60mm 80mm fan adapters

[Elmo]

I have a Global Win FOP38 6800rpm. For less noise, I am thinking of getting a 60mm to 80mm fan adapter and put that on the heatsink. Firstly, is this a good idea and if so, does anyone know a *quiet* good cooling 80mm fan. And also I need advice on what adapter to get.

Correct me if I'm wrong, but I have heard a bigger, slower fan is as effective as a small fast fan.

[Bonka]

People will tell you that fan adaptors, because it's design, will create back pressure and you will lose some of those cfms. Anyways, it does cut down on noise if you buy a good 80mm fan. I'd suggest the Sunon fans. I'm not sure about the Panaflo ones. There's an 80mm delta that pushes about 57cfm at 44dbs. I recall it was the VHE model suffix.

I'm hoping this is a legitimate point, but if you buy a powerful enough 80mm fan, even though it may lose a few cfms in the process, it will still perform better than a 60mm.

[3DMike]

A larger fan is often a better choice.

Because of the larger blades the fan has to spin slower to move the same amount of air. This will mean les mechanical noise from the motor but still the same amount of air noise.

Ive not tried a fan adapter, but from what ive read and a bit of lateral thinking they seem a bit of a waste of time. Think: you are forcing a column (cone?) shaped air mass down to a smaller diameter in the space of only a few millimeters, this will vastly increase back pressure thus lower cfms.

On th other hand they dont cost much and anything is worth a try, just keep a close watch on temp.

[rivercom9]

Check here for fans: http://www.svcompucycle.com/fans.html

[rivercom9]

Theyve got a good sellers rating. 6 outta 7

[BillA]

I just bought an 80mm Papst 8412 NGL from Directron.com (http://www.directron.com/papst8cm.html)
which at 12 dba cannot be heard

I have a 60 x 80 (black cone shaped) fan adaptor from from coolerguys.com (http://www.coolerguys.com/cpucool/filtersguard.shtml) to be delivered tomorrow

I'll let you know

I previously replaced the 3 case fans (in a Lian LI P60) and the psu fan with the Silencer 20 dba fans from pcpowercooling.com (http://pcpowercooling.com/pdf/silencer80mmfan.pdf)

and I had put a hd in a Silentdrive box from Directron.com

the fan change had a Big effect, the hd box was HUGELY successful

these GD computers can be made silent, but it takes some effort - and cash

be cool

[Elmo]

80mm Papst 8412 NGL is only 19.4cfm. Are you sure thats good enough in terms of effectiveness in cooling?

[BillA]

enough for which CPU ?

in my case a Duron (not OCed) with a Gladiator hsf
(with the cheap fan running on 7V, to be replaced with the Papst)
the thought being to use a fairly good hs, with little air

for a big T-bird overvolted, perhaps not

but one needs to accept that SILENCE may come at the cost of somewhat higher temps

can't kiss ALL the girls, eh

be cool

[Elmo]

How about I get a 60mm to 92mm adapter and get the Enermax variable speed fans from www.coolpc.com.au

Should I go for 80 or 92?

[Yodums]

Go for the 92mm fan adapter with the 92mm Sanyo Denki which is 36dBA, it can be found here:

http://www.sidewindercomputers.com/sanyodenki92mm.html

The fan was so quiet I thought my speakers weren't working so I turned it up to about half way to the maximum to actually here it.

IT pushes alot as well.
Yodums

[Elmo]

umm....I can't find any Australian retailers that sell the Sanyo Denki 92mm. What's the best one from www.coolpc.com.au?

[Elmo]

Another problem, my FOP38 uses clips to hold on the fan and I can't figure out how to remove the fan. Does anyone know how?

[klosters64a]

Use your fingers to pull the clip up and away from one of the fan's holes. Then free the remaining 3 ends of the spring-wire clips that catch the fan's holes. Needle nose or hemostats make this easier.

If you wish to duplicate the cooling ability of a Delta 38 60mm fan by using an 80mm fan and fan adapter, a 68 cfm 80 mm fan is needed.

