Cooling Down Hot Processors 293
DonnaMai writes "Face it: the only scorching hot thing you want with a chip is salsa. Any other overheating is potentially counterproductive, and can be downright damaging to the microprocessor -- or other components. This article uncovers potential ways to chill the chips."
Eh? (Score:4, Funny)
Because nothing says "fiesta!" quite like third-degree burns on the roof of your mouth...
Re:Eh? (Score:5, Funny)
Nope, didn't work. Roof is still tender.
Re:Eh? (Score:2, Funny)
You Insensitive Clod (Score:3, Funny)
Re:You Insensitive Clod (Score:2)
On a more serious note, I think that it's impressive that AMD has turned it around in the temperature department while still delivering great performance. The AMD64's [amd.com] kick ass when you want them to, and then scale back to be cool when you aren't running processor-intensive aps. I'm sure Transmeta or someone else thought of doing something like that before, but I think that this is where we'll see it more and mroe often.
Re:You Insensitive Clod (Score:2)
Would I save power by not running BOINC (it's like seti@home)?
Re:You Insensitive Clod (Score:2)
I thought it interesting that the recent release of details about Sonys Cell said that the chip had 10 temp sensors on board, presumably to shift processing away from areas getting too hot.
Re:You Insensitive Clod (Score:3, Interesting)
the linux kernel (and presumbaly the windows kernels as well) issue the hlt instruction when idle, which allows parts of the chip to power down, significantly reducing power and heat.
(some/all?) desktop P4s can also scale down clock cycles under software control, but that is significantly coarser grain than the hlt instruction. When it works, the hlt instruction should be sufficient to keep the cpu cool when not doing anything.
Of course, these recourses don't always work. My P4's fan is currently
Re:You Insensitive Clod (Score:2)
BTW is that sig meant to draw attention to that passage of the bible, or meant to imply that your post it a biblical quote?
Bah (Score:5, Funny)
Re:Bah (Score:2)
love,
your fried brother
p.s. Sister's pregnant again.
Re:Bah (Score:2)
For those who don't get the reference, Bill Cosby has a story about how he used to bathe in the toilet as a child. But he found that the water was too cold so he'd use his little brother Russell to warm up the water.
Of course, I could be completely wrong and this might have nothing to do with that bit.
cool chips (Score:5, Interesting)
Re:cool chips (Score:5, Informative)
Re:cool chips (Score:2)
Dan East
Re:cool chips (Score:3, Informative)
Re:cool chips (Score:2)
They actually have very small difference between idle and loaded.
This is the newer socket 939.
Re:cool chips (Score:2)
Re:cool chips (Score:3, Informative)
Re:cool chips (Score:2)
that's not what engineers do! (Score:2)
Re:cool chips (Score:5, Interesting)
Re:cool chips (Score:5, Insightful)
If applications were coded as if there were actual restrictions, if speed and efficency were a consideration, then this would be a valid option. 90% of the processing power in a computer would only be used when playing a game.
Sadly, we live in a world where the OPERATING SYSTEM will soon require a 3D card to even function. (Windows Longhorn)
The bottom line is, despite significant advances in hardware, the "User Experience" still feels as sluggish and slow as it did in the days of Windows 3.1 on a 386. How much does XP do that the average user needs that Windows 3.1 and Word 2.0 couldn't? Can you IMAGINE how fast Windows 3.1 would be on modern hardware if the drivers existed?
Re:cool chips (Score:2)
Re:cool chips (Score:3, Informative)
And that's not even an original idea from Microsoft.
OSX 10.3 (Panther) already utilizes 3D acceleration on video cards and treats all windows as textures. That's how the nifty "expose" feature works. The first time I saw that feature it was one of those "why didn't anybody think of this before" moments. I don't even own a mac, yet... but my mini is on its way.
10.4 (Tiger) will take
Welcome to the free market (Score:2)
Re:cool chips (Score:2, Informative)
And with word 2.0 you couldn't
Re:cool chips (Score:4, Interesting)
CPUs today are bored 90% of the time. Doing word processing and stuff, your CPU use is probably below 10%. The sluggishness has almost NOTHING to do with CPU speed. The big thing is load times, which is correlated to disk usage. RAM really is virtually unlimited, and the only time I've hit the limitations of my CPU are when I'm doing things like writing programs to breed multimedia files.
