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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Good Afternoon, Doctor (Bonneau?),
Even though I have a research project of my own that I would like to propose but only if it were vaster larger than it is right now, I do have something I need to bring to your attention. Perhaps, I am muddying the waters here but I don’t think so. My local general guru for computers—this is his fulltime vocation with a major office supply chain and he has a degree in computer science—nearly flipped his gourd when I told me I was involved in a computer-grid, for he knows that I treat my computer with exceptionally loving care. In short, he was very much against my participation—especially when I mentioned 24/7 running. “Why donate the life of your computer to them?” he responded. “Computers today are very fragile because of our pushing chip-technology to the wall. Heat in the chips is a big issue but also, there are only a certain number of hours of running time engineered into your power supply. “It used to be the geeky and completely correct thing to leave your computer on 24/7, but not anymore. They’ve solved the internal surge issues that the geeks were avoiding by not turning their computers on and off. But now, you run the risk of fluctuating current as well as surges from outside your computer because of how fragile they’ve become. That wasn’t a particular issue 10 years ago. It is now.” I told him I not only had top-quality surge protection built into a battery-backup unit I use as my power protection but that I am inside a LAN with all its own surge and power protection. “Is your battery-backup AVR-rated?” he asked and I told him it was. (AVR: Automatic Voltage Regulation) He was satisfied with that and then returned to my “donating” my computer to the grid-owners and their project from the perspective of the number of hours engineered into my power supply unit and that I was still definitely degrading my motherboard as well as the CPU, itself, by running 24/7. “What about this throttle they now have?” I asked. “It slows everything down, including your own projects’ response times, doesn’t it?” he asked, and I admitted that was what is stated in the forums. “You can’t give them a free ride, Jim,” he said. “They are costing you a part of the life of your computer no matter how you look at it.” Being a journalist by nature, I double-checked the guru’s statements and he is correct all the way. Computers are more fragile today. They should not be left on 24/7 as in the “old days”. They are very heat-sensitive. And the weak link for PCs today is the power supply units in them. These units have only a certain number of hours engineered into them and they are very expensive to replace—about half the price of the original computer, not counting labor and handling if shipments to a depot are required. And it remains that even if WCG is a very low processing demander (my meters indicate otherwise—at least 30 percent of my CPU when everything else my PC was doing totaled about 50 percent) and a person accepts the idea that the throttle also slows down his/her own work, it remains that WCG is absorbing some of the lifespan of the volunteers’ computers. So, finally, I get to the point of all this verbage. I DO NOT see a warning to this effect in the front-end promotional pages of this website. I think that is being less than honest with WCG’s good-spirited but computer-naïve volunteers. --Here’s an example of the issue I raise here. I recently saw some fellow being enthused-over in his group for achieving one-million points. I did a rough calculation on that number. It meant that he ran his computer 24/7 for about 14 months. That’s a lot of power-supply usage and most of that time was without the CPU-throttle now available and which, incidentially, I was advised to not install as I didn’t need it, that WCG was so low a processing demander and always ran in the background that I was unnecessarily concerned. It now appears very very likely that this advice is not only incorrect but also highly misleading—unintentionally, I’m sure—but misleading, nonetheless. I suspect that the gentleman being praised by his group hasn’t realized that his one-million-point achievement represents a sizable part of his PC’s lifespan. I’m a heavy PC-user and I noted that your “hours” report for me during a 31-hour/HP2 run that spanned a full day and parts of the preceding and succeeding days was 20 hours. That means that despite my concentrated industrialness, I actually used my PC only four hours out of 24 that day. Is it ethical to not reveal all the trade-offs on the front-end, even with a most-worthy purpose involved of cutting-edge medical research? I think not. By right of my being an amateur scientist in my own research areas, I believe that I could not allow a research project to continue that placed living beings at such a risk as I have discussed here without full disclosure of the facts prior to inserting them into the research process. I hope all readers will read this lengthy posting for comprehension prior to responding, and I further hope that this message will be forwarded in its entirety to the WCG directors for their professional consideration since it has a direct bearing on the entire project as well as their research methodology and their moral and ethical codes. And I’m sorry for potentially poking sticks in your spokes here in plain view of the public but I have no other means of writing any of you at the senior levels. Jim Liddell |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
That's totally wrong. Your expert seems to know very little, and you have given him inaccurate information to draw his conclusions from.
