What is Prime95?
- Thread starter Nitrojan
- Start date
Soldato
- Joined
- 10 Apr 2004
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- 13,497
You have an overclocked PC and you didn't know that?
Pfft, standards these days are dropping
Pfft, standards these days are dropping
lmfao
your sig says your running at 3.5 ghz and you dont know what prime is
i take it your not a gamer....
As I said previously in a lot of my posts, I am new to overclocking.. I asked someone their advice and what settings to use and followed them up on it.. I want to check my system for stability and thus the reason for me coming across prime95.. Temps seemed good at this clock so I was happy.. Yes I am a noob at overclocking but surely everyone has to start somewhere? Would appreciate it you guys could help instead of laughing but yeah..
well id be using orthos for starters http://sp2004.fre3.com/beta/beta2.htm
core temp as well
runn orthos overnight at priority 9
i do an over night on small ffts then i do overnight on a blend
that is stable for me
Soldato
- Joined
- 25 Nov 2007
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- 5,581
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- London
so why is all 4 of my Q6600 cores 100%?... you talking about an old version of prime?
its a program used to hunt for prime numbers. some people use it as a stress testing tool for testing thier overclocks. but in reality its been shown that prime is not a good tool for stress testing since its primary function is to hunt for prime numbers. there are other tools out there that put an even higher load on the cpu creating more heat than prime ever can, such as SNM and Intel TAT.
Prime 95 is a program written to find prime numbers.
check out the GIMPS project.
Finding prime numbers takes a long time, so the code is optimised to be as fast as possible.
The heavily optimised code proved to be a very good test of the stability of a CPU and the overclocking community adopted it.
Nowadays the program has an option for stability testing, it didn't always it was written to find prime numbers.
BTW
Orthos is prime 95 the author just put a wrapper round it.
With the older versions of Prime 95 you had to start multiple copies to test all your cores.
The latest version automatically detect the number of cores and start multiple threads.
check out the GIMPS project.
Finding prime numbers takes a long time, so the code is optimised to be as fast as possible.
The heavily optimised code proved to be a very good test of the stability of a CPU and the overclocking community adopted it.
Nowadays the program has an option for stability testing, it didn't always it was written to find prime numbers.
BTW
Orthos is prime 95 the author just put a wrapper round it.
With the older versions of Prime 95 you had to start multiple copies to test all your cores.
The latest version automatically detect the number of cores and start multiple threads.
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Nitrojan dont worry about some of these posters as they just like winding people up
Like you I am a noob but for your own safety do a search amongst the forums and you will more than likely find your answers 
Take care and enjoy your PC
Its refreshing to see someone honest enough to state they know little about overclocking Nitrojan. It's much easier to help someone who is honest about there abilities than someone who claims to know a lot but in reality knows very little.
Good luck with the first overclock and if you need any help don't be afraid to ask and don't be put off by some of the guys around here. Have a good read through the stickies as a lot of the basics are covered there.
Good luck with the first overclock and if you need any help don't be afraid to ask and don't be put off by some of the guys around here. Have a good read through the stickies as a lot of the basics are covered there.
Echo what w3bbo has said, its obvious some people try to make themselves look bigger by trying to make other people look smaller! shame on you!
OcUK forums for the most part is one of the more friendly forums so lets keep it that way.
Nitrojan: Prime95 is just software thats designed to search for new prime numbers (mathmatics) however as it comes with a stress test the overclocking community have used it for many years to test the stability of machines/processors. If the CPU is a bit flaky the program will halt with an error and you know something is wrong.
There is no limit to the amount of time this program can run, it doesn't ever stop until it find an error so basically its up to you to decide when your machine is stable enough.
Back in the day I used to run Prime95 for a full 24 hours before I could be confident the overclock processor was stable however I have a few machines and its not such a hassle for me to tie one up in testing but a lot of folks with just one machine didn't want to wait a full 24 hours before they could start gaming and having fun so the duration got chopped down more and more.
Today the longest you would want to run the test is for approx 8-12 hours but even 1/2/4 hours is basically enough to indicate you got some stability. Normally if there is an error it will happen between 10 seconds and 1 hour so if you can pass this length you are heading in the right direction.
Personally I now am shying away from endless prime sessions because I have become obsessed with energy useage, can't tell you how many hundreds of ££££ I have spent on my electricity bills from running long priming sessions on multiple machines.
Hope that helps and good luck with the learning
I don't like prime95, it scares me,pushing my CPU far beyond anything it would ever have to do and making it heat up to 70C.
To be honest, like mentioned above, errors i find happen in the first few minutes, if i find it passes the first set of numbers, i.e. after a minute, it's stable enough for anything it'll be used for until i chuck it.
To be honest, like mentioned above, errors i find happen in the first few minutes, if i find it passes the first set of numbers, i.e. after a minute, it's stable enough for anything it'll be used for until i chuck it.