If you're talking about lack of responsiveness, you sound like you don't need a faster processor... it sounds like you need a 1Ghz machine with 256 MB of decent RAM and a 10,000 RPM SATA drive. 512 MB of RAM if you surf with multiple windows and work with spreadsheets at the same time. Swear to god, that'll knock most of your lack of response time to near nothing.
~D
Re:cool chips (Score:2)
So what? Ofloading this stuff to a graphical processor is a Good Thing (TM); The CPU has less to do and interface responsiveness can improve.
The bottom line is, despite significant advances in hardware, the "User Experience" still feels as sluggish and slow as it did in the days of Windows 3.1 on a 386.
Yes, Windows feels really sluggish. If you don't have much tying yourself to Windows
Re:cool chips (Score:2)
I call BS here. For one thing, for "normal users" processor speed does not matter anymore. Any CPU made in the past 2 or 3 years is fine for most everybody. You can look at the web, read email, do office app stuff, play with your digital camera, and it will be fine.
Now look at your "power user" aka gamer, digital video/pictures, audio, or the like. These apps
Re:cool chips (Score:2)
And how is embedding a flight simulator into Excel 95 "Feature Rich?"
Re:cool chips (Score:2)
My point exactly. No one optimizes their code anymore.
Re:cool chips (Score:2)
You have to design such a system for the peaks, not just lower th entire average temperature of the chip.
Re:cool chips (Score:3, Insightful)
buy one.
but you'll still need to cool the high powered beast when you need the power, unless you would like to get some nitrous shitter that only could run full blast for 20 secs and then explode.
Re:cool chips (Score:3, Informative)
The AMD Athlon64 3500 consumes 20W of power on low load and 69W when you stress it. Most of the time it will be pretty cool.
Cool it down (Score:2, Insightful)
Re:Cool it down (Score:2)
Quite frankly, if a decent heatsink+fan isn't enough to keep your processor from overheating, you really need to get a new processor. You should spend your money on that, not on silly solutions that won't address the root cause of the problem and may or may not even work.
It's a known fact that one of the easiest ways to completely destroy your machine is to use a watercooler.
Re:Cool it down (Score:3, Interesting)
Something is broken with either your installation, motherboard, fan or air circulation in the case. My Athlong *never* goes above 50. Most of the time, it runs under 40. Stock heatsink/fan.
Your setup is messed up.
In my day.... (Score:4, Funny)
No fancy metal heat sinks for us...andd we liked it!
Move! (Score:5, Funny)
Re:Move! (Score:2)
Re:Move! (Score:2)
Re: (Score:2)
Re:Move! (Score:2)
Re:Move! (Score:2)
Just put. . . (Score:2)
Granted, you'll have to have a tank of O2 nearby, wear a mask and have on thick gloves but hey, you can't have everything.
Tsssss! (Score:5, Funny)
They don't last very long, though.
Perhaps we should be working on a better ice cube!
Re:Tsssss! (Score:3, Funny)
Solution: We all need to grow gills and move under the sea.
Razored processor architecture (Score:5, Interesting)
Re:Razored processor architecture (Score:4, Informative)
No speed reduction (Score:2)
Re:Razored processor architecture (Score:5, Informative)
Re: (Score:2)
Re:Razored processor architecture (Score:2)
Re:Razored processor architecture (Score:2)
Think of a MOSFET transistor as a door, but you can only pull on it to open it, you can't push it shut (an enhancement-type MOSFET). If you can only pull very weakly on the door to open it, you use a weaker spring to pull the door shut. At some point, the door will not shut entirely.
At 5V, the leakage current is essentially zero and can be ignored. You have no problems at 3.3 and 2.5
Re:Razored processor architecture (Score:3, Informative)
ANANDTECH ARTICLE [anandtech.com]
Power! (Score:2)
Liquid Nitrogen, of course (Score:3, Interesting)
Better than water cooling (Score:2)
I'm told it was fun to watch as the mineral oil went through the filter and was cooled by the process of falling through the air.
Don't know how long it ran before a technical problem though.
It WAS something a coworker told me a college friend had told him about.
Re:Better than water cooling (Score:5, Interesting)
Here it is in the "mostly finished" stage:
Picture 1 [adelphia.net]
Picture 2 [adelphia.net]
Re:Better than water cooling (Score:2)
Of course, you don't have the $20 aquarium filter to keep the oil in motion.
Re:Better than water cooling (Score:2)
Makes me wonder what the conductive properties of mineral oil is... especially over a long period of time where water/metals/other stuff might disolve in it...
