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Underclocker · 05-01-2008, 03:43 AM

Prime95 and ORTHOS are two programs people use to stress their systems. If an overclocked computer is stable after running them for 10 hours, it would most likely mean it's stable for anything else you throw at it (even though this is disputed). ORTHOS is essentially a modified version of Prime95 for use on dual-core processors with a more friendly GUI and temperature readings. Take note that Prime95 tests only a single core at a time and ORTHOS is limited to two. You have to either run 4 instances of Prime95 or 2 instances of ORTHOS at the same time in order to fully stress a quad-core system. If you run into any errors with either program it would mean your overclock isn't stable.

Prime95: http://www.mersenne.org/freesoft.htm
ORTHOS: http://sp2004.fre3.com/beta/beta2.htm

EDIT: Yes, they are both safe and free.

05-01-2008, 03:43 AM	#2 (permalink)
Underclocker Tech Hardware Team Join Date: Aug 2007 Location: A land girt by sea. Posts: 551 OS: Windows XP Pro SP3 My System	Re: what is orthos? Prime95 and ORTHOS are two programs people use to stress their systems. If an overclocked computer is stable after running them for 10 hours, it would most likely mean it's stable for anything else you throw at it (even though this is disputed). ORTHOS is essentially a modified version of Prime95 for use on dual-core processors with a more friendly GUI and temperature readings. Take note that Prime95 tests only a single core at a time and ORTHOS is limited to two. You have to either run 4 instances of Prime95 or 2 instances of ORTHOS at the same time in order to fully stress a quad-core system. If you run into any errors with either program it would mean your overclock isn't stable. Prime95: http://www.mersenne.org/freesoft.htm ORTHOS: http://sp2004.fre3.com/beta/beta2.htm EDIT: Yes, they are both safe and free. __________________ Everest CPU-Z Memtest86 SpeedFan ORTHOS Last edited by Underclocker : 05-01-2008 at 03:45 AM.