The Peltiers we tested in the lab needed the same amount of electrical power as the amount of heat they moved..So much better than 5 %, but it doubles the thermal load on your heatsink.
I realize you are just joking, but for those who might think you are serious, a liquid metal system has to operate at temperatures that melt the metal.
So while great for nuclear reactors, the minimum operating temp would already destroy anything in the PC..
The only common item that uses metal cooling is hollow stemmed engine exhaust valves, which have sodium metal sealed inside. As the valve moves, the sodium splashes back and forth, moving heat from the head to the stem on the valve.
If I were to spring for expensive water cooling for my computer, I might as well get a nice air conditioning system. Sometimes my body overheats faster than my system...
You would probably be better off..
the heat transfer equation H=h*a*(delta T)
H=heat
h=heat transfer coefficient
a=surface area available for cooling
delta T=diff between temperature of device to be cooled and surrounding cooling fluid
shows that the easiest way to cool something is to reduce the temperature of the fluid that cools it..
If you lower the air temp in your computer case by 10c, the processer temp drops by 10c, assuming the fans all stay at the same speed.
Increasing "a" is limited by fin efficiency (which is what these water cooling systems are trying to get around, but a sealed evaporator/condenser would be smaller and more efficient, there is a metric buttload of patents now on sealed passive boilers/condensers), and as air speed increases, "h" rises less and less in proportion)
If you want more info, look at the free download of the heat transfer textbook I list in my journal.
OK, so water is cheap, but why not go for materials with better cooling properties (like in a fridge), which would be more efficient?
Something that is non-destructive to PCBs if it leaks would also be a bonus.
Water has excellent heat transfer properties, (better than the refrigrants in your fridge), is easy to handle, unlike some of the better heat transfer fluids such as liquid metals, and is non toxic.
If you want to immerse your computer, Flourinert has been around forever, though now probably banned.
The hardest part will be collecting the data for the air/fuel map.
You need to get data from an existing vehicle with the engine you want to use, and collect the data on what the fuel injector pulse width is for different values of engine temperature, inlet air temp, manifold ambient pressure, engine rpm, and possibly throttle position. When the engine is running and hot, you can go into closed loop mode and correct your map with the oxygen sensor data.
I think you'd have more luck using an atmel mega then using a pc..plus you would learn how to program imbedded systems..
I dunno about you, but I don't *need* my ipod, cell phone, or laptop... and a 1 bedroom apartment and a smaller vehicle would probably cost me less and be just enough to get me by... but if one is willing and able to plunk down the cash for a little more? Why not?
Just to adress the very last part of your post, in all seriousness.
Why not spend more?
As long as you have zero high interest debt (credit cards, car loans), are building equity in real estate, and have a positive
savings rate every month, then by all means spend more.
Unfortunately, a lot of people carry lots of debt and pay a lot of interest on it. Due to the clever or vicious, (depending on your point of view) way compound interest works, many people cannot escape their debt, as the interest increases to absorb their ability to pay off the principal balance.
If you do the math, and no-one does becuase it is very boring and depressing, you will find out that every new dollar you spend costs you 1.20 a year,
just waving my hands (i'm not spending the time to do the calculation).
The end result is that many people end up spending far more and getting far less becuase they choose not to delay "spending a few extra bucks" untill AFTER they have cleared all their interest debt.
To summarize very simply, money you spend on credit card interest is
just thrown away. Even tax decutible interest just offsets your income, you do not get to deduct the 3000 you spent in home morgatge interest off the the "PAY US" line on the bottom of you tax form.
Further, money spent on rent is also essentially lost. A property owner builds equity, takes advantage of property value increases, is his own master, etc. etc.
A renter can only wait for the landlord to raise the rent.
I fully grant you that ipods are insanely cool. Next year, some new insanely cool item will come out. Just renember that an ipod deferred will buy you 2 ipods next year.
Actually, it's the height of arrogance and intellectual elitism to think that all of us are obligated to submit to the blaring nonsense, paid for by commercials, which spews from TVs that have been attached, like barnacles, all over the public landscape.
The violence of your reply makes it clear that you and your TV have a closer relationship than you do with people.
You are in TOTAL control of what you perceive and your reaction to what you perceive. America (I assume the author is a member of the growing American victim class) has become a bunch of spineless victims that can't live in a world unless it caters to their total lack of impulse control.
That sounds fair.
