Register FAQ Search Today's Posts Mark Forums Read

 2009-03-15, 04:07 #1 nonxcarbonx   2·1,019 Posts New-Nervous about program I just joined gimps, and I'm just a bit nervous about using the program. I'm on a family windows xp, and I set my nighttime memory to 20mb. I'm just a bit nervous concerning power consumption cost, and if gimps will do anything bad to my computer long term, like degrade the hard drive or something along those lines. I don't know if it's bad to have CPU Usage at 100% for so long. I know my hesitation is probably unfounded, but can you reassure me?
 2009-03-15, 13:41 #2 pegaso56     Oct 2006 Rosario, Argentina 37 Posts For a new Gimper Hi. Don 't be afraid. Nothing happens to your HD, and the bill does not move a lot What you have to be conscious about is that prime95 push your hardware to the limits. I`ve been using the program for more than ten years now in differents CPUs (from 486 DX 100 MHz to Dual Core) and never, never the hardware suffers any injury, except two or three times with low cost, generic brand memory which did not pass the torture test. So i went to vendor and replaced them. to George, Scott and all the good fellows who join this forum Regards, Carlos
 2009-03-15, 17:32 #3 Prime95 P90 years forever!     Aug 2002 Yeehaw, FL 23×929 Posts You should be aware of the power costs. If, before installing the program, the computer was on all the time then it will consume an extra 40 watts or so. At my 12 cents / kwh, that is about an extra 12 cents a day. If, before installing the program, the computer was not on all the time then you can expect to consume an extra 200 watts or so -- that's about 60 cents per day. There will also be a slight increase in your air conditioning costs too (but a reduction in your heating bill).
2009-03-15, 17:38   #4
Mini-Geek
Account Deleted

"Tim Sorbera"
Aug 2006
San Antonio, TX USA

102538 Posts

Quote:
 Originally Posted by Prime95 You should be aware of the power costs. If, before installing the program, the computer was on all the time then it will consume an extra 40 watts or so. At my 12 cents / kwh, that is about an extra 12 cents a day. If, before installing the program, the computer was not on all the time then you can expect to consume an extra 200 watts or so -- that's about 60 cents per day. There will also be a slight increase in your air conditioning costs too (but a reduction in your heating bill).
Note that this all assumes that you will leave the computer on all the time once you install Prime95. By the way, 12 cents/day is $3.60 a month and 60 cents per day is$18 a month.

2009-03-15, 18:26   #5

"Richard B. Woods"
Aug 2002
Wisconsin USA

11110000011002 Posts

Quote:
 Originally Posted by nonxcarbonx I'm just a bit nervous concerning power consumption cost, and if gimps will do anything bad to my computer long term, like degrade the hard drive or something along those lines. I don't know if it's bad to have CPU Usage at 100% for so long. I know my hesitation is probably unfounded, but can you reassure me?
Let me start off with this:

None of GIMPS's software does anything that is outside the manufacturer's specifications for your computer or its components!. If your computer can't perform all the way up to its specifications, that's not GIMPS's fault -- it's just that GIMPS software may be the only thing that will expose the flaw.

Having said that:

I don't recall anyone having posted a complaint that their computer had been damaged by running GIMPS software. (Maybe it's happened, but I forgot.) All I remember is lots of folks asking questions such as yours, with none of them coming back later to report that the sort of assurances you see made by the previous posters were wrong.

I myself see a noticeable difference in my apartment temperature (comparing full 24/7 GIMPS use to having system idle for much of day or switched off), or rather, what the temperature would be if not regulated -- in the winter the furnace runs less often, but in the summer the air conditioning is on more.

There have been times in the past when some of us have claimed, basically, that GIMPS software has no noticeable effect, but someone came back to point out either:

1. It increases power consumption, by an amount that some folks consider significant.

2. It sometimes causes noticeable swapping delay as a low-priority GIMPS program is swapped out to make room for higher-priority programs. This would depend on how fully-used the system RAM normally is by other software, and whether Prime95 was doing high-memory-use Stage 2 of P-1 or ECM.

3. If one watches the (Windows) Task Manager or other system monitor, one will see constantly high CPU use by GIMPS software, so it's not "unnoticeable". (OTOH, if one refrains from watching those displays, one doesn't normally notice anything extra happening because of GIMPS software.)

