Heat raises...You do the math...(or science w/e)gburndred wrote:
Do top case fans even do any good?
My education is paying off for once
well the mobile phones and such are radio recevers and (more importantly) they send radio waves. computers on the other hand are not build to create any radiation. most (all) energy they consume goes into heatWindrider_Melb wrote:
Fair enough.... but its a few watts, at a few GHz... that's pretty powerful compared to mobile phones and transciever towers.max wrote:
we dont. the em radiation prduced by a pc is not high at all so we just let it out into the room. what you catch during 10min out in the sun is way more than i will get in my whole life infront of a pc.Windrider_Melb wrote:
Modders - with the plexan/plexiglass windows where there used to be earthed steel casing, how do you maintain integrity of the faraday cage and prevent escape of microwaves produced by the CPU?
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and: nice mod. like it
But I was thinking more in terms of interference with monitors and suchlike, and security.
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once upon a midnight dreary, while i pron surfed, weak and weary, over many a strange and spurious site of ' hot xxx galore'. While i clicked my fav'rite bookmark, suddenly there came a warning, and my heart was filled with mourning, mourning for my dear amour, " 'Tis not possible!", i muttered, " give me back my free hardcore!"..... quoth the server, 404.
My computer owns, atleast, whats inside
nice cases people! Thanx for liking mine
and my mothers panty's work perfect to prevent dust comming in, great idea isn it?
and my mothers panty's work perfect to prevent dust comming in, great idea isn it?
my lian li comes with a removal dust collector thingy
Oh.....man.....that image is going to keep me laughing for at least a few hours.']['error wrote:
and my mothers panty's work perfect to prevent dust comming in, great idea isn it?
Regarding the fan on top - Almost any fan can help, as long as it is either set up to remove air from the case or assist another fan in removing air (Creating a wind-tunnel type effect).
Most guys I've worked with on case mods have one clear path set up, with an intake and exhaust fan, and then any additional fans are purely extraction. The reason for this is the case will always allow in enough air to replace what you are pulling out (Called make-up air). The reason for the one nice clear windtunnel type arrangement is usually to move the most air across your vid-card/processor.
Most guys I've worked with on case mods have one clear path set up, with an intake and exhaust fan, and then any additional fans are purely extraction. The reason for this is the case will always allow in enough air to replace what you are pulling out (Called make-up air). The reason for the one nice clear windtunnel type arrangement is usually to move the most air across your vid-card/processor.
Dude. Feel free... I'll just reitterate my comments: make sure you have enough cooling before lowering the fan speed this much. And make sure you dont short anything because the laser requires really high volt/amp conversion.Sea_JayUK wrote:
TWIST - REALLY cool idea, mind if i borrow it
Errrr wrong.max wrote:
well the mobile phones and such are radio recevers and (more importantly) they send radio waves. computers on the other hand are not build to create any radiation. most (all) energy they consume goes into heatWindrider_Melb wrote:
Fair enough.... but its a few watts, at a few GHz... that's pretty powerful compared to mobile phones and transciever towers.max wrote:
we dont. the em radiation prduced by a pc is not high at all so we just let it out into the room. what you catch during 10min out in the sun is way more than i will get in my whole life infront of a pc.
and: nice mod. like it
But I was thinking more in terms of interference with monitors and suchlike, and security.
\\'
How do you think your mobile phone generates radio signals using nothing but electricity and circuit boards?
Your CPU produces radio frequency radiation at the clock speed; the electrons are oscillating in the metal circuit tracks at that rate. Old KHz speed processors (like the 6502 and Z80) were not too much of a problem as they produced longer wavelength radiation that has less ionising power. But as CPUs increased to MHz speeds it became more of a problem - creating a true 100MHz bus was a tough nut to crack because of the quantum effects on electron up/down spin cycles that the 90 degree turns in the circuit tracks put on the electrons at that frequency. Also, CPUs started producing radio signals that interfered with their own peripherals and even monitors. I used to have to wrap my external 5.25" floppy drive in foil and put a sheet between my CPU and my monitor.
Nowadays we have GHz processors that are emitting the same radiation that you use to cook your TV Dinners.
Yes the levels are a lot lower than your oven. You'll notice that Dells' plastic cases have metallic paint on the inside. This is called shielding.
Security-wise the signals produced by your CPU and montior can be read by apparatus using a directional receiving dish. Its a common form of industrial espionage.