Mind telling me where you work? I want to come by your office with a dead carp, and periodically slap you in the face with it. If you complain or react, I'll point out that you are a spineless victim that can't live in a world unless it caters to your total lack of impulse control.
At the Genoa G8 summit in 2001, the Italian police shot a protester dead
You mean that ninja-black-mask-wearing thug maroon who was bashing in the windows of their landrover with a fire extiguisher?
And shooting his stupid ass was bad why?
People like that give all protesters a bad name by association. Peaceful protest is a valuable activity to keep social balance. Violent thugs despoil and pollute the sanctity of peaceful protest.
Hell, if you tried to bash in someones car windows in Texas, people would pull over and gather around just to cap your dumb ass.
Using the police and courts to outsource your violence just puts more of a load on an already overburdened public service system.
All responsible citizens equip their home with a
trap gun
, saving time and money, although admittedly needing to use the wet-dry vac when you return home. As the description of this fine item states, trap guns were developed by the English to deal with pesky poachers and grave robbers.
The Supreme Court handed Internet services providers and privacy advocates a crucial victory yesterday when it decided to pass on an important Internet piracy case. . ..
"The recording industry may not agree, but the U.S. Supreme Court thinks personal privacy is far more important that music piracy," Red Herring reported. "On Tuesday, the high court refused to entertain an appeal of a unanimous 2003 decision by the District of Columbia Court of Appeals that held that copyright holders cannot force Internet providers to identify file sharers using a mere subpoena.
Industry watchers see this as yet another blow that the recording industry has taken in its fight against online file sharing -- a fight it is slowly losing. The lawsuits in question were between New York's Verizon Internet Services and the Recording Industry Association of America (RIAA), headquartered in Washington, D.C."
"In 1992 the FCC fined Infinity Broadcasting $600,000 after Stern discussed masturbating to a picture of Aunt Jemima."
"Is that better or worse than asking a Nigerian woman if she eats monkeys, or hosting a discussion of whether, when you have sex with a black woman, it smells like watermelons? I guess you can argue that point, but I'd be a lot more impressed with Stern's defenders if they'd quote these comments verbatim in the process of defending him."
Perhaps someday, you will be able to reach deep, deep down and find your inner adult.
Until then, do you feel that a naked person smeared with excrement and buggering a dead muskrat in public counts as Art, and should be protected as Speech? How about if the Artist writes poems on the muskrat's genetalia with a soldering iron?
That's all speech, right, and deserves to be protected?
I mean, I'm sure the people who wrote the bill of rights and the constitution wanted to make sure that muskrat-buggering soldering-ironers were protected from narrow minded repression by the sheeple of the future.
No, you usually have to turn the key one extra
position off for the steering to lock.
And in any case, if the steering should lock, you can turn the key again to free it after the engine has died, about 5 seconds. The engine will not restart in neutral or with an automatic transmission.
You can even repeatedly turn the key on and off to control your average speed.
Re:Better drivers and licensing please
on
Linux GPU Performance
·
· Score: 1, Insightful
90%+ of the market is Windows. To support your 10% slice of the market is vastly more expensive per sale.
WTF ?
Here, let's try your logic again:
"90 % of otters eat clams, so the care and feeding of wombats is more expensive."
By definition, the Linux user is "out there" on the cutting edge. Following your example, *I* will now make an unsubstantiated assertion:
80% of the 90% of computer users that use windows don't know what a video card is, could care even less, and use their computer to sell Hummel figurines on Ebay.
These users do not need or want a fast video card.
Of the linux users, the vast majority are computer literate, interested in the performance of their system, and far more likely to pay top dollar to get a FAST video card.
Makes perfect sense to cater to people who make up 60% of your market for high profit, latest generation video cards.
Hey, I'm glad to help you in your quest to make my possesions yours.
I'm usually out by myself late at night, and at 5 foot 5 and 159 lbs, with a heavy limp and a cane due to a hip injury from a motorcycle accident, kind of weak and brittle. Along with a few hundred bucks, some credit cards, spare key, and other misc valuables, don't forget to try to get hold the contents of my shorty when you come to mug me.
That's actually the whole point of pair programming. It's supposed to slow you down so you make fewer mistakes.
Um, couldn't I just type with one hand tied behind my back?
People either know what they are doing, or they don't. A system which siameses two people to do the job of one sounds like the latest "Managment Consultant" speak,
as well as a way to sidestep the issue that some of
the people can't do the job.
