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#1
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how do i measue fans for the computer. (lol i know)
seems stuipid but where do i measure the actuall fan. a picture will
be very helpfull. also will going a couple of days w/ out fans hurt my comp. just bought a new video card and power supply and the previous fans were sottered into the power supply. the new power supply has a big fan moving some air in the computer but not that much. could you also reccomend some good case fans. thanks. thanks. |
#2
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how do i measue fans for the computer. (lol i know)
"korky122" wrote in message . .. seems stuipid but where do i measure the actuall fan. a picture will be very helpfull. also will going a couple of days w/ out fans hurt my comp. just bought a new video card and power supply and the previous fans were sottered into the power supply. the new power supply has a big fan moving some air in the computer but not that much. could you also reccomend some good case fans. thanks. thanks. Example: an 80mm fan measures 8cms across its entire width. =8x10mm. These are the ones normally mounted in the case. Fans depend on your budget, and what you want to use them for. ie. general computer use or high speed gaming. |
#3
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how do i measue fans for the computer. (lol i know)
In article , lid
(korky122) wrote: seems stuipid but where do i measure the actuall fan. a picture will be very helpfull. also will going a couple of days w/ out fans hurt my comp. just bought a new video card and power supply and the previous fans were sottered into the power supply. the new power supply has a big fan moving some air in the computer but not that much. could you also reccomend some good case fans. thanks. thanks. That is like asking whether it is OK to run your car without water in the radiator. You know it is not being cooled properly. One thing you can do, is take the side off the computer, and take a large AC powered fan, and point it at the components in the computer. That will provide a measure of cooling until you get your computer case cooling fixed. For help with fans, it is usually a good idea to tell us what computer case you are using. If you have a URL to the web page with a picture of the computer case, that helps. Knowing the vintage of the computer (how old it is) and the processor type, allows the estimation of how much cooling might be needed. If you had a 35W Pentium 3 processor, you might not need quite as much cooling for the computer case, as you would with a 115W Pentium4. A general recommendation, would be one intake fan in the front of the computer case, and one exhaust fan. The fan in the PSU doesn't count, because it is so slow. Some computer cases have room to mount a fan down low, in the front of the computer, and room for one more fan, just below the PSU in the back of the computer. Air moves from front to back in the case, so the front fan pulls in, and the rear fan pushes out. http://web.archive.org/web/200402012...and_noise.html CFM = 3.16 x Watts / (allowed temp rise deg F) If you had a computer that dissipated 150W while gaming, and you set the computer case air temperature rise to 10F (well cooled) or 13F (OK cooling), then the number of cubic feet per minute would be 47.4 and 36.5 CFM respectively. (Note - the "dissipated" number is the real amount of power the computer uses, and it is _not_ your PSU watts rating. You can use a 450W power supply on a computer that is only consuming 150W, and the fan is selected for 150W of heat and not 450W!) http://dkc3.digikey.com/PDF/T062/1683.pdf 60 x 25.5 14.83CFM 36.0dBA FBL06A12H1A -- "H" equals High 60 x 25.5 13.06CFM 32.0dBA FBL06A12M1A -- "M" equals Medium 60 x 25.5 14.83CFM 29.0dBA FBL06A12L1A -- "L" equals Low 80 x 25.5 35.31CFM 42.0dBA FBL08A12U1A -- You can hear this "Ultra" 80 x 25.5 30.01CFM 39.0dBA FBL08A12H1A 80 x 25.5 24.71CFM 33.0dBA FBL08A12M1A -- Quiet enough 80 x 25.5 17.30CFM 26.0dBA FBL08A12L1A 92 x 25.5 54.72CFM 47.0dBA FBL09A12U1A 92 x 25.5 45.89CFM 40.0dBA FBL09A12H1A 92 x 25.5 45.9 CFM 40.0dBA FBL09A12H1BX -- BX means fan speed monitoring 92 x 25.5 35.30CFM 36.0dBA FBL09A12M1A 92 x 25.5 31.77CFM 33.0dBA FBL09A12L1A 120 x 38 86.49CFM 48.0dBA FBL12G12U1A 120 x 38 81.19CFM 46.0dBA FBL12G12H1A 120 x 38 67.07CFM 41.0dBA FBL12G12M1A 120 x 38 52.95CFM 35.0dBA FBL12G12L1A In the very first entry in the table above, the external dimensions are 60mm x 60mm x 25.5mm. That means the fan is one inch thick. The fan is square, and the 60mm is the outer dimension. To get our 47.4CFM, we could use a 92mm "ultra" fan, with a 47.0dBA noise level. Or we could use a 120mm "low" fan, with a 35dBA noise level. Larger fans can be used for quieter operation, but will only give their rated CFM, if there is sufficient vent space to