Review Jiushark JF13K Diamond Review: Innovative Air Cooling, Ideal for SFF Systems

bit_user

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Thanks for the review! I like your questions. It's a little surprising that stronger fans didn't provide much benefit. As for the RAM cooling, another area that's often covered in downdraft cooler reviews is measuring VRM temps, which tend to run so hot they always benefit.

However, I'm quite disappointed that it wasn't compared to the Noctua NH-C14S down-draft 140 mm cooler. I like using down-draft coolers, and it seems that's still the best on the market. If it's been outdone, I'd like to know about it.

Also, something I often do is flip the fan so it's running in an updraft configuration, if it's sitting right next to an exhaust fan (as in your picture). That has two benefits:
  1. It's not fighting the exhaust fan.
  2. It pushes heated air right into the airstream of the exhaust fan, rather than leaving it to circulate around in the case.

It would be interesting if you'd publish an update (or maybe a new article that also includes the NH-C14S) to test the effects of an updraft configuration.

BTW, it's hard to tell from the pictures, but does that middle heatpipe really go straight in between the fans? That seems not ideal...
 
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Is this a GPU cooler on a CPU? It is a GPU cooler on a CPU!

Heh.

Jokes aside, this is a more extreme take on BeQuiet!'s Shadow Rock TF2* and I really like that cooler; I actually use it and wholeheartedly recommend it for SFF builds. So this doesn't surprise me that much. It could perform better though; given the "metal" area, it feels like it may be underperforming a bit. Also, I'd be careful with slapping the "SFF" moniker with it, since there's a lot of cases that just can't fit such a wide cooler area. I know it wouldn't fit in mine, for example.

As per always, thanks Albert for the findings.

Regards.
 

bit_user

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Is this a GPU cooler on a CPU? It is a GPU cooler on a CPU!
No, GPU coolers tend to have vapor chambers. This has heatpipes above a regular heatspreader. For its size and weight, it's a lot less efficient than a GPU cooler, but maybe not for its price.

I wish more CPU coolers had vapor chambers. I'm reminded of this:


...just wish it weren't so heavy or expensive.
 
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No, GPU coolers tend to have vapor chambers. This has heatpipes above a regular heatspreader. For its size and weight, it's a lot less efficient than a GPU cooler, but maybe not for its price.

I wish more CPU coolers had vapor chambers. I'm reminded of this:

...just wish it weren't so heavy or expensive.
You didn't read the rest, uh?

Le sigh...
 

bit_user

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You didn't read the rest, uh?
I always read all of posts I reply to.

I felt that by calling it a "GPU cooler", people who don't know a lot about GPU coolers wouldn't know in what sense you were "joking". I thought it was a good opportunity to point out a significant difference between high-performance GPU air coolers and (nearly all) CPU air coolers, including this one.

Plus, I had been too lazy to look up the name of that ProSiphon cooler, before. This gave me further cause to do so, and my activation energy was overcome.
 
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tamalero

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Is this a GPU cooler on a CPU? It is a GPU cooler on a CPU!

Heh.

Jokes aside, this is a more extreme take on BeQuiet!'s Shadow Rock TF2* and I really like that cooler; I actually use it and wholeheartedly recommend it for SFF builds. So this doesn't surprise me that much. It could perform better though; given the "metal" area, it feels like it may be underperforming a bit. Also, I'd be careful with slapping the "SFF" moniker with it, since there's a lot of cases that just can't fit such a wide cooler area. I know it wouldn't fit in mine, for example.

As per always, thanks Albert for the findings.

Regards.
Didn't Hardware Nexus review this like 2 months ago?
 
I always read all of posts I reply to.

I felt that by calling it a "GPU cooler", people who don't know a lot about GPU coolers wouldn't know in what sense you were "joking". I thought it was a good opportunity to point out a significant difference between high-performance GPU air coolers and (nearly all) CPU air coolers, including this one.

Plus, I had been too lazy to look up the name of that ProSiphon cooler, before. This gave me further cause to do so, and my activation energy was overcome.
I'll bite and say you're wrong on both accounts:


Are vapour chambers better? Yes.
Are they absolutely necessary for a GPU at the high end? No.
Are they necessary for CPUs? No.
Are you being annoying? Yes.

Also, the second one claims 400W of dissipation, so I'd say that's high end enough. And you don't need to be a knight in shiny armour for readers that can't even be bothered to read where I say, quite explicitly, I was joking and then "correcting" my joke (after labeling as such) with some weird rambling, an incorrect one I may add, about it.