Teamwork is for Horses. More can be accomplished by having fewer people exerting individual effort, with managers who act to remove senseless roadblocks, provide a clear specification, and stick to it.
The projects that are doomed have a cast of millions who spend most of their time arguing whos job it is to polish the halter and oil the harness. The amount of *REAL* work available for each person is
too small, and people find other, pointless things to do in order to justify their existance wasting their own time and that of many others.
Note to spelling socialists: English is not my native language, so I always welcome pointless corrections on spelling.
Because we all know there is no
Liberal Bias, the only possible bias can be conservative!
By Lenin, it is all so simple, cannot you fools see it?
[The preceeding was a rhetorical question. After the revolution, your answer will be checked to see if it conforms to "socialist civilized norms", and those in need of re-education will be sent to mine uranium in the "re-education" camps.
Microsoft argues that open source freezes innovation, and Krumholtz says that commercial software alone spurs economic growth and creates jobs.
Fact is, these "jobs" are ones that do
not need doing.
If "open source" provides needed software at lower cost, everyone (and I am looking at you, large wasteful government) should be using it.
The "jobs" and "economic growth" should be used to create software which is not available thru "open source"
Society is not better off when people do un-needed work, or pay more then necessary for goods and service.
"But it's *my* job at risk" I hear you whine.
Too farking bad.
Do you remember when ball point pens first came out, and they cost $25? Do you think the craftsmen who made those are still getting paid the same amount to make pens today that wholsale for 20 cents? Where were you when buggy whip makers went bust because people drove cars?
You are buying only made in USA computer parts, right?
I mean, you would never buy parts made in other countries, because that would mean that US workers would lose their jobs just so you can buy a PC for less than $6000.
Fortunately, some of us understand that $money$ is not the most
important thing in the world, and would not actually prostitute themselves, regardless of the price.
Bemused pity is the appropriate feeling for those whose sense of self worth and identity are so weak that they are just waiting for a chance to become a whore.
So someone steals your PC, and all your data is gone.
You have backups, right? [Sounds of repressed
snorting and manical laughter here].
A better solution might be to seperate the disks from the computer. After all, your hardware value drops 50% a year (wild assed guess), so the loss of hardware is sort of inconsequential (except for that
Sony Monitor
).
Your data is really what you care about. New hardware comes from Newegg.
So why not seperate the disks from the system.
Using
FiberChannel
, you can bury the disks in a waterproof cavern under the fake outhouse behind the barn.
Only a cable connects your disks to the PC, and no casual thief is going to even know what a fiberchannel cable looks like, much less go
looking for where the other end goes.
The downside is the cost, of course, but the upside is that very few people are going to be able to steal your data by carting away your system before you can recover it, or whatever you need to do with it.
Slashdot Mirror
The Peltiers we tested in the lab needed the same amount of electrical power as the amount of heat they moved..So much better than 5 %, but it doubles the thermal load on your heatsink.
So while great for nuclear reactors, the minimum operating temp would already destroy anything in the PC..
The only common item that uses metal cooling is hollow stemmed engine exhaust valves, which have sodium metal sealed inside. As the valve moves, the sodium splashes back and forth, moving heat from the head to the stem on the valve.
You would probably be better off..
the heat transfer equation H=h*a*(delta T)
H=heat
h=heat transfer coefficient
a=surface area available for cooling
delta T=diff between temperature of device to be cooled and surrounding cooling fluid
shows that the easiest way to cool something is to reduce the temperature of the fluid that cools it..
If you lower the air temp in your computer case by 10c, the processer temp drops by 10c, assuming the fans all stay at the same speed.
Increasing "a" is limited by fin efficiency (which is what these water cooling systems are trying to get around, but a sealed evaporator/condenser would be smaller and more efficient, there is a metric buttload of patents now on sealed passive boilers/condensers), and as air speed increases, "h" rises less and less in proportion)
If you want more info, look at the free download of the heat transfer textbook I list in my journal.
Water has excellent heat transfer properties, (better than the refrigrants in your fridge), is easy to handle, unlike some of the better heat transfer fluids such as liquid metals, and is non toxic.
If you want to immerse your computer, Flourinert has been around forever, though now probably banned.
You need to get data from an existing vehicle with the engine you want to use, and collect the data on what the fuel injector pulse width is for different values of engine temperature, inlet air temp, manifold ambient pressure, engine rpm, and possibly throttle position. When the engine is running and hot, you can go into closed loop mode and correct your map with the oxygen sensor data.