Re:Better than water cooling (Score:3, Insightful)
Yes, but they are solvents for the plastic parts used on the MB. Over time, the plastic parts (such as slot connectors) will swell, and eventually they might break the solder joints.
The pcb itself might swell, and if it does, it will break the plated thru holes and vias between the layers in the board.
Re:Better than water cooling (Score:3, Funny)
Re:Better than water cooling (Score:2)
I like hot (Score:4, Funny)
Overheating vs. High Operating Temps (Score:4, Interesting)
There are many, many ICs that run happily for years at high operating temperatures (Blaupunkt's Digiceiver digital RF processor being one I'm familiar with).
Saying this, I do run a 12" G4 PowerBook and can appreciate the delights of a 20degC chip...
What about (Score:3, Interesting)
Cool Processors (Score:4, Insightful)
Re:Cool Processors (Score:2)
Re:Cool Processors (Score:2)
~D
Underclocking and undervolting primer (Score:3, Informative)
std. disclaimer: i am just a fan. ba dum bum.
And why was this article accepted?! (Score:5, Insightful)
There are a ton of different solutions out there both onchip and off including aircooling via different heatsink designs, watercooling, peltier cooling, and self contained refrigeration units.
This article barely scraped the surface of anything useful or interesting related to cooling.
Oh wait, this is
Re:And why was this article accepted?! (Score:2)
Re:And why was this article accepted?! (Score:2, Funny)
Ducting (Score:5, Interesting)
Re:Ducting (Score:3, Interesting)
More efficient software (Score:3, Interesting)
Re:More efficient software (Score:2)
I like my eyecandy in games, and my AI, and my physics, and don't want to go back to not having those.
Excuse my Ignorance.... (Score:3, Interesting)
I haven't taken any measurements, but i'm willing to bet that the skirting around that wouldn't be much bigger- we've got more length on all sides, so we don't have to go as deep.
However, i don't design microprocessors, and don't know anything about electronics, so i'm betting there's something i'm missing out- i.e. the impedance or capacitance effects of increasing the microscopic traces. I would assume someone has thought of this once before, but with all the rush to make stuff smaller and smaller, can it be overlooked?
It's not like we don't have any spare room in a PC case, y'know...
Re:Excuse my Ignorance.... (Score:5, Informative)
It would --- but there would be other problems.
The first one is the most simple: silicon's expensive. Really expensive. The more units you can slice off that wafer the cheaper the units are. Making the die bigger simply for thermal reasons isn't going to wash with the chip manufacturers. They already glue the die to a metal backing plate, which gives you much the same effect anyway.
The second one, however, is the most crucial one. Electricity is slow. Electrical impulses travel at about 2/3 c through copper and a touch less through silicon (IIRC, I can't find the figures to check). This means that the bigger your die is, the longer it takes the impulses to travel from one side of it to the other.
A 1GHz clock fires every 10^-9 seconds; since the speed of light is 3x10^8 m/s, this means that the impulses are going to travel about twenty centimetres between clock pulses. For a 4GHz clock, it'll be about 5cm. There's a lot more wiring than that folded up inside the die; and it gets worse --- particular things happen at particular times throughout the clock cycle, and where you are in the clock cycle now depends on how long the wire is that connects you to the clock. Making sure everything happens in sync is a nightmare.
There are solutions to all of this; asynchronous designs which don't use clocks, offloading functionality to special-purpose processors like GPUs so you don't need as fast a main processor, radically different approaches like Cell, optical transports so you can route signals through each other, etc, but basically there are loads of good reasons why you need the die to be as small as humanly possible.
Re:Excuse my Ignorance.... (Score:2)
What a disappointment (Score:5, Insightful)
Color this mechanical engineer disappointed.
Insert Witty Title Here (Score:3, Funny)
The roof, the roof, the roof is on fire!
(Or, for the Futurama fan in you, and me, Nixon: "The loot, the loot, the loot is on fire!")
Cooling chips, another idea (Score:2)
My invention is this: encase the chip in a liquid or (better) a solid that does not conduct electricity but is an excellent heat conductor. Alternatively, wrap the chip in a thin layer of insulating material and then encase the rest in a metal brick. The idea is to provide a large solid primary heat sink.
The primary heat sink
Why do we need hot processors? (Score:2)
Intel have, in fact, been pulling the blinds over our eyes with the Pentium 4 series - particularly the infamous Prescott infernace. An entire industry exists in cooling down CPUs to the point that there's more reviews of silly cooling contraptions and water cooling kits on the web than there are the bits in PCs that do useful stuff.
