P183 intake fans - Slip Stream or Nexus?

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eddieck
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P183 intake fans - Slip Stream or Nexus?

Post by eddieck » Wed Mar 10, 2010 8:29 pm

I'm going to be picking up a P183 in a few days and I just received a few Nexus 120mm fans from Newegg. These will be going on the D14 I am also planning to purchase. I'm also going to get a Slip Stream for rear exhaust. I'd like to use a Slip Stream for an intake but I'm not sure how that'll work because of its poor static pressure. Should I use my extra Nexus for that or will the Scythes be OK?

TIA!

thejamppa
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Post by thejamppa » Wed Mar 10, 2010 8:46 pm

Hello! There won't much much differences in temperatures between two fans I'd guess. Slipstream are pretty silent out of box but nexus are inaudiable at 7v. Eitherway both are good intake fans. Difference will be maginal if that. I'd probably go for slipstream asthey move more air at same rpms than Nexus.

ces
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Post by ces » Wed Mar 10, 2010 11:06 pm

The slipstreams seem to handle static pressure OK. Scythe uses the slipstream blades on the PWM fans for many of its heatsinks.

The 1200M slipstream is the best. It starts at well below 5v. You can run it at 5 volts, get a fair amount of air, and it is silent.

You can crank it up to 12 volts and get one heck of a lot of air.

You should run the intake fan higher than the exhaust fan so that you have a positive pressure case. This keeps dust from forming and collecting.

discopig
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Post by discopig » Thu Mar 11, 2010 6:37 am

Can't speak to the nexus fans, I know they are sacred here though. I have slipstreams in my case (SY1225SL12SH). The reason I went with the SH ones is because they reliably start at 5V and run about 600 rpm. I have two of those as intake fans (and one on my heatsink) and it is very quiet.

When video is encoding all night, I flip the switch and the fans run at 1900rpm (i.e. vacuum cleaner) and my e6600 which is overclocked runs about 41-42 degrees which chugging away at 100%.

If you don't want the hassle, I actually like the 800rpm models. I think it pushes enough air and is also very quiet. That way no volt modifications to worry about, just plug it in a voila, silence.

Adam

ces
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Post by ces » Thu Mar 11, 2010 10:03 am

discopig wrote:I have slipstreams in my case (SY1225SL12SH). The reason I went with the SH ones is because they reliably start at 5V and run about 600 rpm. I have two of those as intake fans (and one on my heatsink) and it is very quiet.

When video is encoding all night, I flip the switch and the fans run at 1900rpm (i.e. vacuum cleaner) and my e6600 which is overclocked runs about 41-42 degrees which chugging away at 100%.
Adam
Interesting. SPCR says that the SH slipstreams perform as follows:

12V
39 dBA@1m
1780 RPM
79 CFM

9V
26 dBA@1m
1340 RPM
54 CFM
7V
~18 dBA@1m
630 RPM
21 CFM

5V
<18 dBA@1m
400 RPM
12 CFM

So does that mean your experience varies from this? How do you measure your RPMs

Just wondering. One of the things you never know about benchmarks is how much variance there is in test results. If you are getting your results and SPRC is getting theirs. That is a fair degree of variance.

I must say that I do like my 1200 rpm slipstreams. Mostly because I can just set them at 5v and get the most quiet air possible with the least tweaking.

But you make the 1900 rpm ones look very interesting.

eddieck
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Post by eddieck » Fri Mar 12, 2010 8:10 pm

I may be able to get a P182 cheaper. With the more restrictive intake grills how would the Slip Streams work?

discopig
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Location: Edmonton, AB

Post by discopig » Fri Mar 12, 2010 9:42 pm

Yup, I've got three of them, all plugged into a scythe Kama bay for rpm monitoring and the power runs through switches that I can use to switch the fans from 5 - 7 - 12 v.

my speeds on each fan (to show my personal variance)

12V - 2190 1860 1940
7V - 1080 990 970
5V - 6000 560 630

Again eddieck, the slipstreams are said not to have much static pressure which in theory at least makes them less ideal than the nexus for restricted airflow settings. If you had to choose between the two, I would probably base my decision more on cost and availability in your area. If all else is equal, I go scythe because that is what I know and I have had good luck with them. But you can see my bias, so take it with a grain.

Any nexus fans around here?

discopig
Posts: 26
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Location: Edmonton, AB

Post by discopig » Fri Mar 12, 2010 9:45 pm

Actually, just after I posted that I had a look at it and was surprised how much difference there was at 7V, but then I remembered, it isnt at 7V.

I didnt want to do the 7V trick, so instead I put a variable resistor in the circuit with my switches and dialed them in to about 1000 rpm, which I thought was an ideal setting. The 12 V and 5V numbers are correct though.

Sorry about that!

eddieck
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Post by eddieck » Sat Mar 13, 2010 12:42 am

Both are available for roughly the same price so that's not an issue. Just trying to go with whatever one will give me better performance given the operating conditions (pulling from that restrictive P182 grill).

danimal
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Post by danimal » Sat Mar 13, 2010 11:12 am

eddieck wrote:I may be able to get a P182 cheaper. With the more restrictive intake grills how would the Slip Streams work?
clip out most of the intake grills in front, regardless of what fan you run.

you only need enough support to keep the mesh air filter from getting sucked into the fan.

p182 vs. p183, there are significant differences in the design of the mesh air filter setups, but both are fully functional.

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