I think you'd have more luck using an atmel mega then using a pc..plus you would learn how to program imbedded systems..
Just to adress the very last part of your post, in all seriousness.
Why not spend more?
As long as you have zero high interest debt (credit cards, car loans), are building equity in real estate, and have a positive savings rate every month, then by all means spend more.
Unfortunately, a lot of people carry lots of debt and pay a lot of interest on it. Due to the clever or vicious, (depending on your point of view) way compound interest works, many people cannot escape their debt, as the interest increases to absorb their ability to pay off the principal balance.
If you do the math, and no-one does becuase it is very boring and depressing, you will find out that every new dollar you spend costs you 1.20 a year, just waving my hands (i'm not spending the time to do the calculation).
The end result is that many people end up spending far more and getting far less becuase they choose not to delay "spending a few extra bucks" untill AFTER they have cleared all their interest debt.
To summarize very simply, money you spend on credit card interest is just thrown away. Even tax decutible interest just offsets your income, you do not get to deduct the 3000 you spent in home morgatge interest off the the "PAY US" line on the bottom of you tax form.
Further, money spent on rent is also essentially lost. A property owner builds equity, takes advantage of property value increases, is his own master, etc. etc.
A renter can only wait for the landlord to raise the rent.
I fully grant you that ipods are insanely cool. Next year, some new insanely cool item will come out. Just renember that an ipod deferred will buy you 2 ipods next year.
The violence of your reply makes it clear that you and your TV have a closer relationship than you do with people.
I suggest you turn it off and get out more.
Or do just the wants and "rights" of the TV addicts count?
Think of it as a social service, like picking up litter, preventing pollution, defending old ladies from muggers, helping ducks cross the street.
If you saw some beating a dog that was not yours, not on your property, would you say you have no right to interfere?
The violent and reactive responses of the pro-tv people on this thread show that waaay too many people need to relax and get away from their tv.
That sounds fair.
Mind telling me where you work? I want to come by your office with a dead carp, and periodically slap you in the face with it. If you complain or react, I'll point out that you are a spineless victim that can't live in a world unless it caters to your total lack of impulse control.
Looking forward to your reply!
You mean that ninja-black-mask-wearing thug maroon who was bashing in the windows of their landrover with a fire extiguisher?
And shooting his stupid ass was bad why?
People like that give all protesters a bad name by association. Peaceful protest is a valuable activity to keep social balance. Violent thugs despoil and pollute the sanctity of peaceful protest.
Hell, if you tried to bash in someones car windows in Texas, people would pull over and gather around just to cap your dumb ass.
Stop whining.
All responsible citizens equip their home with a trap gun , saving time and money, although admittedly needing to use the wet-dry vac when you return home. As the description of this fine item states, trap guns were developed by the English to deal with pesky poachers and grave robbers.
"The recording industry may not agree, but the U.S. Supreme Court thinks personal privacy is far more important that music piracy," Red Herring reported. "On Tuesday, the high court refused to entertain an appeal of a unanimous 2003 decision by the District of Columbia Court of Appeals that held that copyright holders cannot force Internet providers to identify file sharers using a mere subpoena.
Industry watchers see this as yet another blow that the recording industry has taken in its fight against online file sharing -- a fight it is slowly losing. The lawsuits in question were between New York's Verizon Internet Services and the Recording Industry Association of America (RIAA), headquartered in Washington, D.C."
From instapundit.com 5 minutes ago, of course. :)
Oh, RF signals are owned, all right, just not by citizens.
Ask any of the people who got sued by direct tv for buying smartcard programmers.
You just don't have the money needed to purchase the appropriate law.
"In 1992 the FCC fined Infinity Broadcasting $600,000 after Stern discussed masturbating to a picture of Aunt Jemima."
"Is that better or worse than asking a Nigerian woman if she eats monkeys, or hosting a discussion of whether, when you have sex with a black woman, it smells like watermelons? I guess you can argue that point, but I'd be a lot more impressed with Stern's defenders if they'd quote these comments verbatim in the process of defending him."
Perhaps someday, you will be able to reach deep, deep down and find your inner adult.
Until then, do you feel that a naked person smeared with excrement and buggering a dead muskrat in public counts as Art, and should be protected as Speech? How about if the Artist writes poems on the muskrat's genetalia with a soldering iron?
That's all speech, right, and deserves to be protected?