draw or push the air. You'll need to measure the mounting place for the fan, and see which size it uses. Most fans don't come with a high, medium, low rating, but you should be able to compare the CFM and the noise level to the table of Panaflo fans above, to get some idea what catagory they fall into. If you are getting one of the higher air volume fans, a speed adjuster is handy. You can get multi-channel controllers that fit into a disk drive bay, or one like this can hang loose inside the computer: http://www.newegg.com/Product/Produc...82E16835118217 I've used a 120x120x38 in one of my computers, and even with a fan speed adjuster, it is still loud. When one fan pushes in, and the other fan pushes out, the CFMs don't add together. But the fans will get closer to their rated CFMs if run that way. I don't understand all the details, but there is a curve for fans, where the CFMs drop as the air resistance of the case increases. If you had a fan from a vacuum cleaner, that can handle more pressure drop than a computer cooling fan. Once a computer cooling fan is mounted inside the computer case, the air volume rating drops, depending on how restrictive the vent holes are. My big fan didn't move that much air, until I opened more vent space for it. Also, fans come in two wire and three wire form. In each case, there is a 1x3 tiny fan connector for the mobo. The "BX" fan in the above table, has three wires and allows the fan RPMs to be monitored. As you can see in the table, the rest of them only have two wires. The same is true when you shop for a case fan - a lot of them don't have the RPM wire, so you won't see the RPMs listed by your computer monitor chip. It is hard to find a good fan, that also includes an RPM signal, for case cooling fans. A CPU cooler is much more likely to have the RPM signal present. HTH, Paul |
#4
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how do i measue fans for the computer. (lol i know)
korky122 wrote:
seems stuipid but where do i measure the actuall fan. a picture will be very helpfull. http://www.nidec.com/fanpdfs/ta300dc.pdf |
#5
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how do i measue fans for the computer. (lol i know)
korky122 wrote: seems stuipid but where do i measure the actuall fan. a picture will be very helpfull. also will going a couple of days w/ out fans Not without a processor fan you don't. Not unless you want to repace the processor. You can get away without the case fans for a while. How long will depend on your processor and other components. If you MUST, open up the case and put a big house fan blowing on the motherboard. hurt my comp. just bought a new video card and power supply and the previous fans were sottered into the power supply. the new power supply has a big fan moving some air in the computer but not that much. could you also reccomend some good case fans. thanks. thanks. |
#6
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how do i measue fans for the computer. (lol i know)
On Wed, 03 May 2006 16:37:59 GMT, "
wrote: On Tue, 02 May 2006 14:30:48 GMT, lid (korky122) wrote: seems stuipid but where do i measure the actuall fan. a picture will be very helpfull. also will going a couple of days w/ out fans hurt my comp. just bought a new video card and power supply and the previous fans were sottered into the power supply. the new power supply has a big fan moving some air in the computer but not that much. could you also reccomend some good case fans. thanks. thanks. If you are talking about actual size its pretty standard. Most of the old ones used 80mm. A lot of the newer ones are starting to use HUGE 120mm fans like my new Antec. That way you can use less fans or run it at lower rpm for less noise. I did run into a one weird fan a 90mm or something fan on the MGE case I bought. Compaq/Dell/HP (Gateway??) also commonly use 92mm rear exhaust fans. |
#7
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how do i measue fans for the computer. (lol i know)
On Thu, 04 May 2006 10:50:55 GMT, "
wrote: On Wed, 03 May 2006 18:33:51 -0400, kony wrote: Compaq/Dell/HP (Gateway??) also commonly use 92mm rear exhaust fans. Good to know. You know I cant even remember what my Compaq had. I think it had very few fans since I cant remember taking any of them out when I threw the case away. It was a fairly cheapo plasticky small cramped mid case. Yep, Compaq has for years been one of the main OEMs who liked to use the PSU fan to cool the CPU 'sink or moving to the chassis rear fan when heat levels were getting too high to have a lower RPM PSU fan do the entire job. Sadly some of Dell's fans in recent years tend to get a bit noisey from wear, or it seems a bit of wear in conjunction with the PWM control used by the motherboard. Some (all?) are ball-bearing fans too, so it's not just a matter of relubing them. |
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