merely noisier than it needs to be.
plewis0012/10/2019 15:51

Yeah that or I shouldn't listen to randoms on a forum. Since you came …Yeah that or I shouldn't listen to randoms on a forum. Since you came late, I'll just tell you what I said above, it's a spare computer build out of leftover parts. The Antec cooler cost less than £10 worked fine when I bought it, still works fine now and the entire machine runs AAA games acceptably - it's merely noisier than it needs to be.


I had read your previous comments, and as it was built from left over parts, I assumed you built it and didn't mind getting your hands shredded, that's why I suggested changing just the fan and not the whole cooler. The thing about advice is you can take it or leave it.
ws00712/10/2019 16:06

I had read your previous comments, and as it was built from left over …I had read your previous comments, and as it was built from left over parts, I assumed you built it and didn't mind getting your hands shredded, that's why I suggested changing just the fan and not the whole cooler. The thing about advice is you can take it or leave it.


I’m weighing up changing the cooler or a cheap fix like a speed limiter. I don’t want to hack this one to bits. If it gets changed out it can go to use in another machine.
With these tower style heatsinks, if your mobo supports it you can always jerry rig another fan on the other side (zip ties or some clips) volt control and the blocks tend to perform better
plewis0012/10/2019 15:19

The way it's mounted, you can't.It's this …The way it's mounted, you can't.It's this cooler:https://www.amazon.co.uk/gp/product/B01HLAHDWE/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1Like I said, cheap and cheerful. But they are lying when they say 20dBa because it just isn't...


You're right, it is definitely not 20 dBa.

Looking at Frosty's big list...

frostytech.com/art…e=5

A few of the other Be Quiet products were tested, including the "Shadow Rock Slim" and on 'high' it comes in at 40.4 dBa. Which is, very good.

Here's the review. of the Shadow Rock Slim

frostytech.com/art…769
Nate149213/10/2019 17:01

You're right, it is definitely not 20 dBa.Looking at Frosty's big …You're right, it is definitely not 20 dBa.Looking at Frosty's big list...http://www.frostytech.com/articleview.cfm?articleid=2802&page=5A few of the other Be Quiet products were tested, including the "Shadow Rock Slim" and on 'high' it comes in at 40.4 dBa. Which is, very good.Here's the review. of the Shadow Rock Slimhttp://www.frostytech.com/articleview.cfm?articleID=2769


When I said 'not 20dBA', I was referring to the Antec unit I have though. I suspect this Be Quiet is still quieter than the Antec I have now - if that's what you meant? That the Be Quiet range are good?

xxbluedragonxx13/10/2019 09:23

With these tower style heatsinks, if your mobo supports it you can always …With these tower style heatsinks, if your mobo supports it you can always jerry rig another fan on the other side (zip ties or some clips) volt control and the blocks tend to perform better


You have to be careful with that, if you don't get similar speed fans for the other side you can create positive or negative pressure which can hamper cooling and/or noise. There might be a good article somewhere on that but I've seen it suggested a few times not doing it unless you can match the fans and run them off the same controller (therefore same speed).
plewis0013/10/2019 17:05

When I said 'not 20dBA', I was referring to the Antec unit I have though. …When I said 'not 20dBA', I was referring to the Antec unit I have though. I suspect this Be Quiet is still quieter than the Antec I have now - if that's what you meant? That the Be Quiet range are good?You have to be careful with that, if you don't get similar speed fans for the other side you can create positive or negative pressure which can hamper cooling and/or noise. There might be a good article somewhere on that but I've seen it suggested a few times not doing it unless you can match the fans and run them off the same controller (therefore same speed).


The Be Quiet range is good, it is fairly quiet, but none of the coolers are really going to be down to 20 dBa under high fans.

As you said, your Antec unit is likely louder and the Be Quiet range is fairly good.

I have heard about installation issues with this heatsink, but it is a good price.

The Hyper 212 Evo is good around this price too, but it is a bit louder, but also cooler, when comparing.
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