I mean, I'm sure the people who wrote the bill of rights and the constitution wanted to make sure that muskrat-buggering soldering-ironers were protected from narrow minded repression by the sheeple of the future.
/sarcasm
And in any case, if the steering should lock, you can turn the key again to free it after the engine has died, about 5 seconds. The engine will not restart in neutral or with an automatic transmission.
You can even repeatedly turn the key on and off to control your average speed.
WTF ?
Here, let's try your logic again:
"90 % of otters eat clams, so the care and feeding of wombats is more expensive."
By definition, the Linux user is "out there" on the cutting edge. Following your example, *I* will now make an unsubstantiated assertion:
80% of the 90% of computer users that use windows don't know what a video card is, could care even less, and use their computer to sell Hummel figurines on Ebay.
These users do not need or want a fast video card.
Of the linux users, the vast majority are computer literate, interested in the performance of their system, and far more likely to pay top dollar to get a FAST video card.
Makes perfect sense to cater to people who make up 60% of your market for high profit, latest generation video cards.
I'm usually out by myself late at night, and at 5 foot 5 and 159 lbs, with a heavy limp and a cane due to a hip injury from a motorcycle accident, kind of weak and brittle. Along with a few hundred bucks, some credit cards, spare key, and other misc valuables, don't forget to try to get hold the contents of my shorty when you come to mug me.
8^)
Move your stuff out to a storage unit. Any search will be only of the house you are in, not an external storage unit.
Um, couldn't I just type with one hand tied behind my back?
People either know what they are doing, or they don't. A system which siameses two people to do the job of one sounds like the latest "Managment Consultant" speak, as well as a way to sidestep the issue that some of the people can't do the job.
Teamwork is for Horses. More can be accomplished by having fewer people exerting individual effort, with managers who act to remove senseless roadblocks, provide a clear specification, and stick to it.
The projects that are doomed have a cast of millions who spend most of their time arguing whos job it is to polish the halter and oil the harness. The amount of *REAL* work available for each person is too small, and people find other, pointless things to do in order to justify their existance wasting their own time and that of many others.
Note to spelling socialists: English is not my native language, so I always welcome pointless corrections on spelling.
That is all.
By Lenin, it is all so simple, cannot you fools see it?
[The preceeding was a rhetorical question. After the revolution, your answer will be checked to see if it conforms to "socialist civilized norms", and those in need of re-education will be sent to mine uranium in the "re-education" camps.
That is all.
Fact is, these "jobs" are ones that do not need doing.
If "open source" provides needed software at lower cost, everyone (and I am looking at you, large wasteful government) should be using it.
The "jobs" and "economic growth" should be used to create software which is not available thru "open source"
Society is not better off when people do un-needed work, or pay more then necessary for goods and service.
"But it's *my* job at risk" I hear you whine.
Too farking bad. Do you remember when ball point pens first came out, and they cost $25? Do you think the craftsmen who made those are still getting paid the same amount to make pens today that wholsale for 20 cents? Where were you when buggy whip makers went bust because people drove cars?
You are buying only made in USA computer parts, right? I mean, you would never buy parts made in other countries, because that would mean that US workers would lose their jobs just so you can buy a PC for less than $6000.
And that would just be UNFAIR!
Noted.
Fortunately, some of us understand that $money$ is not the most important thing in the world, and would not actually prostitute themselves, regardless of the price.
Bemused pity is the appropriate feeling for those whose sense of self worth and identity are so weak that they are just waiting for a chance to become a whore.
You have backups, right? [Sounds of repressed snorting and manical laughter here].
A better solution might be to seperate the disks from the computer. After all, your hardware value drops 50% a year (wild assed guess), so the loss of hardware is sort of inconsequential (except for that Sony Monitor ).
Your data is really what you care about. New hardware comes from Newegg.
So why not seperate the disks from the system.
Using Fiber Channel , you can bury the disks in a waterproof cavern under the fake outhouse behind the barn.
Only a cable connects your disks to the PC, and no casual thief is going to even know what a fiberchannel cable looks like, much less go looking for where the other end goes.
The downside is the cost, of course, but the upside is that very few people are going to be able to steal your data by carting away your system before you can recover it, or whatever you need to do with it.
Google for the AR-15 and the Ruger Mini 14
Read these two links:
ruger mini 14 vs ar 15
Marlin Camp 9. Scroll past the comments to the bottom till you see the pictures.
HTH HAND.