I think we're more careful nowadays to point those out to newcomers.

What we _do_ see frequently are reports that when the GIMPS torture tests are run, they reveal system flaws such as memory errors, calculation errors, or overheating. But that's because the flaws are actually there whether they're detected or not, and _any_ software that exercises the hardware fully could find the same flaws.

It happens that the characteristics of GIMPS that make it good for performing certain mathematical computations also make it good for finding system flaws that might not show up when running anything else. It wasn't deliberately designed for that; that's just a side effect of the demanding nature of GIMPS's computations and the excellent optimizations by George Woltman and others for using the CPU circuitry as usefully as possible in computations. Almost no other software, aside from some games and some test programs, is optimized like that, and none of them exercise the CPU in the same pattern that GIMPS software does.

Last fiddled with by cheesehead on 2009-03-15 at 18:30

2009-03-15, 19:35   #6
xilman
Bamboozled!

"𒉺𒌌𒇷𒆷𒀭"
May 2003
Down not across

101001100111002 Posts

Quote:
 Originally Posted by Prime95 There will also be a slight increase in your air conditioning costs too (but a reduction in your heating bill).
"Air conditioning"? What does "air conditioning" mean?.

Anything that reduces my heating bill, on the other hand, has to be a good thing.

Paul

2009-03-15, 20:04   #7

"Richard B. Woods"
Aug 2002
Wisconsin USA

170148 Posts

Quote:
 Originally Posted by xilman "Air conditioning"? What does "air conditioning" mean?
Last two initials of HVAC (http://en.wikipedia.org/wiki/HVAC)

2009-03-16, 01:49   #8
Mr. P-1

Jun 2003

22218 Posts

Quote:
 Originally Posted by nonxcarbonx I set my nighttime memory to 20mb.
You need to allocate 200MB or more to do high-memory work for GIMPS.

For low memory work, the memory setting is ignored. Currently first-time tests will use about 50MB of RAM, while doublechecks use about 25MB. If this is too big a memory footprint, take factoring assignments.

2009-03-16, 01:58   #9
Mr. P-1

Jun 2003

22218 Posts

Quote:
 Originally Posted by cheesehead I don't recall anyone having posted a complaint that their computer had been damaged by running GIMPS software. (Maybe it's happened, but I forgot.)
I would consider it an extraordinary claim, requiring extraordinary evidence, that GIMPS software damaged a computer. Any fault which manifests shortly after installing or using the software is most likely to be a coincidence.

As already noted, GIMPS could impact the running stability of a less-than-rock-solid machine, or its resource use could impact upon performance. In either case, removing GIMPS will alleviate the symptoms, though not, in the first case, the underlying cause.

2009-03-16, 03:48   #10
jrk

May 2008

21078 Posts

Quote:
 Originally Posted by Mr. P-1 I would consider it an extraordinary claim, requiring extraordinary evidence, that GIMPS software damaged a computer. Any fault which manifests shortly after installing or using the software is most likely to be a coincidence.
Or an existing defect in the computer.

But since most computers anymore are equipped with thermal-protection functions (CPU shut off before it fries itself), there is little to worry about as far as actually wrecking a computer permanently from using it.

In any case, running this program can give an early indication of problems. You should run it before your limited warranty expires!

 2009-03-16, 05:44 #11 Uncwilly 6809 > 6502     """"""""""""""""""" Aug 2003 101×103 Posts 224348 Posts I have had Prime95 expose a memory problem with a laptop. I think that the heat of the processor on a different laptop may have killed off the HD.

 Similar Threads Thread Thread Starter Forum Replies Last Post jasong GPU Computing 19 2011-08-23 03:32 rogue Lounge 5 2009-10-02 15:02 Primeinator Information & Answers 5 2009-07-16 21:42 tribal Information & Answers 5 2009-03-19 20:54 drakkar67 Prime Sierpinski Project 14 2005-11-29 06:25

All times are UTC. The time now is 04:49.

Fri Apr 23 04:49:15 UTC 2021 up 14 days, 23:30, 0 users, load averages: 0.98, 1.60, 1.66