If your CPU can stand a ~30% reduction in cooling an 80mm 50 cfm fan can be zip-tied to the HS. Much less noise. Just use a metal file to dull the sharp corners of the upside-down "shelves" of the FOP-32/38 or Vantec 60450D. Then wash the HS well. Metal dust and circuits ain't good!

[lennytiger]

less noise???? higher temp, with less noise, sacrilidge!! ;)

[nick_woods]

I replaced the noisy Delta fan on my Coolermaster HCC02 with an 80-60 adapter and an evercool 29CFM fan (all from http://www.theoverclockingstore.co.uk/)

The CPU temp went up from 37C to 41C under load (Athlon XP1600+) but the noise level went from unpleasant to just a quiet wooshing sound.

Now I've unlocked the XP i'm getting about 51C under load running as an XP1900+ at 1.85 volts , which is a little higher than i would like although its still ok. This is after 30 mins on full load in a cool room, so I'm a little concerned about what will happen after a couple of hours on a hot day.

I am going to try reversing the fan (so that it sucks instead of blows) to see if that makes any difference. I'll let you know what happens.

If it doesnt work I might go for a Sunon or Thermaltake with a bit higher flow and a little more noise.

Regards

Nick

[Intraveinous]

Get a Panaflo instead... Good air output, low noise. Mitsubishi fans are pretty good too. I got a bunch of 80mm Mitsubishis on eBay that push 40CFM at about 32dbA. In fact... I looked out on Ebay again and found the same dealer selling more of them...
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1323482141

These are great fans, quiet, and powerful enough to work well.
Peace
John

[Koooler King]

I've used these adapters with good success. If properly designed, the flow loss is minimal ... as it works out, from a flow standpoint, a 15 degree, curved taper is best in a 60 - 80 adapter, I think that makes it about 1.5 to 2" long. Don't use one that has a grid in the opening ... the grid is supposed to help straighten the flow, but with most microfans, it is not needed and will only be a restriction. There is no advantage to making the adapter longer, say 3+ inches, that WILL add to flow resistance.

Overall, an 80 mm fan will flow better because of (2) things: it has a larger surface area plus a better ratio of hub size to blade size. It is quieter due to the slower rpms it turns for a given flow, and the noise tends to be at a lower pitch and more tolerable. Of course, the real question is, "will it fit"? Good luck!

Koooler King

PS: For you car enthusiasts, comparing a 60 mm fan to an 80 mm fan is like comparing a Chevy small block vs. a big block. A 60mm x 25mm deep Delta fan at 6800 RPM flows about the same as their 80mm x 38mm deep at 5000 rpm ... the small fan "whines", while the large one "rumbles" ... nothing like "cubic inches"! Go to the Delta fan web site and look at the flow vs. pressure, vs. noise curves ... very technical, but a good study if you are interested!

PPS: Whatever you do, don't connect one of these fans to your mobo 3-pin connector ... they draw too much current and most likely will "fry" it ... do use a 3-pin fan to 4-pin adapter and plug into your power supply's drive connector!

[samoth]

Hi there... seems I'm THE greenhorn in your OC's community...:rolleyes:
No, I haven't done ANYTHING to my machine yet. Hope I'm eligible to raise a question nevertheless... ;)

I'm using a XP 1600+ on a Gigabyte 7 VTX with a noname-60mm-NOISY-4500rpm-fan. I carefully read the thread above, but some questions remain. Let me try to draw a conclusion and ask you to correct me if I'm wrong:

1) in order to use a 80mm-fan I DO need an adapter?
2) do these adapters fit on any heatsink?
3) does the 80mm-fan use the same power supply as my current one?
4) what is this discussion about the 3-to-4-pin-adapters about?
5) would you recommend the Mitsubishi-fan offered on ebay (see Intraveinous' post) for my system?