Ugh... Geez... I'll just ignore you next time.
 

bit_user

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I'll bite and say you're wrong on both accounts:
I didn't say GPU coolers always used vapor chamber, and just because there's a product which doesn't use one doesn't necessarily mean anything. The one you linked is rated for up to 400 W. The RTX 4090 FE has a TDP of 450 W and does have a vapor chamber:


Nvidia often uses them to improve the effectiveness of their cooling solution.

Are you being annoying? Yes.
Your "joke" wasn't funny. It wasn't obvious what you meant by it, and it seemed a good opportunity to talk about some differences between high-end CPU coolers and GPU coolers.

If you're feeling annoyed and defensive, it's probably because you subconsciously know your joke was bad. Instead of attacking me, your time & energy would be better spent working on your material.

Ugh... Geez... I'll just ignore you next time.
Suit yourself, but somehow I doubt it.
 

Albert.Thomas

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However, I'm quite disappointed that it wasn't compared to the Noctua NH-C14S down-draft 140 mm cooler. I like using down-draft coolers, and it seems that's still the best on the market. If it's been outdone, I'd like to know about it.
I really haven't explored SFF cooling properly, but that will be changing soon. We'll be setting up a SFF case and starting this testing with 5 SFF style coolers that Noctua has sent. But I'm not sure if that particular model was included.
BTW, it's hard to tell from the pictures, but does that middle heatpipe really go straight in between the fans? That seems not ideal...
Indeed, it is.
 
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bit_user

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I really haven't explored SFF cooling properly, but that will be changing soon. We'll be setting up a SFF case and starting this testing with 5 SFF style coolers that Noctua has sent. But I'm not sure if that particular model was included.
Yeah, I think the NH-C14S is too tall to qualify as a SFF cooler. It might be possible to move the fan under the fins (or maybe I'm thinking of the original NH-C14 (not the updated, "S" version)?).

I gather Noctua uses the "L" prefix to denote low-profile coolers. In that case, the NH-L12S is probably the best in that lineup.

I am somewhat amazed at the performance Noctua manages to extract from coolers that don't seem to boast exotic features or technologies, such as vapor chambers, direct-touch heatpipes, special black paint, etc. I would love to know more about how they do it. I have a hunch it just comes down to really solid engineering & precision manufacturing.
 

bit_user

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I wish that they make a non SFF Version of this cooler wit thicker Radiator and with more Area as well with 2x140 fans.
I wonder if the base has room for any more heat pipes. If not, then I doubt how much it'll help just to space them out, more. Or, if you'll get much more cooling by having a larger number of smaller-diameter heatpipes crammed in there.

The second observation I have is that the picture shows the cooler already meeting the case exhaust fan. So, that means it's already blocked from getting any larger on at least one side. You could offset it, of course, but making it asymmetric will at least increase its weight, if not have other implications.

I think it would crush any Aircooler in the market.
Maybe we'll find out.
 

newtechldtech

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The second observation I have is that the picture shows the cooler already meeting the case exhaust fan. So, that means it's already blocked from getting any larger on at least one side. You could offset it, of course, but making it asymmetric will at least increase its weight, if not have other implications.

The rear i/o space is 159mm , you can easily fit 140 fan/rad over there before you hit the PC case. ... Actually in many SFF cases they managed to fit 280 (2x140) radiator over the CPU Area for water cooling.

figure-6-4.jpg
 

MiniITXEconomy

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I always read all of posts I reply to.

I felt that by calling it a "GPU cooler", people who don't know a lot about GPU coolers wouldn't know in what sense you were "joking". I thought it was a good opportunity to point out a significant difference between high-performance GPU air coolers and (nearly all) CPU air coolers, including this one.

Plus, I had been too lazy to look up the name of that ProSiphon cooler, before. This gave me further cause to do so, and my activation energy was overcome.

I appreciated the distinction, sir! As a budding enthusiast, I'm always thankful for these useful bits of info, that help me to better understand the systems I build. So for that, you have my gratitude. And, yeah... his joke was fairly corny.
 
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bit_user

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The rear i/o space is 159mm , you can easily fit 140 fan/rad over there before you hit the PC case. ... Actually in many SFF cases they managed to fit 280 (2x140) radiator over the CPU Area for water cooling.

figure-6-4.jpg
That diagram is 90-degrees rotated from where it looks like they're currently constrained. Here's the picture I was talking about:

x2sRiCjnWCTck39DfLghME-970-80.jpg.webp



See how it's nearly touching the case exhaust fan, on the left side? It definitely looks like there's less than 20 mm to spare. If you want it to lean way over to the right by like 30 or 40 mm, okay. That's not ideal, I think.

The first improvement I'd make is to do something different with that middle heatpipe. And, as I mentioned above, it also seems like these fans would be "fighting" the case exhaust fan. I'd rather flip the fans and put them on the underside. That would both reduce height and push the heated air up into the exhaust stream, rather than recirculating it around the case.