----------------------------------------Computers are in no way time-limited. Nor does running them constantly damage them in any way. Excessive heat can reduce computer lifespan, which is why it is important to keep your computer in good order and your fans working properly. The throttle does not affect your other applications, it only limits WCG. And just to be quite, quite clear - I have degree in Computing Science (first class honours) and the people running the grid have even better qualifications than that. You get full marks for your scepticism, but in this case it is entirely misplaced. Your computer is perfectly safe, even if you chose to run it 24/7 (and WCG don't ask you to do that, only to run the grid during your normal computer use, in order to save energy). "drink deep, or taste not the Pierian spring" - Pope [Edit 1 times, last edit by Former Member at Jul 9, 2006 5:30:49 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
The answer to this one is pretty easy.
1. Buy dell. Their powersupply's have been tested to not die on you like EVERY other generic out there. And it's not physically possible to pay less and get better. They're selling 2.53ghz celeron 533 bus, with monitor, mouse, keyboard 80gig HD, Cdrom, 256megs ram, windows, for $299 and no interest till 2007 if you like!!!!!!!!!!!! Oh yeah, 1 year warranty and the computer is as close to silent as you can get (because they use oversized heatsinks with shrowds and large fans that spin variable to temperature) While at 100 percent cpu, it will be more audible. 2. If you buy dell, you will NOT have a problem with cpu's or powersupplys or hd's or ram basically ever. I'm currently ranked #860 or so in results returned. If you're worried about money, multiply your cost per a kilowatt hour vs about 100 watts I'd guess, because I'd guess that 100 percent cpu causes your computer to draw about 100 watts more than idle. That is a pure guess, you can find exact numbers I am sure. Yeah, depending on the processor that number is probably very wrong. That's your real cost. |
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
Jim, I'm sorry, but your guru should find an other vocation or seek a serious update on current knowledge.
----------------------------------------My PC is well over 4 years old, well beyond business life expectancy and is and has been on 24/7 99,9999999% of the time since installation. The throttle only slows down the Science. Absolutely not the other APPS fore- or back-ground....very few exceptions during a result transmission....2 /3 minutes a day. .....if any business would be concerned, it would have to be the megawatts of energy the grid consumes world wide, but then who would progress the science in the fastlane? I'll be crunching along feeling totally comfortable as i was before. ![]()
WCG
----------------------------------------Please help to make the Forums an enjoyable experience for All! [Edit 1 times, last edit by Sekerob at Jul 9, 2006 5:35:34 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Yes indeed - and with schools and universities running grid software, in the 24 hour computer labs the machines never cool down. I think they know what they're doing. :-)
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
By the way, with like 300,000 members, and countless more installations, If this was breaking peoples computers, you'd hear about it, and you'd hear about it loud. It's just not the case.
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
"It's not what you don't know that will hurt you, it's what you do know that isn't so." Power supply lifetime! . . . Counting down a limited life time until the power supply dies! !?! There ARE a lot of issues involving power supplies, but I can only think that your guru has misunderstood something. The only thing that I can think of that matches up with your guru's 'facts' is the electro-migration of material in the chips, which is guaranteed to cause problems when combined with heat issues over a period of decades. If you intend to pass your computer down to your son and grandson, this becomes a real issue. Aside from this, a good computer can last a long time. The parts most vulnerable to wear and tear are the drives, and these are the parts that are being obsoleted quickly now, as capacities soar and prices drop and people get used to storing multi-gigabytes of video and audio data on them.
Lawrence |
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davidhobbs
Senior Cruncher England Joined: Dec 30, 2004 Post Count: 151 Status: Offline Project Badges: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
It's an ill wind.....