Why the Intel blinds? Because the Pentium M manag
Re:Why do we need hot processors? (Score:3, Informative)
They've been pushing this for so long, that they can't look back now. Yes, the Pentium M's perform great, but they're still only around 1.7 GHz.
While that out-performs P4's with MUCH higher clock-speeds, what are they going to say? Buy this CPU, it's 1.7GHz! Joe Sixpack would say "But I can buy this here Penteeyum Four with 4 GHz... 4 is better than 1.7."
AMD has been rating their CPUs on performance to keep competitive with Intel's. If anything, Intel will have t
Re:Why do we need hot processors? (Score:2)
But they ARE nice chips. Intel should re-engineer ALL of their chips to be more like the M.
Obligatory link (Score:3, Interesting)
Plagiarised again? (Score:4, Insightful)
From the Slashdot summary
and from the first paragraph of the article itselfAside from the removal of one sentence and a slight re-wording of the last, this is word for word the introduction to the article. If you were to submit this in a paper for a college (or even high school!) class, you'd be a good candidate for a plagiarism investigation.
Once again, Slashdot editors, there's a very simple way to deal with this -- change the author attribution. Rather than saying, "DonnaMai writes ...", use "DonnaMai quotes ..." or "DonnaMai poorly paraphrases ...". By properly citing the summary as a quotation or paraphrasing* of the article, you would avoid the impression of plagiarism.
* Yes, paraphrasing is allowed by fair use. In fact, if you're going to summarize an article, you want to paraphrase. However, paraphrasing is not, "Copy a sentence with a changed word here, drop a sentence there." You need to write a summarization in your own words, not take the article's words and (poorly) "massage" them so that they're not 100% identical (90% identical is still a problem).
Peak heat or sustained heat. (Score:2)
Intel Branding (Score:3, Funny)
Did you hear about the new hotness? Intel Pentium, SCORCHING PERFORMANCE! ssssssssss!
Stick a Prescott on a long stick and apply that scortching brand on the rear end of any Longhorn cattle, and you've got yourself a stampede of sales, yeeeee-haw!
#1: Make sure your fans are facing correctly. (Score:3, Insightful)
Most ATX cases like to have a fan blowing in the front, and other fans blowing out the back, check your case documentation. If one of your fans isn't working well, or is actually facing the wrong way, the entire airflow scheme goes straight to hell. I've seen this happen several times, but now that cooling is so critical incorrect fan placement is often a show-stopper.
Today's story? My buddy builds a new system with a new P4 3.4HT. It exhibits classic signs of overheating-- the fan sounds like a 747 taking off all the time, odd beeping, memory errors, and when his brother who actually built it for him runs 3DMark, it scores something like 40% of what it should have on CPU. Everest [lavalys.com]says it's running at >80C. Much freaking out is done, and they order a hardcore Thermaltake fan to replace the standard/weak one that came bundled with the processor. That comes, and it helps somewhat, so the processor isn't stepping itself down to non-melting temperatures, hanging at 65-70C full-performance. Memory errors still a bit of an issue.
So I come over to look at it. Dumbass neighbor (Best Buy Geek Squad employee/Frat Boy) had put the front fan on facing backward while assisting with the assembly, so the front 80mm case fan was blowing OUT of the case.
I unscrewed the fan, flipped it around, and two minutes later the computer was playing Far Cry and humming along at 40C, by far the quietest computer in the room.
Moral of the story? If you have a misplaced or broken fan, your cooling power drops massively. It pays to actually look at your case documentation now. Oh, and buy Antec [antec.com].
Re:Salsa (Score:2)
Re:Salsa (Score:3, Funny)
Since the [tt]ime that salsa is made with Habaneros (which aren't really peppers) that will burn a hole straight from your mouth to your ass. Considering that most people here on Slashdot don't have any real distance between those two sections of the body, I guess it doesn't mean much tho... ;P
Re:Who cares? (Score:2)
The consumer POV is useful in other aspects of your life.
You should better think, as a
If you don't, chances are you are not very much a nerd.
Re:Before the /. effect... (Score:2, Insightful)
Crap, I say!
Re:Laptops (Score:5, Interesting)
Re:Radical cooling idea (Score:2)
Don't try this! A lot of chemicals from the mobo and cables would diffuse chemicals in the pure water, and sooner than later, the water will conduct enough current.
Re:Crime and Punishment (Score:2)
No.