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186
 
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Last Login: 24/11/2008 22:42:07
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Hi everyone, i have a Intel Pentium 4 cpu which is using hyperthreading technology. when i run super Pi i get a result of 35.989s on 1M but it only uses one thread, so what is the REAL result when using both threads.
Is there a way of getting super Pi working on both threads or is there a way of working out the actual result
Plus also, does anyone know what temp a pentium 4 prescott edition chip can handle
Thanks
Red 
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Windows Vista Ultimate - 32bit
2.5Gb RAM
Intel Pentium 4 Extreme Edition (Prescott 2M XE)
3.73Ghz overclocked to 4.25Ghz
main HDD; SATA Seagate 512GB
second HDD; IDE seagate 250GB
ATI Radeon HD 2600 Pro 512mb graphics card
iCute Mesh ATX PC Case with Super Size 250mm Fan
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Pentium
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http://www.xtremesystems.org/forums/showthread.php?t=111462
Theres a version of SuperPi that can run on more than one core. Hyperthreading is using one core as two, so you may find that it is a little slower.
I'm not sure on max temps, but with your P4 at 3.92GHz, it looks to be pretty on the limit of what it can do.
Disclaimer: Any advice I provide is only applicable in my reality and may need altering to fit yours There is no place like 127.0.0.1
Best Video Evar! UPDATED
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186
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Last Login: 24/11/2008 22:42:07
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FreakShow! (28/05/2008)
http://www.xtremesystems.org/forums/showthread.php?t=111462
Theres a version of SuperPi that can run on more than one core. Hyperthreading is using one core as two, so you may find that it is a little slower.
I'm not sure on max temps, but with your P4 at 3.92GHz, it looks to be pretty on the limit of what it can do.
Damn, the link in the thread you sent me is a 404error
it can go higher but it gets too hot as i am only aircooling it.
i have pushed it just short of 5.00Ghz before but not recomended without watercooling
Thanks
Red
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Windows Vista Ultimate - 32bit
2.5Gb RAM
Intel Pentium 4 Extreme Edition (Prescott 2M XE)
3.73Ghz overclocked to 4.25Ghz
main HDD; SATA Seagate 512GB
second HDD; IDE seagate 250GB
ATI Radeon HD 2600 Pro 512mb graphics card
iCute Mesh ATX PC Case with Super Size 250mm Fan
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Pentium
Group: Forum Members
Last Login: Yesterday @ 16:30:12
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You could run two instances of super pi if you like. 
I have a Computer... Try some MM Super Pi(e) here!
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186
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Last Login: 24/11/2008 22:42:07
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-Wiz!- (28/05/2008)
You could run two instances of super pi if you like.
If i run two instences of pi, i would still get the same result or worse because they dont work together so they will be just slowing each other down
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Windows Vista Ultimate - 32bit
2.5Gb RAM
Intel Pentium 4 Extreme Edition (Prescott 2M XE)
3.73Ghz overclocked to 4.25Ghz
main HDD; SATA Seagate 512GB
second HDD; IDE seagate 250GB
ATI Radeon HD 2600 Pro 512mb graphics card
iCute Mesh ATX PC Case with Super Size 250mm Fan
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Pentium
Group: Forum Members
Last Login: Today @ 01:19:09
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That's hyperthreading for you. It's not the same as having two proper cores. With a multithreaded superpi it will be (most likely) slower anyway. As you are only running one thread of superpi the P4 will effectively run as one and all the power will go to superpi. When running two it splits itself up so both things (whatever they are) are running at half the speed of the P4.
Disclaimer: Any advice I provide is only applicable in my reality and may need altering to fit yours There is no place like 127.0.0.1
Best Video Evar! UPDATED
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Pentium
Group: Forum Members
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Hyperthreading was designed for when there is a "cache miss" and data has to be accessed from slower memory. During the waiting period, the CPU can run another task which is resident in the cache.
Running Super PI does not require much memory access and so the cache missing won't occur and mutli-threading will be of little use. I believe it is mainly used for small I/O interrupts which can be serviced while the CPU is busy, i.e. whilst encoding a movie your mouse should stay responsive and usable.
gaming: E4400@2.66GHz / P5K-E / 2x1GB PC8000@533MHz / 2x80GB D'Max 9-RAID0 + 320GB / 8800GTS 512MB / ViewSonic VX2835wm
server+media: P4 2.8GHz @ 2.4GHz / 775Dual-VSTA / 2x512MB PC3200 / 1000GB+500GB+250GB / HD2400pro
also: P3 for the mrs and a linux box and probably enough bits to build another one
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286
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Last Login: Yesterday @ 23:33:00
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how the hell [sorry - but] have you overclocked to 3.92Ghz?
Is it the same chip as mine - Prescott - Family F - Model 4 - Stepping 1 - Revision E0??
Mach2.4: XP Pro, E1200 @2.4Ghz, Asrock 4CORE1600TWINS-P35, Kingston HiperX 2GB PC6400 CL5, ATI Radeon HD3650 256MB GDDR3, Hiper 425W 120mm, Samsung 320GB 16MB SATA, Samsung 223BW WS TFT, Samsung DVD+/-RW, Casecom Blue LED Gaming Case, TDK Headphones, Belkin MIMO G+ Router.
SuperPi @ 26.032 Currently the fastest E1xxx on MM 
Laptop: Dell X200 12", 256MB PC133 RAM, 30GB HDD, Win XP Pro SP3, Belkin MIMO G+ Wifi.
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