Cruncher JimLiddell has just given me a wonderful commercial idea: If he believes a replacement power supply unit is approximately half the cost of a new computer I am prepared to sell him as many as he wants for only a third of the price of a new computer! David. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I have four obsolete computers in working order (The oldest a Mac Classic), and when I heard that my Internet provider no longer would pay "Norton anti-virus" for protection of Windows 98 on my newest IBM and I at the same time saw a television show on Norwegian Public TV (NRK) describing WCG. I decided to become a cruncher. I bought an Acer because that was what my nearest, best, and least expensive repairman sold. If you have been a tourist to Norway you should know the Lysefjord and the Pulpit Rock (Preikestolen). Well its beautiful scenery, but boy can we have lightnings and thunder, and since I live in the foothills of the Lysefjorden massive my last computer was burned out twice by lightning, ICs on the communication board with literally burned hole through. My repairman fixed it for less than 100 bucks and that is not expensive in this country. A fifth of what I paid as my part on another occasion when it was handled by an Insurance Company. I've served you enough BS.
Point is: I turned the new computer on and I want to see if it is worn out before it is obsolete. I sleep in the very room so I turn it off most nights. |
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Viktors
Former World Community Grid Tech Joined: Sep 20, 2004 Post Count: 653 Status: Offline Project Badges: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
I did some quick power measurements on my fairly loaded (2ghz, 2gb,...) Thinkpad T42p with the battery removed. I did not calibrate my instruments against any standard and I don't know how accurate the RMS measurements are, but I don't think they are way off, although they might read slightly higher than they really are because my power brick supplies up to 72 watts to the Thinkpad. Since I am measuring power going into the brick, I am including the inefficiency of the power brick. I'll have to make more careful measurements some other time. Furthermore, different PC's and laptops may have different power consumption values.
----------------------------------------Agent running 100% CPU - 70.5 watts Agent running 60% CPU - 53.7 watts Agent snoozed, ~0% CPU - 50.2 watts So you see that on my machine the power usage is not linear and in fact, it starts to climb faster (more watts per cpu %) starting around 80%. So, at 60% CPU utilization, which is the new throttle default for World Community Grid, about 3.5 extra watts are consumed on my machine. About 20.3 extra watts are consumed running the agent at 100% CPU. By the way, the throttle does NOT slow down your other applications... only the grid work. If I run some other application which gets my cpu going at 100%, then about 70.5 watts total power consumption would be expected from that too (on my machine). Watts are a measure of the rate of consumption of energy. Watt-hours and Kilowatt-hours (kwh) are a measure of energy. If you run a 1 watt light bulb for 1000 hours, it uses the same energy as a 1000 watt hair dryer does in one hour, in this case both used one "kilowatt-hour". Incidentally, one US gallon of gasoline supposedly contains about 33.7 kilowatt-hours of energy (8.9 kwh in one liter of gasoline). A car uses about one third of the energy in gasoline to actually move the car with the rest going out in heat. Where I live, electricity costs me a maximum of $0.1422 per kilowatt hour (kwh). The rate is cheaper if my total monthly usage is below certain levels. That means that if I use 1 watt for 1000 hours (or 1000 watts for one hour), it will cost me a little more than 14 cents. About 3 kwh ($0.42) of the energy in liter of gasoline will go to moving my car about 6 miles or 10km. A whole year is about 8766 hours. So, 1 watt of extra energy use for a year, where I live, costs me a maximum of $1.25. This means that if I leave my Thinkpad on 24/7 for the whole year anyway, for reasons other than running World Community Grid, the extra energy consumed running the grid agent at the 60% CPU throttle mark will cost me about $4.37 for the whole year running 24/7. At 100% CPU, it would cost me at most $25.38 extra for the whole year running 24/7. We don't ask people to leave there PC's on 24/7 and thus the extra cost is quite low, especially at the default CPU throttle setting. Most of the electricity that goes into my Thinkpad is paid by me and I choose to pay the few cents per day extra in the hope that scientists will help find some cure or improvement in the human and world condition sometime in the future. This might just help cure some nasty disease I get 10 or 20 years from now. [Edit 2 times, last edit by Viktors at Jul 9, 2006 9:52:18 PM] |
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