Panaflo L1A or M1A for 5v (Antec TruePower) mod?

Athlon Powers · Post by **Athlon Powers** » Sun May 18, 2003 5:31 pm

My TruePower has special fan connectors that I believe perform either the 7 or 5v mod. However, which fan is better at 7v? I know the M1A would get more airflow but would it be louder than the L1A? I want it to be almost inaudbile (or really quiet) but still have good airflow. For this purpose I think the M1A would be better but if they kick in at 12v they would be much louder than the L1A.

I think im gonna go with the M1A but any comments? Thanks!

Will35 · Post by **Will35** » Sun May 18, 2003 5:47 pm

Which TruePower PSU are we talking about, Atomic?

Athlon Powers · Post by **Athlon Powers** » Sun May 18, 2003 5:48 pm

Will35 wrote:Which TruePower PSU are we talking about, Atomic?

Antec TruePower 330. Since it 5v the fans I wondered if a M1A would cool better at 5v while still remaining pretty silent.

While Im at it (along the same lines), if the M1A is better at 5v would it also be a better fan to replace the internal TruePower fans with, since they are undervolted also? Of course, three of these babies would make a rucus if the temps got so high that the TruePower kicked them to 12v but i've never had that happen before...so....

Will35 · Post by **Will35** » Sun May 18, 2003 5:58 pm

If it's THIS PSU I'd go with the M1A. It seems to have the same setup (Dedicated Fan Only power connectors) as the 380 that came w/ my Sonata case. If you want to maintain the PSU fan monitoring you'll need to find a BX which has a RPM lead. Digi-key will have them back in stock the first part of June.

Athlon Powers · Post by **Athlon Powers** » Sun May 18, 2003 6:04 pm

Will35 wrote:If it's THIS PSU I'd go with the M1A. It seems to have the same setup (Dedicated Fan Only power connectors) as the 380 that came w/ my Sonata case. If you want to maintain the PSU fan monitoring you'll need to find a BX which has a RPM lead. Digi-key will have them back in stock the first part of June.

The one and only! I think ill order two M1As for my case and if those are good at 5/7v I'll get one for the PSU. Thanks for the help Will35!

Anyone else with comments?

Athlon Powers · Post by **Athlon Powers** » Sun May 18, 2003 8:08 pm

Anyone?

ciz28 · Post by **ciz28** » Sun May 18, 2003 8:25 pm

i'm running one l1a in my 380s psu and one on my hsf. the psu still controls the fan voltage, i just lose the ability to monitor the rpm which doesn't bother me at all. the one on my hsf is running on the fan only connector on an slk-800a. my palomino 1700+ is at 1833mhz with 1.85v (which should be putting out around 100 watts) and maxes out at about 63c. it's a little high for my liking, but it's perfectly stable and incredibly quiet. the only other fan in my case is the antec 120mm at 5v that came with my sonata, so i don't really have that much case air flow. all in all, i'd say that anything more than an l1a is unnecessarily loud in a well setup case. conclusion? stick with the l1a's.

herosformula · Post by **herosformula** » Sun May 18, 2003 9:44 pm

If you are looking for the tachometer versions, then Digikey has them.
80mm M1 version, FBA08A12M1BX Digikey#P11039-ND
92mm L1 version, FBA09A12L1BX Digikey#P11043-ND
92mm H1 version, FBA09A12H1BX Digikey#P11042-ND
120mm H1 version only, FBA12G12H1BX Digikey#P11050-ND

In my power supply I dumped the outside 80mm and just used the inside 92mm H1, and also serves double duty since I removed the case fan as well.

Athlon Powers · Post by **Athlon Powers** » Mon May 19, 2003 6:19 am

Nobody answered my question, would I be better off at 7v with M1As or L1As? Or should I just attach some L1As to a 12v line?

I think im leaning with M1As at 7v.

Will35 · Post by **Will35** » Mon May 19, 2003 6:26 am

Use the M1As with the PSUs fan circutry as they are close to the same db as the L1A at low voltage and have the added benefit of being able to move more air should the need arise (this is a "sorta" quote of MikeC). He's addressed this in the forums somewhere but I can't seem to locate it right now.

Athlon Powers · Post by **Athlon Powers** » Mon May 19, 2003 6:36 am

Thank you for the reply Will35! That is exactly what I wanted to know, M1As it is then.

JimK · Post by **JimK** » Mon May 19, 2003 7:41 am

I'd go with the M1A/M1BXs but then that's the way I am. Connect the fan to the stock speed/temp controller just like the original fans, then this summer when things heat up you can say, "The fans are getting louder, it must be hot in there." Rather than "What's that stench?

It smells like an electrical meltdown."

Post by **MikeC** » Mon May 19, 2003 8:30 am

Panaflo M thread --
http://forums.silentpcreview.com/viewto ... sc&start=0

ez2remember · Post by **ez2remember** » Mon May 19, 2003 9:26 am

Whatever you do don't go for the H1a.

It is loud! Probably not far off many standard stock fans.

Athlon Powers · Post by **Athlon Powers** » Mon May 19, 2003 9:31 am

Acutually, do I use two M1As at 5v (roughly 21DB at 17CFM) or do I use two L1As at 12v (21DB at 24CFM). With the two L1As I would get about 14 more CFM than with the M1As. Now im all confused as what to do...

Post by **MikeC** » Mon May 19, 2003 9:46 am

AtomicDude512 wrote:Acutually, do I use two M1As at 5v (roughly 21DB at 17CFM) or do I use two L1As at 12v (21DB at 24CFM). With the two L1As I would get about 14 more CFM than with the M1As. Now im all confused as what to do...

The Ls at 21 dBA at NOT quiet, at least not to me. 2 of them would give you 24 dBA. Let's put it this way: I have yet to hear a single 12VDC fan that is quiet enough at 12V, This includes the super slow Ahanix fan in their silenx psu. Probably the L1A at 8~10V is about the noisiest fan I'd put in my systems. The 2 Ms at 5V would be far preferable noise-wise, to even 1 L1A at 12V.

Will35 · Post by **Will35** » Mon May 19, 2003 9:49 am

Panaflo M thread --
http://forums.silentpcreview.com/viewto ... sc&start=0

Thanks for digging that up, Mike

Athlon Powers · Post by **Athlon Powers** » Mon May 19, 2003 10:26 am

WOW! Thanks for the info Mike, I am gonna get two M1As as soon as I can find some...

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