I'm pretty sure it's not too much of a health risk, but I was just wondering if modders too any precautions.
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first let me get CRT (big fat ones) monitors out of the way. sure they create "lots" of radiation, because thats what they are build to do. they trow em waves at the screen to create a pictureWindrider_Melb wrote:
Errrr wrong.max wrote:
well the mobile phones and such are radio recevers and (more importantly) they send radio waves. computers on the other hand are not build to create any radiation. most (all) energy they consume goes into heatWindrider_Melb wrote:
Fair enough.... but its a few watts, at a few GHz... that's pretty powerful compared to mobile phones and transciever towers.
But I was thinking more in terms of interference with monitors and suchlike, and security.
\\'
How do you think your mobile phone generates radio signals using nothing but electricity and circuit boards?
Your CPU produces radio frequency radiation at the clock speed; the electrons are oscillating in the metal circuit tracks at that rate. Old KHz speed processors (like the 6502 and Z80) were not too much of a problem as they produced longer wavelength radiation that has less ionising power. But as CPUs increased to MHz speeds it became more of a problem - creating a true 100MHz bus was a tough nut to crack because of the quantum effects on electron up/down spin cycles that the 90 degree turns in the circuit tracks put on the electrons at that frequency. Also, CPUs started producing radio signals that interfered with their own peripherals and even monitors. I used to have to wrap my external 5.25" floppy drive in foil and put a sheet between my CPU and my monitor.
Nowadays we have GHz processors that are emitting the same radiation that you use to cook your TV Dinners.
Yes the levels are a lot lower than your oven. You'll notice that Dells' plastic cases have metallic paint on the inside. This is called shielding.
Security-wise the signals produced by your CPU and montior can be read by apparatus using a directional receiving dish. Its a common form of industrial espionage.
I'm pretty sure it's not too much of a health risk, but I was just wondering if modders too any precautions.
\\'
now everything through which a current flows, produces a em field. also the cpu swiches works with "on" and "off" (i.e. someties electricity flows, sometimes it doesnt). therefore you could infact could say that it produces high frequency em radiation. agreed up to here.
but when it comes to harmfulness/readeability it is important how much energy the waves have. now my cpu can use up to ~90W (TDP). but only a very minute amout of this goes into radiation. i'm sure that you can measure this very nicely in lab conditions but in real life with the mobo, ram, grafics card (same thing pretty much), case lights (like UV unes), the hard disk (which has a motor in it!), fans (motors!), and a psu (which creates more em than anything around it) the signal of the cpu wont be measureable unless you are practically on it, seeing as the other components produce way more radiation that is sure to interfere with your measurement. but then my mobile phone, wifi, etc. pump out way more energy so where is the problem.
as for interference with other electronics: i have never seen any noticable interference produced by my pc affect my other electronics (and hell, i have loads lying around).
as for espionage, i'm sure that you can spy on people if you put a sensor for example on the monitor cable, but not if you are in the next building. also i'd like to see someone try isolatibng the waves sent out by the cpu from all the other waves that are mangeled with it
i.e. its just not necessary to shield you pc, unless we arent talking pysics but esotherics.
once upon a midnight dreary, while i pron surfed, weak and weary, over many a strange and spurious site of ' hot xxx galore'. While i clicked my fav'rite bookmark, suddenly there came a warning, and my heart was filled with mourning, mourning for my dear amour, " 'Tis not possible!", i muttered, " give me back my free hardcore!"..... quoth the server, 404.
come on guys this topic is about my casemod and my motherpanty's that prevent dust comming in to my case . not radiation of mobilephone's, monitors and microwaves....
I'll give the security-guy one point: A CRT monitor does produce sufficient energy that using the right equipment one can (in a lab anyhow) read what is on the screen (blurry!) through a wall. Not the CPU however, in anything I have read/seen verified results of. The CPU is far too small of a source, and thanks to multi-threading, it would be horrendously difficult to decode any kind of results. And an LCD screen cannot be read either.
Oh, and in the test results I saw, a pic of Bea Arthur could have been mistaken for Pam Anderson. It wasn't clear at all.
Finally, I really don't care if someone wants to try and see my porn collection. I call my computer a "porn box" for a reason.
Oh, and in the test results I saw, a pic of Bea Arthur could have been mistaken for Pam Anderson. It wasn't clear at all.
Finally, I really don't care if someone wants to try and see my porn collection. I call my computer a "porn box" for a reason.