I'd be pleased for any comments on these simple questions. :)

[nick_woods]

Hi ! here are a some answers based on what I've learnt recently (I've just been through the same exercise)

1) yes

2) they should but you may need to buy some screws of the correct length (I had to) although in a lot of cases the screws it
came with will be fine

3) It depends on the fan you get and what you have at the moment (sorry but thats it really) -you'll need to check the specs

4) If you look at your mobo you'll see some small 3-pin adapters for the fan to plug into (your existing heatsink fan probably goes into one). These are ok up to a point but if you put too powerful a fan onto them you may burn them out. It all depends on how much power the m/b can supply and how much the fan needs

The 4-pin connections are the bigger 'Molex' (usually white) connectors that power your hard disk etc. Some fans come with these connectors or are 3-pin fans with a 3-to-4 pin adapter so you can connect them to the 4-pin supplies. The advantage is that these supply a lot more power than the motherboard so you wont burn anything out, although the drawback is that you wont be able to detect the fan speed from the bios.

5) Cant help with these - sorry

Regards

Nick

[oc jason]

be careful as when from 60 to 80mm i raised like 5c in temps, it was due to the adapter raised the fan so far off the HS that the air was just getting sucked over the tip top of the fins and not the base. id not use an adapter, but just find a way ot mount the 80mm directly on teh HS, or make a slim mount yourself, and just seal it with tape.

So far i havent see a fan beat the panaflow high flow 80mm its 40 cfm at 32db.

medium flow is 32 cfm at 28 db, and low flow is 28 cfm at 21db


www.caseetc.com

www.pcmods.com

[BillA]

installed the Papst fan and Innovatek adaptor previously described

have a 1 to 2^C temp increase, but no apparent reduction in the (already vastly decreased) noise level
- in plainer words, the other four 20dba Silencer fans (2 undervolted) make more noise than the Papst 18dba fan plus adapter
[the hd is not a factor as it is in a Silentdrive box]

slightly better cooling with the undervolted cheapo Gladiator fan

for this kind of setup, save your $40

be cool

[Koooler King]

As a practical matter, you don't have to buy a "high tech" molded fan adapter to use an 80mm fan with a heat sink meant for a 60mm fan. If you are handy, you can make your own. However, the commercially available adapters do have the same fan hole size and screw locations at the 60mm and 80mm ends as fans of the same size. If your heat sink already has mounting holes or a shroud for a 60mm fan, then an adapter is a very clean way to go to install an 80mm fan. The bottom line is that whatever the attachment method or adapter, make certain that the interior is smooth with no sharp turns or edges, and that it is sealed between the heat sink and fan so all the fan air goes through the heat sink ... again a benefit of a ready fitted adapter.

If you still desire to make your own adapter, a good guideline for adapter length is to make the distance between the fan and the top of the heat sink, at minimum, equal to the diameter of the fan motor hub, but not more than 2 times the hub diameter ... probably not much difference within that range. At that point, the adapter length will be mostly determined by materials on hand and what will fit into the case. Good luck.

Koooler King

[samoth]

thanks guys for the detailed information. I'll try my best and let you know if I was lucky - or not...

for some reason the previously mentioned stores' offers are missing at least one part: some shops offer fans AND 80-60-adapters, but NO 3-to-4-pin-adapters; some other DO have those, but DON'T sell 80-60-adapters... seems there's no way around paying double shipping fees... :(

one more question though: my XP 1600 runs at 56 degrees idle and the temperature raises up to 60-something under load. Is this still in the limits?


enjoy the rest of your Sunday...

samoth

[oc jason]

see i too had better cooling results with the normal HS fan , due to most adaptors raise the 80nmm too far from teh HS base..defeating the purpose

[Elmo]

I got the 60mm to 80mm adapter along with the Sunon 3000rpm 39CFM fan, but it was out of stock so they sent me the 3900rpm 50CFM fan. It a lot better than the FOP38, but still isn't the one i initially wanted. I was wondering if anyone can estimate how much my temperature will go up if I have it exchanged for the 39CFM?